CVE-2023-6246: Glibc: heap-based buffer overflow in __vsyslog_internal()
First published: Fri Nov 10 2023(Updated: )
A heap-based buffer overflow was found in the __vsyslog_internal function of the glibc library. This function is called by the syslog and vsyslog functions. This issue occurs when the openlog function was not called, or called with the ident argument set to NULL, and the program name (the basename of argv[0]) is bigger than 1024 bytes, resulting in an application crash or local privilege escalation. This issue affects glibc 2.36 and newer.
Credit: secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| GNU C Library (glibc) | =2.37 | |
| GNU C Library (glibc) | =2.36 | |
| GNU glibc | >=2.36<2.39 | |
| Fedoraproject Fedora | =38 | |
| Fedoraproject Fedora | =39 | |
| redhat/glibc | <2.39 | 2.39 |
| ubuntu/glibc | <2.38-1ubuntu6.1 | 2.38-1ubuntu6.1 |
| ubuntu/glibc | <2.37-15 | 2.37-15 |
| debian/glibc | 2.28-10+deb10u1 2.28-10+deb10u2 2.31-13+deb11u8 2.31-13+deb11u7 2.36-9+deb12u4 2.37-15 2.37-17 |
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Reference Links
- https://www.bleepingcomputer.com/news/security/new-linux-glibc-flaw-lets-attackers-get-root-on-major-distros/
- https://www.theregister.com/2024/02/05/sbf_off_the_hook_for/
- http://packetstormsecurity.com/files/176931/glibc-qsort-Out-Of-Bounds-Read-Write.html
- http://packetstormsecurity.com/files/176932/glibc-syslog-Heap-Based-Buffer-Overflow.html
- http://seclists.org/fulldisclosure/2024/Feb/3
- http://seclists.org/fulldisclosure/2024/Feb/5
- https://access.redhat.com/security/cve/CVE-2023-6246
- https://bugzilla.redhat.com/show_bug.cgi?id=2249053
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/D2FIH77VHY3KCRROCXOT6L27WMZXSJ2G/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MWQ6BZJ6CV5UAW4VZSKJ6TO4KIW2KWAQ/
- https://security.gentoo.org/glsa/202402-01
- https://security.netapp.com/advisory/ntap-20240216-0007/
- https://www.openwall.com/lists/oss-security/2024/01/30/6
- https://www.qualys.com/2024/01/30/cve-2023-6246/syslog.txt
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2123394
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2249053#c0
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2261987
- https://launchpad.net/bugs/cve/CVE-2023-6246
- https://www.qualys.com/2024/01/30/syslog
- https://sourceware.org/git?p=glibc.git;a=commit;h=52a5be0df411ef3ff45c10c7c308cb92993d15b1
- https://sourceware.org/git?p=glibc.git;a=commit;h=6bd0e4efcc78f3c0115e5ea9739a1642807450da
- https://sourceware.org/pipermail/libc-announce/2024/000037.html
- https://sourceware.org/git/?p=glibc.git;a=blob_plain;f=advisories/GLIBC-SA-2024-0001;hb=HEAD
- https://sourceware.org/cgit/glibc/tree/advisories/GLIBC-SA-2024-0001
- https://security-tracker.debian.org/tracker/CVE-2023-6246
- https://ubuntu.com/security/notices/USN-6620-1
- https://www.cve.org/CVERecord?id=CVE-2023-6246
- https://nvd.nist.gov/vuln/detail/CVE-2023-6246
- https://sourceware.org/git/?p=glibc.git;a=commit;h=6bd0e4efcc78f3c0115e5ea9739a1642807450da
- https://ubuntu.com/security/CVE-2023-6246
Peer vulnerabilities
(Found alongside the following vulnerabilities)
- collector/oss-sec
- source/oss-sec
- alias/CVE-2023-6246
- collector/bleeping-computer
- source/BleepingComputer
- alias/CVE-2022-39046
- alias/CVE-2023-6779
- alias/CVE-2023-6780
- alias/CVE-2023-4911
- agent/type
- agent/news-ai
- agent/software-canonical-lookup
- agent/software-canonical-lookup-request
- agent/title
- agent/first-publish-date
- agent/severity
- agent/weakness
- agent/remedy
- agent/author
- collector/the-register
- source/The Register
- agent/description
- collector/nvd-api
- source/NVD
- agent/references
- collector/nvd-cve
- agent/tags
- collector/mitre-cve
- source/MITRE
- collector/redhat-bugzilla
- source/Red Hat
- agent/last-modified-date
- collector/launchpad-cve
- source/Launchpad
- agent/event
- collector/security-tracker-debian
- source/Debian
- agent/softwarecombine
- collector/usn-cve
- source/Ubuntu
- vendor/gnu
- canonical/gnu c library (glibc)
- version/gnu c library (glibc)/2.37
- version/gnu c library (glibc)/2.36
- canonical/gnu glibc
- version/gnu glibc/2.36
- vendor/fedoraproject
- canonical/fedoraproject fedora
- version/fedoraproject fedora/38
- version/fedoraproject fedora/39
- package-manager/redhat
- package-manager/debian
- package-manager/ubuntu