Description
The stringprep_utf8_to_ucs4 function in libin before 1.31, as used in jabberd2, allows context-dependent attackers to read system memory and possibly have other unspecified impact via invalid UTF-8 characters in a string, which triggers an out-of-bounds read.
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 | libidn | 1.31-1 | — |
| Debian 13 | libidn | 1.31-1 | — |
| Debian 12 | libidn | 1.31-1 | — |
| Debian 8 | libidn | 1.29-1+deb8u1 | DSA-3578-1 |
| Debian 7 | libidn | 1.25-2+deb7u1 | DLA-476-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 6.0 | libidn | 1.15-2+deb6u1 | DLA-277-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | libidn | 1.32-3ubuntu1.1 | USN-3068-1 |
| Ubuntu 14.04 LTS | libidn | 1.28-1ubuntu2.1 | USN-3068-1 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP1 | libidn | 1.28-4.1 | SUSE-SU-2016:2079-1 |
| SLES 12 SP1 | wget | 1.14-10.3 | SUSE-SU-2016:2226-1 |
| SLES 11 SP4 | libidn | 1.10-6.1 | SUSE-SU-2016:2291-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP1 | libidn | 1.28-4.1 | SUSE-SU-2016:2079-1 |
| SLES for SAP 12 SP1 | wget | 1.14-10.3 | SUSE-SU-2016:2226-1 |
| SLES for SAP 11 SP4 | libidn | 1.10-6.1 | SUSE-SU-2016:2291-1 |
Advisories 7
- USN-3068-1 libidn vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DLA-476-1 libidn - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-3578-1 libidn - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-277-1 libidn - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2016:2291-1 Security update for libidn SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:2226-1 Security update for wget SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:2079-1 Security update for libidn SUSE / openSUSE Security Updates · Feb 4, 2026
References
- FEDORA-2015-11621 vendor-advisory
- DSA-3578 vendor-advisory
- openSUSE-SU-2015:1261 vendor-advisory
- https://github.com/jabberd2/jabberd2/issues/85
- openSUSE-SU-2016:2135 vendor-advisory
- FEDORA-2015-11562 vendor-advisory
- 72736 vdb-entry
- [oss-security] 20150223 Re: CVE Request: jabberd remote information disclosure mailing-list
- http://git.savannah.gnu.org/cgit/libidn.git/commit/?id=2e97c279
- USN-3068-1 vendor-advisory