CVE-2019-10639

{"containers": {"cna": {"affected": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "descriptions": [{"lang": "en", "value": "The Linux kernel 4.x (starting from 4.1) and 5.x before 5.0.8 allows Information Exposure (partial kernel address disclosure), leading to a KASLR bypass. Specifically, it is possible to extract the KASLR kernel image offset using the IP ID values the kernel produces for connection-less protocols (e.g., UDP and ICMP). When such traffic is sent to multiple destination IP addresses, it is possible to obtain hash collisions (of indices to the counter array) and thereby obtain the hashing key (via enumeration). This key contains enough bits from a kernel address (of a static variable) so when the key is extracted (via enumeration), the offset of the kernel image is exposed. This attack can be carried out remotely, by the attacker forcing the target device to send UDP or ICMP (or certain other) traffic to attacker-controlled IP addresses. Forcing a server to send UDP traffic is trivial if the server is a DNS server. ICMP traffic is trivial if the server answers ICMP Echo requests (ping). For client targets, if the target visits the attacker's web page, then WebRTC or gQUIC can be used to force UDP traffic to attacker-controlled IP addresses. NOTE: this attack against KASLR became viable in 4.1 because IP ID generation was changed to have a dependency on an address associated with a network namespace."}], "problemTypes": [{"descriptions": [{"description": "n/a", "lang": "en", "type": "text"}]}], "providerMetadata": {"dateUpdated": "2021-06-14T17:20:06.000Z", "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre"}, "references": [{"name": "openSUSE-SU-2019:1716", "tags": ["vendor-advisory", "x_refsource_SUSE"], "url": "http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00014.html"}, {"name": "openSUSE-SU-2019:1757", "tags": ["vendor-advisory", "x_refsource_SUSE"], "url": "http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00025.html"}, {"name": "[debian-lts-announce] 20190723 [SECURITY] [DLA 1862-1] linux security update", "tags": ["mailing-list", "x_refsource_MLIST"], "url": "https://lists.debian.org/debian-lts-announce/2019/07/msg00022.html"}, {"name": "20190813 [SECURITY] [DSA 4497-1] linux security update", "tags": ["mailing-list", "x_refsource_BUGTRAQ"], "url": "https://seclists.org/bugtraq/2019/Aug/18"}, {"name": "DSA-4497", "tags": ["vendor-advisory", "x_refsource_DEBIAN"], "url": "https://www.debian.org/security/2019/dsa-4497"}, {"name": "[debian-lts-announce] 20190814 [SECURITY] [DLA 1885-1] linux-4.9 security update", "tags": ["mailing-list", "x_refsource_MLIST"], "url": "https://lists.debian.org/debian-lts-announce/2019/08/msg00017.html"}, {"name": "USN-4115-1", "tags": ["vendor-advisory", "x_refsource_UBUNTU"], "url": "https://usn.ubuntu.com/4115-1/"}, {"name": "USN-4118-1", "tags": ["vendor-advisory", "x_refsource_UBUNTU"], "url": "https://usn.ubuntu.com/4118-1/"}, {"tags": ["x_refsource_MISC"], "url": "https://www.oracle.com/security-alerts/cpuApr2021.html"}, {"tags": ["x_refsource_MISC"], "url": "https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.0.8"}, {"tags": ["x_refsource_MISC"], "url": "https://github.com/torvalds/linux/commit/355b98553789b646ed97ad801a619ff898471b92"}, {"tags": ["x_refsource_MISC"], "url": "https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=355b98553789b646ed97ad801a619ff898471b92"}, {"tags": ["x_refsource_MISC"], "url": "https://arxiv.org/pdf/1906.10478.pdf"}, {"tags": ["x_refsource_CONFIRM"], "url": "https://security.netapp.com/advisory/ntap-20190806-0001/"}, {"tags": ["x_refsource_CONFIRM"], "url": "https://support.f5.com/csp/article/K32804955"}, {"tags": ["x_refsource_CONFIRM"], "url": "https://support.f5.com/csp/article/K32804955?utm_source=f5support&amp%3Butm_medium=RSS"}], "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "cve@mitre.org", "ID": "CVE-2019-10639", "STATE": "PUBLIC"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "n/a", "version": {"version_data": [{"version_value": "n/a"}]}}]}, "vendor_name": "n/a"}]}}, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "The Linux kernel 4.x (starting from 4.1) and 5.x before 5.0.8 allows Information Exposure (partial kernel address disclosure), leading to a KASLR bypass. Specifically, it is possible to extract the KASLR kernel image offset using the IP ID values the kernel produces for connection-less protocols (e.g., UDP and ICMP). When such traffic is sent to multiple destination IP addresses, it is possible to obtain hash collisions (of indices to the counter array) and thereby obtain the hashing key (via enumeration). This key contains enough bits from a kernel address (of a static variable) so when the key is extracted (via enumeration), the offset of the kernel image is exposed. This attack can be carried out remotely, by the attacker forcing the target device to send UDP or ICMP (or certain other) traffic to attacker-controlled IP addresses. Forcing a server to send UDP traffic is trivial if the server is a DNS server. ICMP traffic is trivial if the server answers ICMP Echo requests (ping). For client targets, if the target visits the attacker's web page, then WebRTC or gQUIC can be used to force UDP traffic to attacker-controlled IP addresses. NOTE: this attack against KASLR became viable in 4.1 because IP ID generation was changed to have a dependency on an address associated with a network namespace."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "n/a"}]}]}, "references": {"reference_data": [{"name": "openSUSE-SU-2019:1716", "refsource": "SUSE", "url": "http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00014.html"}, {"name": "openSUSE-SU-2019:1757", "refsource": "SUSE", "url": "http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00025.html"}, {"name": "[debian-lts-announce] 20190723 [SECURITY] [DLA 1862-1] linux security update", "refsource": "MLIST", "url": "https://lists.debian.org/debian-lts-announce/2019/07/msg00022.html"}, {"name": "20190813 [SECURITY] [DSA 4497-1] linux security update", "refsource": "BUGTRAQ", "url": "https://seclists.org/bugtraq/2019/Aug/18"}, {"name": "DSA-4497", "refsource": "DEBIAN", "url": "https://www.debian.org/security/2019/dsa-4497"}, {"name": "[debian-lts-announce] 20190814 [SECURITY] [DLA 1885-1] linux-4.9 security update", "refsource": "MLIST", "url": "https://lists.debian.org/debian-lts-announce/2019/08/msg00017.html"}, {"name": "USN-4115-1", "refsource": "UBUNTU", "url": "https://usn.ubuntu.com/4115-1/"}, {"name": "USN-4118-1", "refsource": "UBUNTU", "url": "https://usn.ubuntu.com/4118-1/"}, {"name": "https://www.oracle.com/security-alerts/cpuApr2021.html", "refsource": "MISC", "url": "https://www.oracle.com/security-alerts/cpuApr2021.html"}, {"name": "https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.0.8", "refsource": "MISC", "url": "https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.0.8"}, {"name": "https://github.com/torvalds/linux/commit/355b98553789b646ed97ad801a619ff898471b92", "refsource": "MISC", "url": "https://github.com/torvalds/linux/commit/355b98553789b646ed97ad801a619ff898471b92"}, {"name": "https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=355b98553789b646ed97ad801a619ff898471b92", "refsource": "MISC", "url": "https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=355b98553789b646ed97ad801a619ff898471b92"}, {"name": "https://arxiv.org/pdf/1906.10478.pdf", "refsource": "MISC", "url": "https://arxiv.org/pdf/1906.10478.pdf"}, {"name": "https://security.netapp.com/advisory/ntap-20190806-0001/", "refsource": "CONFIRM", "url": "https://security.netapp.com/advisory/ntap-20190806-0001/"}, {"name": "https://support.f5.com/csp/article/K32804955", "refsource": "CONFIRM", "url": "https://support.f5.com/csp/article/K32804955"}, {"name": "https://support.f5.com/csp/article/K32804955?utm_source=f5support&utm_medium=RSS", "refsource": "CONFIRM", "url": "https://support.f5.com/csp/article/K32804955?utm_source=f5support&utm_medium=RSS"}]}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T22:32:00.651Z"}, "title": "CVE Program Container", "references": [{"name": "openSUSE-SU-2019:1716", "tags": ["vendor-advisory", "x_refsource_SUSE", "x_transferred"], "url": "http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00014.html"}, {"name": "openSUSE-SU-2019:1757", "tags": ["vendor-advisory", "x_refsource_SUSE", "x_transferred"], "url": "http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00025.html"}, {"name": "[debian-lts-announce] 20190723 [SECURITY] [DLA 1862-1] linux security update", "tags": ["mailing-list", "x_refsource_MLIST", "x_transferred"], "url": "https://lists.debian.org/debian-lts-announce/2019/07/msg00022.html"}, {"name": "20190813 [SECURITY] [DSA 4497-1] linux security