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TI-2011-02595 Aliases CVE-2011-2943GHSA-39wr-cgvv-f2w7

The irc_msg_who function in msgs.c in the IRC protocol plugin in libpurple 2.8.0 through…

Priority LOW 26Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
— Not recorded in CVSS 2.0
Attack complexity
Medium
Impact type
—
Confidentiality · integrity · availability
None · None · Partial
Fix status
No fix listed

Attack profile from CVSS 2.0 · NVD. Fix status from CNA.

Summary

The irc_msg_who function in msgs.c in the IRC protocol plugin in libpurple 2.8.0 through 2.9.0 in Pidgin before 2.10.0 does not properly validate characters in nicknames, which allows user-assisted remote attackers to cause a denial of service (NULL pointer dereference and application crash) via a crafted nickname that is not properly handled in a WHO response.

Why it matters now

EPSS 0.03596 89th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 46

CPEVersionsRoleVendor
cpe:2.3:a:pidgin:libpurple:2.8.0:*:*:*:*:*:*:*2.8.0VulnerablePidgin
cpe:2.3:a:pidgin:libpurple:2.9.0:*:*:*:*:*:*:*2.9.0VulnerablePidgin
cpe:2.3:a:pidgin:pidgin:*:*:*:*:*:*:*:*up to 2.9.0VulnerablePidgin
cpe:2.3:a:pidgin:pidgin:2.0.0:*:*:*:*:*:*:*2.0.0VulnerablePidgin
cpe:2.3:a:pidgin:pidgin:2.0.1:*:*:*:*:*:*:*2.0.1VulnerablePidgin
cpe:2.3:a:pidgin:pidgin:2.0.2:*:*:*:*:*:*:*2.0.2VulnerablePidgin
cpe:2.3:a:pidgin:pidgin:2.1.0:*:*:*:*:*:*:*2.1.0VulnerablePidgin
cpe:2.3:a:pidgin:pidgin:2.1.1:*:*:*:*:*:*:*2.1.1VulnerablePidgin
cpe:2.3:a:pidgin:pidgin:2.2.0:*:*:*:*:*:*:*2.2.0VulnerablePidgin
cpe:2.3:a:pidgin:pidgin:2.2.1:*:*:*:*:*:*:*2.2.1VulnerablePidgin
  • cpe:2.3:a:pidgin:libpurple:2.8.0:*:*:*:*:*:*:* Versions 2.8.0 Vulnerable ·Pidgin
  • cpe:2.3:a:pidgin:libpurple:2.9.0:*:*:*:*:*:*:* Versions 2.9.0 Vulnerable ·Pidgin
  • cpe:2.3:a:pidgin:pidgin:*:*:*:*:*:*:*:* Versions up to 2.9.0 Vulnerable ·Pidgin
  • cpe:2.3:a:pidgin:pidgin:2.0.0:*:*:*:*:*:*:* Versions 2.0.0 Vulnerable ·Pidgin
  • cpe:2.3:a:pidgin:pidgin:2.0.1:*:*:*:*:*:*:* Versions 2.0.1 Vulnerable ·Pidgin
  • cpe:2.3:a:pidgin:pidgin:2.0.2:*:*:*:*:*:*:* Versions 2.0.2 Vulnerable ·Pidgin
  • cpe:2.3:a:pidgin:pidgin:2.1.0:*:*:*:*:*:*:* Versions 2.1.0 Vulnerable ·Pidgin
  • cpe:2.3:a:pidgin:pidgin:2.1.1:*:*:*:*:*:*:* Versions 2.1.1 Vulnerable ·Pidgin
  • cpe:2.3:a:pidgin:pidgin:2.2.0:*:*:*:*:*:*:* Versions 2.2.0 Vulnerable ·Pidgin
  • cpe:2.3:a:pidgin:pidgin:2.2.1:*:*:*:*:*:*:* Versions 2.2.1 Vulnerable ·Pidgin
Show 36 more CPE
CPEVersionsRoleVendor
cpe:2.3:a:pidgin:pidgin:2.2.2:*:*:*:*:*:*:*2.2.2VulnerablePidgin
cpe:2.3:a:pidgin:pidgin:2.3.0:*:*:*:*:*:*:*2.3.0VulnerablePidgin
