Description
The NSS plugin in libpurple in Pidgin 2.4.3 does not verify SSL certificates, which makes it easier for remote attackers to trick a user into accepting an invalid server certificate for a spoofed service.
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 | 2.4.3-2 | — |
| Debian 13 | pidgin | 2.4.3-2 | — |
| Debian 12 | pidgin | 2.4.3-2 | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 5 | finch +8 | 2.5.2-6.el5 | RHSA-2008:1023 |
| RHEL 4 | finch +8 | 2.5.2-6.el4 | RHSA-2008:1023 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Rhel Productivity 5 | finch +8 | 2.5.2-6.el5 | RHSA-2008:1023 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | pidgin | 2.14.7-1.1 | openSUSE-SU-2024:11172-1 |
Advisories 2
- RHSA-2008:1023 Red Hat Security Advisory: pidgin security and bug fix update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- openSUSE-SU-2024:11172-1 finch-2.14.7-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
References
- http://developer.pidgin.im/attachment/ticket/6500/nss-cert-verify.patch
- oval:org.mitre.oval:def:18327 vdb-entry signature
- MDVSA-2009:025 vendor-advisory
- 31390 third-party-advisory
- ADV-2008-2318 vdb-entry
- http://support.avaya.com/elmodocs2/security/ASA-2008-493.htm
- http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=492434
- 33102 third-party-advisory
- USN-675-1 vendor-advisory
- http://developer.pidgin.im/attachment/ticket/6500/nss_add_rev.patch
- 32859 third-party-advisory
- http://developer.pidgin.im/ticket/6500
- pidgin-ssl-spoofing(44220) vdb-entry
- RHSA-2008:1023 vendor-advisory
- oval:org.mitre.oval:def:10979 vdb-entry signature
- 30553 vdb-entry