update", "tags": ["mailing-list", "x_refsource_BUGTRAQ", "x_transferred"], "url": "https://seclists.org/bugtraq/2019/Aug/18"}, {"name": "DSA-4497", "tags": ["vendor-advisory", "x_refsource_DEBIAN", "x_transferred"], "url": "https://www.debian.org/security/2019/dsa-4497"}, {"name": "[debian-lts-announce] 20190814 [SECURITY] [DLA 1885-1] linux-4.9 security update", "tags": ["mailing-list", "x_refsource_MLIST", "x_transferred"], "url": "https://lists.debian.org/debian-lts-announce/2019/08/msg00017.html"}, {"name": "USN-4115-1", "tags": ["vendor-advisory", "x_refsource_UBUNTU", "x_transferred"], "url": "https://usn.ubuntu.com/4115-1/"}, {"name": "USN-4118-1", "tags": ["vendor-advisory", "x_refsource_UBUNTU", "x_transferred"], "url": "https://usn.ubuntu.com/4118-1/"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://www.oracle.com/security-alerts/cpuApr2021.html"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.0.8"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://github.com/torvalds/linux/commit/355b98553789b646ed97ad801a619ff898471b92"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=355b98553789b646ed97ad801a619ff898471b92"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://arxiv.org/pdf/1906.10478.pdf"}, {"tags": ["x_refsource_CONFIRM", "x_transferred"], "url": "https://security.netapp.com/advisory/ntap-20190806-0001/"}, {"tags": ["x_refsource_CONFIRM", "x_transferred"], "url": "https://support.f5.com/csp/article/K32804955"}, {"tags": ["x_refsource_CONFIRM", "x_transferred"], "url": "https://support.f5.com/csp/article/K32804955?utm_source=f5support&amp%3Butm_medium=RSS"}]}]}, "cveMetadata": {"assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "assignerShortName": "mitre", "cveId": "CVE-2019-10639", "datePublished": "2019-07-05T22:07:27.000Z", "dateReserved": "2019-03-29T00:00:00.000Z", "dateUpdated": "2024-08-04T22:32:00.651Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

{}

{"affected": [{"affectedData": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "source": "cve@mitre.org"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "ED11DE6F-3BE1-4212-A97A-BB052A591CB2", "versionEndIncluding": "4.20.9", "versionStartIncluding": "4.1", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "B8C3EB64-4B85-4C0E-B9BD-5342B604A466", "versionEndExcluding": "5.0.8", "versionStartIncluding": "5.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "The Linux kernel 4.x (starting from 4.1) and 5.x before 5.0.8 allows Information Exposure (partial kernel address disclosure), leading to a KASLR bypass. Specifically, it is possible to extract the KASLR kernel image offset using the IP ID values the kernel produces for connection-less protocols (e.g., UDP and ICMP). When such traffic is sent to multiple destination IP addresses, it is possible to obtain hash collisions (of indices to the counter array) and thereby obtain the hashing key (via enumeration). This key contains enough bits from a kernel address (of a static variable) so when the key is extracted (via enumeration), the offset of the kernel image is exposed. This attack can be carried out remotely, by the attacker forcing the target device to send UDP or ICMP (or certain other) traffic to attacker-controlled IP addresses. Forcing a server to send UDP traffic is trivial if the server is a DNS server. ICMP traffic is trivial if the server answers ICMP Echo requests (ping). For client targets, if the target visits the attacker's web page, then WebRTC or gQUIC can be used to force UDP traffic to attacker-controlled IP addresses. NOTE: this attack against KASLR became viable in 4.1 because IP ID generation was changed to have a dependency on an address associated with a network namespace."}, {"lang": "es", "value": "El kernel de Linux versi\u00f3n 4.x (a partir de versi\u00f3n 4.1) y versi\u00f3n 5.x anterior a 5.0.8, permite la Exposici\u00f3n de Informaci\u00f3n (divulgaci\u00f3n parcial de la direcci\u00f3n del kernel), lo que conlleva a una omisi\u00f3n de la funcionalidad KASLR. Espec\u00edficamente, es posible extraer el desplazamiento de la imagen del kernel KASLR utilizando los valores ID de IP que el kernel produce para los protocolos sin conexi\u00f3n (por ejemplo, UDP e ICMP). Cuando dicho tr\u00e1fico se env\u00eda a m\u00faltiples direcciones IP de destino, es posible obtener colisiones de hash (de \u00edndices en la matriz counter) y, por lo tanto, obtener la clave de hashing (mediante enumeraci\u00f3n). Esta clave contiene suficientes bits de una direcci\u00f3n de kernel (de una variable est\u00e1tica) de