Description
The msn_emoticon_msg function in slp.c in the MSN protocol plugin in libpurple in Pidgin before 2.7.0 allows remote authenticated users to cause a denial of service (NULL pointer dereference and application crash) via a custom emoticon in a malformed SLP message.
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 | pidgin | 2.7.0-1 | — |
| Debian 13 | pidgin | 2.7.0-1 | — |
| Debian 12 | pidgin | 2.7.0-1 | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 5 | finch +8 | 2.6.6-5.el5_5 | RHSA-2010:0788 |
| RHEL 4 | finch +8 | 2.6.6-5.el4_8 | RHSA-2010:0788 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Rhel Productivity 5 | finch +8 | 2.6.6-5.el5_5 | RHSA-2010:0788 |
Advisories 1
- RHSA-2010:0788 Red Hat Security Advisory: pidgin security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
References
- RHSA-2010:0788 vendor-advisory
- 40138 vdb-entry
- MDVSA-2010:097 vendor-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=589973
- 39801 third-party-advisory
- USN-1014-1 vendor-advisory
- http://developer.pidgin.im/viewmtn/revision/info/894460d22c434e73d60b71ec031611988e687c8b
- ADV-2010-1141 vdb-entry
- pidgin-slp-packets-dos(58559) vdb-entry
- http://www.pidgin.im/news/security/index.php?id=46
- oval:org.mitre.oval:def:18547 vdb-entry signature
- 41899 third-party-advisory
- ADV-2010-2755 vdb-entry
- http://developer.pidgin.im/viewmtn/revision/diff/884d44222e8c81ecec51c25e07d005e002a5479b/with/894460d22c434e73d60b71ec031611988e687c8b/libpurple/protocols/msn/slp.c