Bug#1069191: glibc: GLIBC-SA-2024-0004/CVE-2024-2961: ISO-2022-CN-EXT: fix out-of-bound writes when writing escape sequence

[Charlemagne Lasse]

Hi,

Can this be backported to older Debian versions via the security repo?
This bug can be used to execute code when using the PHP engine:

* https://www.offensivecon.org/speakers/2024/charles-fol.html
* https://www.openwall.com/lists/oss-security/2024/04/18/4

Bug#1069191: glibc: GLIBC-SA-2024-0004/CVE-2024-2961: ISO-2022-CN-EXT: fix out-of-bound writes when writing escape sequence

[Salvatore Bonaccorso]

Source: glibc
Version: 2.37-17
Severity: important
Tags: security upstream
X-Debbugs-Cc: car...@debian.org, Debian Security Team 
Control: found -1 2.37-15
Control: found -1 2.36-9+deb12u5
Control: found -1 2.36-9+deb12u4
Control: found -1 2.36-9
Control: found -1 2.31-13+deb11u8
Control: found -1 2.31-13

Hi,

The following vulnerability was published for glibc.

CVE-2024-2961[0]:
| The iconv() function in the GNU C Library versions 2.39 and older
| may overflow the output buffer passed to it by up to 4 bytes when
| converting strings to the ISO-2022-CN-EXT character set, which may
| be used to crash an application or overwrite a neighbouring
| variable.


If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.

For further information see:

[0] https://security-tracker.debian.org/tracker/CVE-2024-2961
https://www.cve.org/CVERecord?id=CVE-2024-2961
[1] https://www.openwall.com/lists/oss-security/2024/04/17/9

Regards,
Salvatore