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.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2021-43396
Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2021-43396.html
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| arch | fixed | 2.34-1 | |
| sles | affected | | |
| debian | bookworm | fixed | 2.32-5 |
| debian | bullseye | fixed | 2.31-13+deb11u3 |
| debian | forky | fixed | 2.32-5 |
| debian | sid | fixed | 2.32-5 |
| debian | trixie | fixed | 2.32-5 |
References
Verify integrity in audit chain (admin only). AS-IS.