cpe:2.3:a:pidgin:pidgin:2.3.1:*:*:*:*:*:*:*2.3.1VulnerablePidgin
cpe:2.3:a:pidgin:pidgin:2.4.0:*:*:*:*:*:*:*2.4.0VulnerablePidgin
cpe:2.3:a:pidgin:pidgin:2.4.1:*:*:*:*:*:*:*2.4.1VulnerablePidgin
cpe:2.3:a:pidgin:pidgin:2.4.2:*:*:*:*:*:*:*2.4.2VulnerablePidgin
cpe:2.3:a:pidgin:pidgin:2.4.3:*:*:*:*:*:*:*2.4.3VulnerablePidgin
cpe:2.3:a:pidgin:pidgin:2.5.0:*:*:*:*:*:*:*2.5.0VulnerablePidgin
cpe:2.3:a:pidgin:pidgin:2.5.1:*:*:*:*:*:*:*2.5.1VulnerablePidgin
cpe:2.3:a:pidgin:pidgin:2.5.2:*:*:*:*:*:*:*2.5.2VulnerablePidgin
cpe:2.3:a:pidgin:pidgin:2.5.3:*:*:*:*:*:*:*2.5.3VulnerablePidgin
cpe:2.3:a:pidgin:pidgin:2.5.4:*:*:*:*:*:*:*2.5.4VulnerablePidgin
cpe:2.3:a:pidgin:pidgin:2.5.5:*:*:*:*:*:*:*2.5.5VulnerablePidgin
cpe:2.3:a:pidgin:pidgin:2.5.6:*:*:*:*:*:*:*2.5.6VulnerablePidgin
cpe:2.3:a:pidgin:pidgin:2.5.7:*:*:*:*:*:*:*2.5.7VulnerablePidgin
cpe:2.3:a:pidgin:pidgin:2.5.8:*:*:*:*:*:*:*2.5.8VulnerablePidgin
cpe:2.3:a:pidgin:pidgin:2.5.9:*:*:*:*:*:*:*2.5.9VulnerablePidgin
cpe:2.3:a:pidgin:pidgin:2.6.0:*:*:*:*:*:*:*2.6.0VulnerablePidgin
cpe:2.3:a:pidgin:pidgin:2.6.1:*:*:*:*:*:*:*2.6.1VulnerablePidgin
cpe:2.3:a:pidgin:pidgin:2.6.2:*:*:*:*:*:*:*2.6.2VulnerablePidgin
cpe:2.3:a:pidgin:pidgin:2.6.4:*:*:*:*:*:*:*2.6.4VulnerablePidgin
cpe:2.3:a:pidgin:pidgin:2.6.5:*:*:*:*:*:*:*2.6.5VulnerablePidgin
cpe:2.3:a:pidgin:pidgin:2.6.6:*:*:*:*:*:*:*2.6.6VulnerablePidgin
cpe:2.3:a:pidgin:pidgin:2.7.0:*:*:*:*:*:*:*2.7.0VulnerablePidgin
cpe:2.3:a:pidgin:pidgin:2.7.1:*:*:*:*:*:*:*2.7.1VulnerablePidgin
cpe:2.3:a:pidgin:pidgin:2.7.2:*:*:*:*:*:*:*2.7.2VulnerablePidgin
cpe:2.3:a:pidgin:pidgin:2.7.3:*:*:*:*:*:*:*2.7.3VulnerablePidgin
cpe:2.3:a:pidgin:pidgin:2.7.4:*:*:*:*:*:*:*2.7.4VulnerablePidgin
cpe:2.3:a:pidgin:pidgin:2.7.5:*:*:*:*:*:*:*2.7.5VulnerablePidgin
cpe:2.3:a:pidgin:pidgin:2.7.6:*:*:*:*:*:*:*2.7.6VulnerablePidgin
cpe:2.3:a:pidgin:pidgin:2.7.7:*:*:*:*:*:*:*2.7.7VulnerablePidgin
cpe:2.3:a:pidgin:pidgin:2.7.8:*:*:*:*:*:*:*2.7.8VulnerablePidgin
cpe:2.3:a:pidgin:pidgin:2.7.9:*:*:*:*:*:*:*2.7.9VulnerablePidgin
cpe:2.3:a:pidgin:pidgin:2.7.10:*:*:*:*:*:*:*2.7.10VulnerablePidgin
cpe:2.3:a:pidgin:pidgin:2.7.11:*:*:*:*:*:*:*2.7.11VulnerablePidgin
cpe:2.3:a:pidgin:pidgin:2.8.0:*:*:*:*:*:*:*2.8.0VulnerablePidgin
  • cpe:2.3:a:pidgin:pidgin:2.2.2:*:*:*:*:*:*:* Versions 2.2.2 Vulnerable ·Pidgin
  • cpe:2.3:a:pidgin:pidgin:2.3.0:*:*:*:*:*:*:* Versions 2.3.0 Vulnerable ·Pidgin
  • cpe:2.3:a:pidgin:pidgin:2.3.1:*:*:*:*:*:*:* Versions 2.3.1 Vulnerable ·Pidgin
  • cpe:2.3:a:pidgin:pidgin:2.4.0:*:*:*:*:*:*:* Versions 2.4.0 Vulnerable ·Pidgin
