glibc: CVE-2021-43396: Conversion from ISO-2022-JP-3 with iconv may emit spurious NUL character on state reset

Debian Bug report logs - #998622
glibc: CVE-2021-43396: Conversion from ISO-2022-JP-3 with iconv may emit spurious NUL character on state reset

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Message #5 received at submit@bugs.debian.org (full text, mbox, reply):

From: Salvatore Bonaccorso <carnil@debian.org>

To: Debian Bug Tracking System <submit@bugs.debian.org>

Subject: glibc: CVE-2021-43396: Conversion from ISO-2022-JP-3 with iconv may emit spurious NUL character on state reset

Date: Fri, 05 Nov 2021 06:53:51 +0100

Source: glibc
Version: 2.31-10
Severity: important
Tags: security upstream
Forwarded: https://sourceware.org/bugzilla/show_bug.cgi?id=28524
X-Debbugs-Cc: carnil@debian.org, Debian Security Team <team@security.debian.org>

Hi,

The following vulnerability was published for glibc.

CVE-2021-43396[0]:
| 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.


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-2021-43396
    https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-43396
[1] https://sourceware.org/bugzilla/show_bug.cgi?id=28524

Regards,
Salvatore

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