CVE-2015-3636

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{"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": "3918BCE8-1066-4D3E-A44A-126FCFA0C97B", "versionEndIncluding": "4.0.2", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*", "matchCriteriaId": "16F59A04-14CF-49E2-9973-645477EA09DA", "vulnerable": true}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*", "matchCriteriaId": "2F6AB192-9D7D-4A9A-8995-E53A9DE9EAFC", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:lts:*:*:*", "matchCriteriaId": "B6B7CAD7-9D4E-4FDB-88E3-1E583210A01F", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "The ping_unhash function in net/ipv4/ping.c in the Linux kernel before 4.0.3 does not initialize a certain list data structure during an unhash operation, which allows local users to gain privileges or cause a denial of service (use-after-free and system crash) by leveraging the ability to make a SOCK_DGRAM socket system call for the IPPROTO_ICMP or IPPROTO_ICMPV6 protocol, and then making a connect system call after a disconnect."}, {"lang": "es", "value": "Vulnerabilidad en la funci\u00f3n ping_unhash en net/ipv4/ping.c en el kernel de Linux en versiones anteriores a 4.0.3, no inicializa una cierta estructura de datos de lista durante una operaci\u00f3n unhash, lo que permite a usuarios locales obtener privilegios o causar una denegaci\u00f3n de servicio (uso despu\u00e9s de liberaci\u00f3n de memoria y ca\u00edda del sistema) mediante el aprovechamiento de la capacidad de hacer una llamada a un socket de sistema SOCK_DGRAM para el protocolo IPROTO_ICMP o IPROTO_ICMPV6 y entonces hacer una llamada al sistema de conexi\u00f3n tras una desconexi\u00f3n."}], "evaluatorComment": "<a href=\"http://cwe.mitre.org/data/definitions/416.html\">CWE-416: Use After Free</a>", "id": "CVE-2015-3636", "lastModified": "2026-06-17T00:26:01.093", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "LOCAL", "authentication": "NONE", "availabilityImpact": "COMPLETE", "baseScore": 4.9, "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:L/AC:L/Au:N/C:N/I:N/A:C", "version": "2.0"}, "exploitabilityScore": 3.9, "impactScore": 6.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}]}, "published": "2015-08-06T01:59:00.130", "references": [{"source": "cve@mitre.org", "url": 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{"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.ubuntu.com/usn/USN-2633-1"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.ubuntu.com/usn/USN-2634-1"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1218074"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://github.com/torvalds/linux/commit/a134f083e79fb4c3d0a925691e732c56911b4326"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-Other"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"affected_release": [{"advisory": "RHSA-2015:1221", "cpe": "cpe:/o:redhat:enterprise_linux:6", "package": "kernel-0:2.6.32-504.30.3.el6", "product_name": "Red Hat Enterprise Linux 6", "release_date": "2015-07-14T00:00:00Z"}, {"advisory": "RHSA-2015:1643", "cpe": "cpe:/o:redhat:rhel_aus:6.4", "package": "kernel-0:2.6.32-358.65.1.el6", "product_name": "Red Hat Enterprise Linux 6.4 Advanced Update Support", "release_date": "2015-08-18T00:00:00Z"}, {"advisory": "RHSA-2015:1583", "cpe": "cpe:/o:redhat:rhel_eus:6.5", "package": "kernel-0:2.6.32-431.61.2.el6", "product_name": "Red Hat Enterprise Linux 6.5 Extended Update Support", "release_date": "2015-08-11T00:00:00Z"}, {"advisory": "RHSA-2015:1565", "cpe": "cpe:/a:redhat:rhel_extras_rt:7", "package": "kernel-rt-0:3.10.0-229.11.1.rt56.141.11.el7_1", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2015-08-05T00:00:00Z"}, {"advisory": "RHSA-2015:1534", "cpe": "cpe:/o:redhat:enterprise_linux:7", "package": "kernel-0:3.10.0-229.11.1.ael7b", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2015-08-06T00:00:00Z"}, {"advisory": "RHSA-2015:1564", "cpe": "cpe:/a:redhat:enterprise_mrg:2:server:el6", "package": "kernel-rt-1:3.10.0-229.rt56.158.el6rt", "product_name": "Red Hat Enterprise MRG 2", "release_date": "2015-08-05T00:00:00Z"}], "bugzilla": {"description": "kernel: ping sockets: use-after-free leading to local privilege escalation", "id": "1218074", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1218074"}, "csaw": false, "cvss": {"cvss_base_score": "6.0", "cvss_scoring_vector": "AV:L/AC:H/Au:S/C:C/I:C/A:C", "status": "verified"}, "cwe": "CWE-416", "details": ["The ping_unhash function in net/ipv4/ping.c in the Linux kernel before 4.0.3 does not initialize a certain list data structure during an unhash operation, which allows local users to gain privileges or cause a denial of service (use-after-free and system crash) by leveraging the ability to make a SOCK_DGRAM socket system call for the IPPROTO_ICMP or IPPROTO_ICMPV6 protocol, and then making a connect system call after a disconnect.", "It was found that the Linux kernel's ping socket implementation did not properly handle socket unhashing during spurious disconnects, which could lead to a use-after-free flaw. On x86-64 architecture systems, a local user able to create ping sockets could use this flaw to crash the system. On non-x86-64 architecture systems, a local user able to create ping sockets could use this flaw to escalate their privileges on the system."], "mitigation": {"lang": "en:us", "value": "You can check whether ping socket functionality is enabled by examining the net.ipv4.ping_group_range sysctl value:\n~]# sysctl net.ipv4.ping_group_range\nnet.ipv4.ping_group_range = 10\n\"1 0\" is the default value and disables the ping socket functionality even for root user. Any other value means that the ping socket functionality might be enabled for certain users on the system.\nTo mitigate this vulnerability make sure that you either allow the functionality to trusted local users (groups) only or set the net.ipv4.ping_group_range sysctl to the default and disabled state:\n~]# sysctl net.ipv4.ping_group_range=\"1 0\"\nPlease note that this might prevent some programs relying on this functionality from functioning properly."}, "name": "CVE-2015-3636", "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:rhel_eus:6.2", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux Extended Update Support 6.2"}], "public_date": "2015-05-02T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2015-3636\nhttps://nvd.nist.gov/vuln/detail/CVE-2015-3636"], "statement": "This issue does not affect the Linux kernel as shipped with Red Hat Enterprise Linux 5. This issue does affect the Linux kernel as shipped with Red Hat Enterprise Linux 6, 7 and Red Hat Enterprise MRG 2. Future kernel updates for the respective releases will address this issue.\nPlease note that on x86-64 architecture systems the impact is limited to local Denial of Service and that the ping sockets functionality is disabled by default (net.ipv4.ping_group_range sysctl is \"10\").", "threat_severity": "Moderate"}

{}