CVE-2009-1897

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{"affected": [{"affectedData": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "source": "secalert@redhat.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:2.6.30:*:*:*:*:*:*:*", "matchCriteriaId": "10E55450-F6D9-483C-9CC8-E651E5A12AB1", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:2.6.30:rc1:*:*:*:*:*:*", "matchCriteriaId": "45273823-29EA-44DE-8444-3933402C5793", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:2.6.30:rc2:*:*:*:*:*:*", "matchCriteriaId": "88F60E74-09DB-4D4A-B922-4A46EED0EC20", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:2.6.30:rc3:*:*:*:*:*:*", "matchCriteriaId": "E242D3DE-D1DC-406A-BCC3-C4380B7EC369", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:2.6.30:rc4:x86_32:*:*:*:*:*", "matchCriteriaId": "06EFB3F7-2EAE-4A56-A9A1-E8C734E6B91E", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:2.6.30:rc5:*:*:*:*:*:*", "matchCriteriaId": "8598D6E5-0C5C-4A31-841A-C12801DB7D91", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:2.6.30:rc6:*:*:*:*:*:*", "matchCriteriaId": "59800B0A-477B-42F8-A58A-5144F455AE01", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:2.6.30:rc7-git6:*:*:*:*:*:*", "matchCriteriaId": "F166BF6B-BFB0-4206-BD59-179701572F1C", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:2.6.30.1:*:*:*:*:*:*:*", "matchCriteriaId": "99AC6D46-A0BF-4F1D-88BB-03BF74FDB84F", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "The tun_chr_poll function in drivers/net/tun.c in the tun subsystem in the Linux kernel 2.6.30 and 2.6.30.1, when the -fno-delete-null-pointer-checks gcc option is omitted, allows local users to gain privileges via vectors involving a NULL pointer dereference and an mmap of /dev/net/tun, a different vulnerability than CVE-2009-1894."}, {"lang": "es", "value": "La funci\u00f3n tun_chr_poll en drivers/net/tun.c en el subsistema tun del kernel de Linux v2.6.30 y v2.6.30.1, cuando se omite la opci\u00f3n -fno-delete-null-pointer-checks en gcc, permite a atacantes locales obtener privilegios a trav\u00e9s de vectores que implican desreferenciacion de punteros NULL y un nmap de /dev/net/tun, es una vulnerabilidad diferente a CVE-2009-1894."}], "id": "CVE-2009-1897", "lastModified": "2026-06-16T23:08:18.753", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "MEDIUM", "accessVector": "LOCAL", "authentication": "NONE", "availabilityImpact": "COMPLETE", "baseScore": 6.9, "confidentialityImpact": "COMPLETE", "integrityImpact": "COMPLETE", "vectorString": "AV:L/AC:M/Au:N/C:C/I:C/A:C", "version": "2.0"}, "exploitabilityScore": 3.4, "impactScore": 10.0, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}]}, "published": "2009-07-20T17:30:54.733", "references": [{"source": "secalert@redhat.com", "url": "http://archives.neohapsis.com/archives/fulldisclosure/2009-07/0241.html"}, {"source": "secalert@redhat.com", "url": "http://archives.neohapsis.com/archives/fulldisclosure/2009-07/0246.html"}, {"source": "secalert@redhat.com", "url": "http://article.gmane.org/gmane.linux.network/124939"}, {"source": "secalert@redhat.com", "url": "http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=3c8a9c63d5fd738c261bd0ceece04d9c8357ca13"}, {"source": "secalert@redhat.com", "tags": ["Patch"], "url": "http://grsecurity.net/~spender/cheddar_bay.tgz"}, {"source": "secalert@redhat.com", "tags": ["Exploit"], "url": "http://isc.sans.org/diary.html?storyid=6820"}, {"source": "secalert@redhat.com", "tags": ["Exploit"], "url": "http://lkml.org/lkml/2009/7/6/19"}, {"source": "secalert@redhat.com", "tags": ["Vendor Advisory"], "url": "http://secunia.com/advisories/35839"}, {"source": "secalert@redhat.com", "url": "http://www.openwall.com/lists/oss-security/2009/07/17/1"}, {"source": "secalert@redhat.com", "tags": ["Patch", "Vendor Advisory"], "url": "http://www.vupen.com/english/advisories/2009/1925"}, {"source": "secalert@redhat.com", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=512284"}, {"source": "secalert@redhat.com", "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/51803"}, {"source": "secalert@redhat.com", "url": "https://www.redhat.com/en/blog/security-flaws-caused-compiler-optimizations"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://archives.neohapsis.com/archives/fulldisclosure/2009-07/0241.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://archives.neohapsis.com/archives/fulldisclosure/2009-07/0246.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://article.gmane.org/gmane.linux.network/124939"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=3c8a9c63d5fd738c261bd0ceece04d9c8357ca13"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "http://grsecurity.net/~spender/cheddar_bay.tgz"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit"], "url": "http://isc.sans.org/diary.html?storyid=6820"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit"], "url": "http://lkml.org/lkml/2009/7/6/19"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "http://secunia.com/advisories/35839"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.openwall.com/lists/oss-security/2009/07/17/1"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Vendor Advisory"], "url": "http://www.vupen.com/english/advisories/2009/1925"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=512284"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/51803"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://www.redhat.com/en/blog/security-flaws-caused-compiler-optimizations"}], "sourceIdentifier": "secalert@redhat.com", "vendorComments": [{"comment": "Red Hat is aware of this issue and is tracking it via the following bug:\nhttps://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=CVE-2009-1897\n\nThe flaw only affects the Red Hat Enterprise Linux 5.4 beta kernel, which includes a backport of the upstream bug fix introducing this flaw (git commit 33dccbb0). This issue did not affect the final released Red Hat Enterprise Linux 5.4 kernel. It is also possible to mitigate this flaw by ensuring that the permissions for /dev/net/tun is restricted to root only.\n\nThis issue does not affect any other released kernel in any Red Hat product.", "lastModified": "2009-09-02T00:00:00", "organization": "Red Hat"}], "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-119"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: tun/tap: Fix crashes if open() /dev/net/tun and then poll() it", "id": "512284", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=512284"}, "csaw": false, "cvss": {"cvss_base_score": "6.9", "cvss_scoring_vector": "AV:L/AC:M/Au:N/C:C/I:C/A:C", "status": "draft"}, "details": ["The tun_chr_poll function in drivers/net/tun.c in the tun subsystem in the Linux kernel 2.6.30 and 2.6.30.1, when the -fno-delete-null-pointer-checks gcc option is omitted, allows local users to gain privileges via vectors involving a NULL pointer dereference and an mmap of /dev/net/tun, a different vulnerability than CVE-2009-1894."], "name": "CVE-2009-1897", "public_date": "2009-04-09T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2009-1897"], "statement": "The flaw only affects the Red Hat Enterprise Linux 5.4 beta kernel, which includes a backport of the upstream bug fix introducing this flaw (git commit 33dccbb0). This issue did not affect the final released Red Hat Enterprise Linux 5.4 kernel. It is also possible to mitigate this flaw by ensuring that the permissions for /dev/net/tun is restricted to root only.\nThis issue does not affect any other released kernel in any Red Hat product.", "threat_severity": "Important"}

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