| Name | CVE-2023-6779 |
| Description | An off-by-one 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 these functions are called with a message bigger than INT_MAX bytes, leading to an incorrect calculation of the buffer size to store the message, resulting in an application crash. This issue affects glibc 2.37 and newer. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DSA-5611-1 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| glibc (PTS) | jessie, jessie (lts) | 2.19-18+deb8u14 | fixed |
| stretch (security) | 2.24-11+deb9u1 | fixed |
| stretch (lts), stretch | 2.24-11+deb9u7 | fixed |
| buster (security), buster, buster (lts) | 2.28-10+deb10u4 | fixed |
| bullseye | 2.31-13+deb11u11 | fixed |
| bullseye (security) | 2.31-13+deb11u10 | fixed |
| bookworm | 2.36-9+deb12u8 | fixed |
| bookworm (security) | 2.36-9+deb12u7 | fixed |
| sid, trixie | 2.40-3 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| glibc | source | jessie | (not affected) | | | |
| glibc | source | stretch | (not affected) | | | |
| glibc | source | buster | (not affected) | | | |
| glibc | source | bullseye | (not affected) | | | |
| glibc | source | bookworm | 2.36-9+deb12u4 | | DSA-5611-1 | |
| glibc | source | (unstable) | 2.37-15 | | | |
Notes
[bullseye] - glibc <not-affected> (Vulnerable code not present)
[buster] - glibc <not-affected> (Vulnerable code not present)
Fixed by: https://sourceware.org/git/?p=glibc.git;a=commit;h=7e5a0c286da33159d47d0122007aac016f3e02cd
https://sourceware.org/pipermail/libc-announce/2024/000037.html
https://sourceware.org/git/?p=glibc.git;a=blob_plain;f=advisories/GLIBC-SA-2024-0002;hb=HEAD
https://sourceware.org/cgit/glibc/tree/advisories/GLIBC-SA-2024-0002
[stretch] - glibc <not-affected> (Vulnerable code not present)
[jessie] - glibc <not-affected> (Vulnerable code not present)