Read the docs
TI-2011-00944 Aliases CVE-2011-1091GHSA-784h-wwvm-3rvx

libymsg.c in the Yahoo! protocol plugin in libpurple in Pidgin 2.6.0 through 2.7.10…

Priority LOW 24Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
— Not recorded in CVSS 2.0
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · None · Partial
Fix status
Fixed

Attack profile from CVSS 2.0 · NVD. Fix status from CNA and Red Hat.

Summary

libymsg.c in the Yahoo! protocol plugin in libpurple in Pidgin 2.6.0 through 2.7.10 allows (1) remote authenticated users to cause a denial of service (NULL pointer dereference and application crash) via a malformed YMSG notification packet, and allows (2) remote Yahoo! servers to cause a denial of service (NULL pointer dereference and application crash) via a malformed YMSG SMS message.

Why it matters now

EPSS 0.02639 85th percentileScored 2026-11-07
Fix Fixed Red Hat: 2 advisories

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 · 17

CPEVersionsRoleVendor
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:2.6.0:*:*:*:*:*:*:* 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
Show 7 more CPE
CPEVersionsRoleVendor
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:2.7.4:*:*:*:*:*:*:* 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

Remediation

Red Hat 2 advisories

  • RHSA-2011:1371 Released 2011-10-14 · Red Hat rating Moderate
    pidgin security update
    • RHEL Desktop Workstation (v. 5 client) finch-devel-2.6.6-5.el5_7.1, finch-devel-2.6.6-5.el5_7.1.i386, libpurple-devel-2.6.6-5.el5_7.1 +4
    • RHEL Optional Productivity Applications (v. 5 server) finch-2.6.6-5.el5_7.1, finch-2.6.6-5.el5_7.1.i386, finch-devel-2.6.6-5.el5_7.1 +15
    • Red Hat Enterprise Linux AS version 4 finch-2.6.6-7.el4, finch-2.6.6-7.el4.i386, finch-2.6.6-7.el4.ia64 +33
    • Red Hat Enterprise Linux Desktop (v. 5 client) finch-2.6.6-5.el5_7.1, finch-2.6.6-5.el5_7.1.i386, libpurple-2.6.6-5.el5_7.1 +9
    • Red Hat Enterprise Linux Desktop version 4 finch-2.6.6-7.el4, finch-2.6.6-7.el4.i386, finch-devel-2.6.6-7.el4 +15
    • Red Hat Enterprise Linux ES version 4 finch-2.6.6-7.el4, finch-2.6.6-7.el4.i386, finch-2.6.6-7.el4.ia64 +24
    • Red Hat Enterprise Linux WS version 4 finch-2.6.6-7.el4, finch-2.6.6-7.el4.i386, finch-2.6.6-7.el4.ia64 +24
  • RHSA-2011:0616 Released 2011-05-19 · Red Hat rating Low
    pidgin security and bug fix update
    • Red Hat Enterprise Linux Desktop (v. 6) libpurple-2.7.9-3.el6, pidgin-2.7.9-3.el6
    • Red Hat Enterprise Linux Desktop Optional (v. 6) finch-2.7.9-3.el6, finch-devel-2.7.9-3.el6, libpurple-devel-2.7.9-3.el6 +6
    • Red Hat Enterprise Linux Server Optional (v. 6) finch-2.7.9-3.el6, finch-2.7.9-3.el6.ppc, finch-devel-2.7.9-3.el6 +12
    • Red Hat Enterprise Linux Workstation (v. 6) libpurple-2.7.9-3.el6, pidgin-2.7.9-3.el6
    • Red Hat Enterprise Linux Workstation Optional (v. 6) finch-2.7.9-3.el6, finch-devel-2.7.9-3.el6, libpurple-devel-2.7.9-3.el6 +6

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
RHEL Desktop Workstation (v. 5 client)Fixed RHSA-2011:1371
RHEL Optional Productivity Applications (v. 5 server)Fixed RHSA-2011:1371
Red Hat Enterprise Linux AS version 4Fixed RHSA-2011:1371
Red Hat Enterprise Linux Desktop (v. 5 client)Fixed RHSA-2011:1371
Red Hat Enterprise Linux Desktop (v. 6)Fixed RHSA-2011:0616
Red Hat Enterprise Linux Desktop Optional (v. 6)Fixed RHSA-2011:0616
Red Hat Enterprise Linux Desktop version 4Fixed RHSA-2011:1371
Red Hat Enterprise Linux ES version 4Fixed RHSA-2011:1371
Red Hat Enterprise Linux Server Optional (v. 6)Fixed RHSA-2011:0616
Red Hat Enterprise Linux WS version 4Fixed RHSA-2011:1371
Red Hat Enterprise Linux Workstation (v. 6)Fixed RHSA-2011:0616
Red Hat Enterprise Linux Workstation Optional (v. 6)Fixed RHSA-2011:0616

Timeline

  1. 2026-10-02 Threatist record created from CVE-2011-1091
  2. 2026-10-03 Alias added: GHSA-784h-wwvm-3rvx

References

Patch 3

Advisory 6

Other 6

  • TI-2019-15597 Pidgin 2.13.0 Denial of Service via Malformed Username CVSS 4.0MEDIUM 6.9
  • TI-2009-02576 The msn_slplink_process_msg function in libpurple/protocols/msn/slplink.c in libpurple… CVSS 2.0HIGH 10.0
  • TI-2013-05439 The SIMPLE protocol functionality in Pidgin before 2.10.8 allows remote attackers to have… CVSS 2.0HIGH 10.0
  • TI-2009-01309 Multiple integer overflows in the msn_slplink_process_msg functions in the MSN protocol… CVSS 2.0HIGH 9.3
  • TI-2017-01890 Out-of-bounds write in pidgin CVSS 3.0CRITICAL 9.8
  • TI-2011-02815 gtkutils.c in Pidgin before 2.10.0 on Windows allows user-assisted remote attackers to… CVSS 2.0HIGH 9.3
See all 86 →

Sources

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