  • cpe:2.3:a:pidgin:pidgin:2.4.1:*:*:*:*:*:*:* Versions 2.4.1 Vulnerable ·Pidgin
  • cpe:2.3:a:pidgin:pidgin:2.4.2:*:*:*:*:*:*:* Versions 2.4.2 Vulnerable ·Pidgin
  • cpe:2.3:a:pidgin:pidgin:2.4.3:*:*:*:*:*:*:* Versions 2.4.3 Vulnerable ·Pidgin
  • cpe:2.3:a:pidgin:pidgin:2.5.0:*:*:*:*:*:*:* Versions 2.5.0 Vulnerable ·Pidgin
  • cpe:2.3:a:pidgin:pidgin:2.5.1:*:*:*:*:*:*:* Versions 2.5.1 Vulnerable ·Pidgin
  • cpe:2.3:a:pidgin:pidgin:2.5.2:*:*:*:*:*:*:* Versions 2.5.2 Vulnerable ·Pidgin
  • cpe:2.3:a:pidgin:pidgin:2.5.3:*:*:*:*:*:*:* Versions 2.5.3 Vulnerable ·Pidgin
  • cpe:2.3:a:pidgin:pidgin:2.5.4:*:*:*:*:*:*:* Versions 2.5.4 Vulnerable ·Pidgin
  • cpe:2.3:a:pidgin:pidgin:2.5.5:*:*:*:*:*:*:* Versions 2.5.5 Vulnerable ·Pidgin
  • cpe:2.3:a:pidgin:pidgin:2.5.6:*:*:*:*:*:*:* Versions 2.5.6 Vulnerable ·Pidgin
  • cpe:2.3:a:pidgin:pidgin:2.5.7:*:*:*:*:*:*:* Versions 2.5.7 Vulnerable ·Pidgin
  • cpe:2.3:a:pidgin:pidgin:2.5.8:*:*:*:*:*:*:* Versions 2.5.8 Vulnerable ·Pidgin
  • cpe:2.3:a:pidgin:pidgin:2.5.9:*:*:*:*:*:*:* Versions 2.5.9 Vulnerable ·Pidgin
  • cpe:2.3:a:pidgin:pidgin:2.6.0:*:*:*:*:*:*:* Versions 2.6.0 Vulnerable ·Pidgin
  • cpe:2.3:a:pidgin:pidgin:2.6.1:*:*:*:*:*:*:* Versions 2.6.1 Vulnerable ·Pidgin
  • cpe:2.3:a:pidgin:pidgin:2.6.2:*:*:*:*:*:*:* Versions 2.6.2 Vulnerable ·Pidgin
  • cpe:2.3:a:pidgin:pidgin:2.6.4:*:*:*:*:*:*:* Versions 2.6.4 Vulnerable ·Pidgin
  • cpe:2.3:a:pidgin:pidgin:2.6.5:*:*:*:*:*:*:* Versions 2.6.5 Vulnerable ·Pidgin
  • cpe:2.3:a:pidgin:pidgin:2.6.6:*:*:*:*:*:*:* Versions 2.6.6 Vulnerable ·Pidgin
  • cpe:2.3:a:pidgin:pidgin:2.7.0:*:*:*:*:*:*:* Versions 2.7.0 Vulnerable ·Pidgin
  • cpe:2.3:a:pidgin:pidgin:2.7.1:*:*:*:*:*:*:* Versions 2.7.1 Vulnerable ·Pidgin
  • cpe:2.3:a:pidgin:pidgin:2.7.2:*:*:*:*:*:*:* Versions 2.7.2 Vulnerable ·Pidgin
  • cpe:2.3:a:pidgin:pidgin:2.7.3:*:*:*:*:*:*:* Versions 2.7.3 Vulnerable ·Pidgin
  • cpe:2.3:a:pidgin:pidgin:2.7.4:*:*:*:*:*:*:* Versions 2.7.4 Vulnerable ·Pidgin
  • cpe:2.3:a:pidgin:pidgin:2.7.5:*:*:*:*:*:*:* Versions 2.7.5 Vulnerable ·Pidgin
  • cpe:2.3:a:pidgin:pidgin:2.7.6:*:*:*:*:*:*:* Versions 2.7.6 Vulnerable ·Pidgin
  • cpe:2.3:a:pidgin:pidgin:2.7.7:*:*:*:*:*:*:* Versions 2.7.7 Vulnerable ·Pidgin
  • cpe:2.3:a:pidgin:pidgin:2.7.8:*:*:*:*:*:*:* Versions 2.7.8 Vulnerable ·Pidgin
  • cpe:2.3:a:pidgin:pidgin:2.7.9:*:*:*:*:*:*:* Versions 2.7.9 Vulnerable ·Pidgin
  • cpe:2.3:a:pidgin:pidgin:2.7.10:*:*:*:*:*:*:* Versions 2.7.10 Vulnerable ·Pidgin
  • cpe:2.3:a:pidgin:pidgin:2.7.11:*:*:*:*:*:*:* Versions 2.7.11 Vulnerable ·Pidgin
  • cpe:2.3:a:pidgin:pidgin:2.8.0:*:*:*:*:*:*:* Versions 2.8.0 Vulnerable ·Pidgin

