| Name | CVE-2021-43396 |
| Description | In iconvdata/iso-2022-jp-3.c in the GNU C Library (aka glibc) 2.34, remote attackers can force iconv() to emit a spurious '\0' character via crafted ISO-2022-JP-3 data that is accompanied by an internal state reset. This may affect data integrity in certain iconv() use cases. NOTE: the vendor states "the bug cannot be invoked through user input and requires iconv to be invoked with a NULL inbuf, which ought to require a separate application bug to do so unintentionally. Hence there's no security impact to the bug. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 998622 |
Vulnerable and fixed packages
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 |
| sid, trixie | 2.37-18 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| glibc | source | stretch | (not affected) | | | |
| glibc | source | buster | (not affected) | | | |
| glibc | source | bullseye | 2.31-13+deb11u3 | | | |
| glibc | source | (unstable) | 2.32-5 | unimportant | | 998622 |
Notes
[buster] - glibc <not-affected> (Vulnerable code not present)
[stretch] - glibc <not-affected> (Vulnerable code not present)
https://sourceware.org/bugzilla/show_bug.cgi?id=28524
Fixed by: https://sourceware.org/git/?p=glibc.git;a=commit;h=ff012870b2c02a62598c04daa1e54632e020fd7d
Introduced by the fix for CVE-2021-3326 / BZ#27256: https://sourceware.org/git/?p=glibc.git;a=commit;h=7d88c6142c6efc160c0ee5e4f85cde382c072888
No security impact per upstream assessment