Description
In libosip2 in GNU oSIP 4.1.0, a malformed SIP message can lead to a heap buffer overflow in the _osip_message_to_str() function defined in osipparser2/osip_message_to_str.c, resulting in a remote DoS.
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 | libosip2 | 4.1.0-2.1 | — |
| Debian 13 | libosip2 | 4.1.0-2.1 | — |
| Debian 12 | libosip2 | 4.1.0-2.1 | — |
| Debian 8 | libosip2 | 4.1.0-2+deb8u1 | DSA-3879-1 |
| Debian 7 | libosip2 | 3.6.0-4+deb7u1 | DLA-898-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | libosip2 | 4.1.0-2+deb8u1build0.16.04.1 | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP2 | libosip2 | 3.5.0-20.1 | SUSE-SU-2017:1187-1 |
| SLES 12 SP1 | libosip2 | 3.5.0-20.1 | SUSE-SU-2017:1187-1 |
| SLES 11 SP4 | libosip2 | 3.1.0-3.1 | SUSE-SU-2017:1188-1 |
Advisories 4
- DLA-898-1 libosip2 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-3879-1 libosip2 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2017:1187-1 Security update for libosip2 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:1188-1 Security update for libosip2 SUSE / openSUSE Security Updates · May 2, 2025
References
- DSA-3879 vendor-advisory
- 92921 vdb-entry
- https://savannah.gnu.org/support/index.php?109131