CVE-2021-43396 Affecting glibc package, versions <2.31-13+deb11u3
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Test your applications- Snyk ID SNYK-DEBIAN11-GLIBC-1911968
- published 5 Nov 2021
- disclosed 4 Nov 2021
Introduced: 4 Nov 2021
CVE-2021-43396 Open this link in a new tabHow to fix?
Upgrade Debian:11 glibc to version 2.31-13+deb11u3 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream glibc package and not the glibc package as distributed by Debian.
See How to fix? for Debian:11 relevant fixed versions and status.
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.
References
- https://security-tracker.debian.org/tracker/CVE-2021-43396
- https://sourceware.org/bugzilla/show_bug.cgi?id=28524
- https://blog.tuxcare.com/vulnerability/vulnerability-in-iconv-identified-by-tuxcare-team-cve-2021-43396
- https://sourceware.org/git/?p=glibc.git;a=commit;h=ff012870b2c02a62598c04daa1e54632e020fd7d
- https://www.oracle.com/security-alerts/cpujul2022.html
- https://sourceware.org/git/?p=glibc.git%3Ba=commit%3Bh=ff012870b2c02a62598c04daa1e54632e020fd7d