Remediation

No fixed version listed by the sources yet.

Vendor assessments

Red Hat

Red Hat rating: Low. Red Hat's page for this CVE →

Not affected: 3 products
  • Red Hat Enterprise Linux 4
  • Red Hat Enterprise Linux 5
  • Red Hat Enterprise Linux 6

Timeline

  1. 2026-10-02 Threatist record created from CVE-2011-2943
  2. 2026-10-03 Alias added: GHSA-39wr-cgvv-f2w7

References

Patch 3

Other 4

  • TI-2009-02939 The msn_slp_process_msg function in libpurple/protocols/msn/slpcall.c in the MSN protocol… CVSS 2.0MEDIUM 5.0
  • TI-2009-02938 The msn_slp_sip_recv function in libpurple/protocols/msn/slp.c in the MSN protocol plugin… CVSS 2.0MEDIUM 5.0
  • TI-2009-02585 libpurple/protocols/irc/msgs.c in the IRC protocol plugin in libpurple in Pidgin before… CVSS 2.0MEDIUM 5.0
  • TI-2011-03169 The g_markup_escape_text function in the SILC protocol plug-in in libpurple 2.10.0 and… CVSS 2.0MEDIUM 4.3
  • TI-2009-02940 The XMPP protocol plugin in libpurple in Pidgin before 2.6.2 does not properly handle an… CVSS 2.0MEDIUM 5.0
  • TI-2010-04258 directconn.c in the MSN protocol plugin in libpurple 2.7.6 through 2.7.8 in Pidgin before… CVSS 2.0MEDIUM 4.0

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences