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TI-2019-15597 Aliases CVE-2019-25544GHSA-hvgh-8gm9-9vq2

Pidgin 2.13.0 Denial of Service via Malformed Username

Priority MEDIUM 64CWE-807Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
None · None · High
Fix status
Deferred Red Hat: fix deferred

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat.

Summary

Pidgin 2.13.0 contains a denial of service vulnerability that allows local attackers to crash the application by providing an excessively long username string during account creation. Attackers can input a buffer of 1000 characters in the username field and trigger a crash when joining a chat, causing the application to become unavailable.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00199 9th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA and NVD
Fix Deferred Red Hat: fix deferred

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
PidginPidgin2.13.0—No fix listedCNA
  • Pidgin VendorPidgin Affected 2.13.0 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:pidgin:pidgin:2.13.0:*:*:*:*:*:*:*2.13.0VulnerablePidgin
  • cpe:2.3:a:pidgin:pidgin:2.13.0:*:*:*:*:*:*:* Versions 2.13.0 Vulnerable ·Pidgin

Remediation

No fixed version listed by the sources yet.

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux 6AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 7AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux 8AffectedNo fix yet: Fix deferred

Timeline

  1. 2026-10-02 Threatist record created from CVE-2019-25544
  2. 2026-10-03 Alias added: GHSA-hvgh-8gm9-9vq2

References

Exploit 1

Other 1

  • 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
  • TI-2013-05436 gtkutils.c in Pidgin before 2.10.8 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