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funci\u00f3n journal_unmap_buffer en fs/jbd2/transaction.c en el kernel de linux anterior a v3.3.1 no maneja correctamente el \"buffer head states\" _Delay y _Unwritten, permitiendo a usuarios locales causar una denegaci\u00f3n de servicio aprovech\u00e1ndose de la presencia de un sistema de ficheros ext4 que est\u00e1 montado con journal"}], "id": "CVE-2011-4086", "lastModified": "2024-11-21T01:31:49.087", "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": "2012-07-03T16:40:31.020", "references": [{"source": "secalert@redhat.com", "url": "http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=15291164b22a357cb211b618adfef4fa82fc0de3"}, {"source": "secalert@redhat.com", "url": "http://lists.opensuse.org/opensuse-security-announce/2012-04/msg00021.html"}, {"source": "secalert@redhat.com", "url": "http://lists.opensuse.org/opensuse-security-announce/2012-05/msg00013.html"}, {"source": "secalert@redhat.com", "url": "http://rhn.redhat.com/errata/RHSA-2012-0571.html"}, {"source": "secalert@redhat.com", "url": "http://rhn.redhat.com/errata/RHSA-2012-0670.html"}, {"source": "secalert@redhat.com", "url": "http://secunia.com/advisories/48898"}, {"source": "secalert@redhat.com", "url": "http://secunia.com/advisories/48964"}, {"source": "secalert@redhat.com", "url": "http://www.debian.org/security/2012/dsa-2469"}, {"source": "secalert@redhat.com", "url": "http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.3.1"}, {"source": "secalert@redhat.com", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=749143"}, {"source": "secalert@redhat.com", "tags": ["Patch"], "url": "https://github.com/torvalds/linux/commit/15291164b22a357cb211b618adfef4fa82fc0de3"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=15291164b22a357cb211b618adfef4fa82fc0de3"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://lists.opensuse.org/opensuse-security-announce/2012-04/msg00021.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://lists.opensuse.org/opensuse-security-announce/2012-05/msg00013.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://rhn.redhat.com/errata/RHSA-2012-0571.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://rhn.redhat.com/errata/RHSA-2012-0670.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://secunia.com/advisories/48898"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://secunia.com/advisories/48964"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.debian.org/security/2012/dsa-2469"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.3.1"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=749143"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://github.com/torvalds/linux/commit/15291164b22a357cb211b618adfef4fa82fc0de3"}], "sourceIdentifier": "secalert@redhat.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-119"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"affected_release": [{"advisory": "RHSA-2012:0107", "cpe": "cpe:/o:redhat:enterprise_linux:5", "package": "kernel-0:2.6.18-274.18.1.el5", "product_name": "Red Hat Enterprise Linux 5", "release_date": "2012-02-09T00:00:00Z"}, {"advisory": "RHSA-2012:0571", "cpe": "cpe:/o:redhat:enterprise_linux:6", "package": "kernel-0:2.6.32-220.17.1.el6", "product_name": "Red Hat Enterprise Linux 6", "release_date": "2012-05-15T00:00:00Z"}, {"advisory": "RHSA-2012:0670", "cpe": "cpe:/a:redhat:enterprise_mrg:2:server:el6", "package": "kernel-rt-0:3.0.30-rt50.62.el6rt", "product_name": "Red Hat Enterprise MRG 2", "release_date": "2012-05-15T00:00:00Z"}], "bugzilla": {"description": "kernel: jbd2: unmapped buffer with _Unwritten or _Delay flags set can lead to DoS", "id": "749143", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=749143"}, "csaw": false, "cvss": {"cvss_base_score": "4.9", "cvss_scoring_vector": "AV:L/AC:L/Au:N/C:N/I:N/A:C", "status": "verified"}, "details": ["The journal_unmap_buffer function in fs/jbd2/transaction.c in the Linux kernel before 3.3.1 does not properly handle the _Delay and _Unwritten buffer head states, which allows local users to cause a denial of service (system crash) by leveraging the presence of an ext4 filesystem that was mounted with a journal."], "name": "CVE-2011-4086", "public_date": "2012-01-25T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2011-4086\nhttps://nvd.nist.gov/vuln/detail/CVE-2011-4086"], "statement": "This has been addressed in Red Hat Enterprise Linux 5, 6, and Red Hat Enterprise MRG via https://rhn.redhat.com/errata/RHSA-2012-0107.html, https://rhn.redhat.com/errata/RHSA-2012-0571.html, and https://rhn.redhat.com/errata/RHSA-2012-0670.html. Red Hat Enterprise Linux 4 is now in Production 3 of the maintenance life-cycle, https://access.redhat.com/support/policy/updates/errata/, therefore the fix for this issue is not currently planned to be included in the future updates.", "threat_severity": "Moderate"}