manera que cuando se extrae la clave (por medio de la enumeraci\u00f3n), queda expuesto el desplazamiento de la imagen del kernel. Este ataque se puede llevar a cabo remotamente, ya que el atacante forza al dispositivo de destino a enviar tr\u00e1fico UDP o ICMP (o algunos otros) hacia direcciones IP controladas por el atacante. Forzar a un servidor a enviar tr\u00e1fico UDP es trivial si el servidor es un servidor DNS. El tr\u00e1fico de ICMP es trivial si el servidor responde a las peticiones de Eco de ICMP (ping). Para los objetivos cliente, si el objetivo visita la p\u00e1gina web del atacante, entonces puede ser usado WebRTC o gQUIC para forzar el tr\u00e1fico UDP hacia las direcciones IP controladas por el atacante. NOTA: este ataque contra KASLR se volvi\u00f3 viable en versi\u00f3n 4.1 porque la generaci\u00f3n de ID de IP fue cambiada para tener una dependencia en una direcci\u00f3n asociada con un espacio de nombre de red."}], "id": "CVE-2019-10639", "lastModified": "2026-06-17T02:11:25.317", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "NONE", "baseScore": 5.0, "confidentialityImpact": "PARTIAL", "integrityImpact": "NONE", "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N", "version": "2.0"}, "exploitabilityScore": 10.0, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV30": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "version": "3.0"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2019-07-05T23:15:10.477", "references": [{"source": "cve@mitre.org", "url": "http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00014.html"}, {"source": "cve@mitre.org", "url": "http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00025.html"}, {"source": "cve@mitre.org", "tags": ["Third Party Advisory"], "url": "https://arxiv.org/pdf/1906.10478.pdf"}, {"source": "cve@mitre.org", "tags": ["Mailing List", "Release Notes", "Vendor Advisory"], "url": "https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.0.8"}, {"source": "cve@mitre.org", "tags": ["Mailing List", "Patch", "Vendor Advisory"], "url": "https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=355b98553789b646ed97ad801a619ff898471b92"}, {"source": "cve@mitre.org", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/torvalds/linux/commit/355b98553789b646ed97ad801a619ff898471b92"}, {"source": "cve@mitre.org", "url": "https://lists.debian.org/debian-lts-announce/2019/07/msg00022.html"}, {"source": "cve@mitre.org", "url": "https://lists.debian.org/debian-lts-announce/2019/08/msg00017.html"}, {"source": "cve@mitre.org", "url": "https://seclists.org/bugtraq/2019/Aug/18"}, {"source": "cve@mitre.org", "url": "https://security.netapp.com/advisory/ntap-20190806-0001/"}, {"source": "cve@mitre.org", "url": "https://support.f5.com/csp/article/K32804955"}, {"source": "cve@mitre.org", "url": "https://support.f5.com/csp/article/K32804955?utm_source=f5support&amp%3Butm_medium=RSS"}, {"source": "cve@mitre.org", "url": "https://usn.ubuntu.com/4115-1/"}, {"source": "cve@mitre.org", "url": "https://usn.ubuntu.com/4118-1/"}, {"source": "cve@mitre.org", "url": "https://www.debian.org/security/2019/dsa-4497"}, {"source": "cve@mitre.org", "url": "https://www.oracle.com/security-alerts/cpuApr2021.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00014.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00025.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://arxiv.org/pdf/1906.10478.pdf"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Release Notes", "Vendor Advisory"], "url": "https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.0.8"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Patch", "Vendor Advisory"], "url": "https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=355b98553789b646ed97ad801a619ff898471b92"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/torvalds/linux/commit/355b98553789b646ed97ad801a619ff898471b92"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.debian.org/debian-lts-announce/2019/07/msg00022.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.debian.org/debian-lts-announce/2019/08/msg00017.