| Name | CVE-2023-6780 |
| Description | An integer 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 very long message, leading to an incorrect calculation of the buffer size to store the message, resulting in undefined behavior. 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 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| glibc (PTS) | buster | 2.28-10+deb10u1 | fixed |
| buster (security) | 2.28-10+deb10u2 | fixed | |
| bullseye | 2.31-13+deb11u8 | fixed | |
| bullseye (security) | 2.31-13+deb11u9 | fixed | |
| bookworm | 2.36-9+deb12u4 | fixed | |
| bookworm (security) | 2.36-9+deb12u6 | fixed | |
| trixie | 2.37-18 | fixed | |
| sid | 2.37-19 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| 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 |
[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=ddf542da94caf97ff43cc2875c88749880b7259b
https://sourceware.org/pipermail/libc-announce/2024/000037.html
https://sourceware.org/git/?p=glibc.git;a=blob_plain;f=advisories/GLIBC-SA-2024-0003;hb=HEAD
https://sourceware.org/cgit/glibc/tree/advisories/GLIBC-SA-2024-0003