Description
Multiple stack-based buffer overflows in the (1) conv_jistoeuc, (2) conv_euctojis, and (3) conv_sjistoeuc functions in codeconv.c in Claws Mail before 3.13.1 allow remote attackers to have unspecified impact via a crafted email, involving Japanese character set conversion.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | claws-mail | 3.13.1-1 | — |
| Debian 14 | macopix | 1.7.4-6 | — |
| Debian 13 | claws-mail | 3.13.1-1 | — |
| Debian 13 | macopix | 1.7.4-6 | — |
| Debian 12 | claws-mail | 3.13.1-1 | — |
| Debian 12 | macopix | 1.7.4-6 | — |
| Debian 8 | claws-mail | 3.11.1-3+deb8u1 | DSA-3452-1 |
| Debian 7 | claws-mail | 3.8.1-2+deb7u1 | DSA-3452-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 6.0 | claws-mail | 3.7.6-4+squeeze2 | DLA-383-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | macopix | No fix yet | — |
Advisories 2
- DSA-3452-1 claws-mail - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-383-1 claws-mail - security update Debian Security (DSA / DLA) · Mar 9, 2026
References
- http://www.claws-mail.org/news.php
- GLSA-201606-11 vendor-advisory
- [oss-security] 20151221 Re: mail-client/claws-mail-3.13.1: Stack Overflow - CVE needed? mailing-list
- openSUSE-SU-2016:0002 vendor-advisory
- DSA-3452 vendor-advisory
- http://www.thewildbeast.co.uk/claws-mail/bugzilla/show_bug.cgi?id=3557
- http://git.claws-mail.org/?p=claws.git%3Ba=commit%3Bh=d390fa07f5548f3173dd9cc13b233db5ce934c82
- [oss-security] 20151221 mail-client/claws-mail-3.13.1: Stack Overflow - CVE needed? mailing-list