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Fencer Vulns
medium 5.0

CVE-2009-1374 json

Buffer overflow in the decrypt_out function in Pidgin (formerly Gaim) before 2.5.6 allows remote attackers to cause a denial of service (ap…

published 2009-05-26 17 y ago modified 2026-06-16 4 mo ago also EUVD-2009-1372

cvss
5.0
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.5%
EPSS 2.5% chance of exploitation in 30 days, percentile 85%
public exploits
0
none known

Summary

Buffer overflow in the decrypt_out function in Pidgin (formerly Gaim) before 2.5.6 allows remote attackers to cause a denial of service (application crash) via a QQ packet.

Patch / fix

  • pidgin Debian 14, Debian 13, Debian 12 2.5.6-1

debian advisories DEBIAN-CVE-2009-1374

  • pidgin RHEL 4 2.5.5-2.el4
  • pidgin RHEL 5 2.5.5-3.el5
  • finch RHEL 4 2.5.5-2.el4
  • finch RHEL 5 2.5.5-3.el5
  • libpurple RHEL 4 2.5.5-2.el4
  • libpurple RHEL 5 2.5.5-3.el5
  • pidgin-perl RHEL 4 2.5.5-2.el4
  • pidgin-perl RHEL 5 2.5.5-3.el5

red hat advisories RHSA-2009:1060

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2009-1374 updated cvss 5.0

pidgin DoS when decrypting qq packets

  • Red Hat Enterprise Linux AS version 4 finch 2.5.5-2.el4, pidgin 2.5.5-2.el4, libpurple 2.5.5-2.el4, pidgin-perl 2.5.5-2.el4, libpurple-tcl 2.5.5-2.el4, libpurple-perl 2.5.5-2.el4 Red Hat Enterprise Linux Desktop (v. 5 client) finch 2.5.5-3.el5, pidgin 2.5.5-3.el5, libpurple 2.5.5-3.el5, pidgin-perl 2.5.5-3.el5, libpurple-tcl 2.5.5-3.el5, libpurple-perl 2.5.5-3.el5 Red Hat Enterprise Linux Desktop version 4 finch 2.5.5-2.el4, pidgin 2.5.5-2.el4, libpurple 2.5.5-2.el4, pidgin-perl 2.5.5-2.el4, libpurple-tcl 2.5.5-2.el4, libpurple-perl 2.5.5-2.el4 Red Hat Enterprise Linux Desktop Workstation (v. 5 client) finch 2.5.5-3.el5, pidgin 2.5.5-3.el5, libpurple 2.5.5-3.el5, pidgin-perl 2.5.5-3.el5, libpurple-tcl 2.5.5-3.el5, libpurple-perl 2.5.5-3.el5 Red Hat Enterprise Linux ES version 4 finch 2.5.5-2.el4, pidgin 2.5.5-2.el4, libpurple 2.5.5-2.el4, pidgin-perl 2.5.5-2.el4, libpurple-tcl 2.5.5-2.el4, libpurple-perl 2.5.5-2.el4 Red Hat Enterprise Linux WS version 4 finch 2.5.5-2.el4, pidgin 2.5.5-2.el4, libpurple 2.5.5-2.el4, pidgin-perl 2.5.5-2.el4, libpurple-tcl 2.5.5-2.el4, libpurple-perl 2.5.5-2.el4
    fixed: vendor fix RHSA-2009:1060

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

2.54% chance of exploitation in the next 30 days, higher than 85% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

Classification

Weakness
  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.