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://seclists.org/bugtraq/2019/Aug/18"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://security.netapp.com/advisory/ntap-20190806-0001/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://support.f5.com/csp/article/K32804955"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://support.f5.com/csp/article/K32804955?utm_source=f5support&amp%3Butm_medium=RSS"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://usn.ubuntu.com/4115-1/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://usn.ubuntu.com/4118-1/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://www.debian.org/security/2019/dsa-4497"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://www.oracle.com/security-alerts/cpuApr2021.html"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-326"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"affected_release": [{"advisory": "RHSA-2020:1070", "cpe": "cpe:/a:redhat:rhel_extras_rt:7", "package": "kernel-rt-0:3.10.0-1127.rt56.1093.el7", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2020-03-31T00:00:00Z"}, {"advisory": "RHSA-2020:1016", "cpe": "cpe:/o:redhat:enterprise_linux:7", "package": "kernel-0:3.10.0-1127.el7", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2020-03-31T00:00:00Z"}, {"advisory": "RHSA-2020:2522", "cpe": "cpe:/o:redhat:rhel_eus:7.7", "package": "kernel-0:3.10.0-1062.26.1.el7", "product_name": "Red Hat Enterprise Linux 7.7 Extended Update Support", "release_date": "2020-06-11T00:00:00Z"}, {"advisory": "RHSA-2020:1567", "cpe": "cpe:/a:redhat:enterprise_linux:8::nfv", "package": "kernel-rt-0:4.18.0-193.rt13.51.el8", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2020-04-28T00:00:00Z"}, {"advisory": "RHSA-2020:1769", "cpe": "cpe:/o:redhat:enterprise_linux:8", "package": "kernel-0:4.18.0-193.el8", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2020-04-28T00:00:00Z"}], "bugzilla": {"description": "Kernel: net: using kernel space address bits to derive IP ID may potentially break KASLR", "id": "1729933", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1729933"}, "csaw": false, "cvss3": {"cvss3_base_score": "3.7", "cvss3_scoring_vector": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N", "status": "verified"}, "cwe": "CWE-200", "details": ["The Linux kernel 4.x (starting from 4.1) and 5.x before 5.0.8 allows Information Exposure (partial kernel address disclosure), leading to a KASLR bypass. Specifically, it is possible to extract the KASLR kernel image offset using the IP ID values the kernel produces for connection-less protocols (e.g., UDP and ICMP). When such traffic is sent to multiple destination IP addresses, it is possible to obtain hash collisions (of indices to the counter array) and thereby obtain the hashing key (via enumeration). This key contains enough bits from a kernel address (of a static variable) so when the key is extracted (via enumeration), the offset of the kernel image is exposed. This attack can be carried out remotely, by the attacker forcing the target device to send UDP or ICMP (or certain other) traffic to attacker-controlled IP addresses. Forcing a server to send UDP traffic is trivial if the server is a DNS server. ICMP traffic is trivial if the server answers ICMP Echo requests (ping). For client targets, if the target visits the attacker's web page, then WebRTC or gQUIC can be used to force UDP traffic to attacker-controlled IP addresses. NOTE: this attack against KASLR became viable in 4.1 because IP ID generation was changed to have a dependency on an address associated with a network namespace.", "A flaw was found in the way the Linux kernel derived the IP ID field from a partial kernel space address returned by a net_hash_mix() function. A remote user could observe this IP ID field to extract the kernel\u00a0address bits used to derive its value, which may result in leaking the hash key and potentially defeating KASLR."], "name": "CVE-2019-10639", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 5"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "kernel-alt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/a:redhat:enterprise_mrg:2", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise MRG 2"}], "public_date": "2019-07-15T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2019-10639\nhttps://nvd.nist.gov/vuln/detail/CVE-2019-10639\nhttps://arxiv.org/pdf/1906.10478.pdf"], "statement": "This issue does not affect the versions of Linux kernel as shipped with Red Hat Enterprise Linux 5 and Red Hat Enterprise Linux 6.\nThis issue affects the version of Linux kernel as shipped with Red Hat Enterprise Linux 7, 8 and Red Hat Enterprise MRG 2. Future kernel updates for Red Hat Enterprise Linux 7, 8 and Red Hat Enterprise MRG 2 may address this issue.", "threat_severity": "Low"}

{}