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Fencer Intel
medium 4.3

CVE-2010-0420 json

libpurple in Finch in Pidgin before 2.6.6, when an XMPP multi-user chat (MUC) room is used, does not properly parse nicknames containing <b…

published 16y ago modified 4mo ago also EUVD-2010-0451

cvss
4.3
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.9%
EPSS 2.9% chance of exploitation in 30 days, percentile 86%
public exploits
0
none known

Summary

libpurple in Finch in Pidgin before 2.6.6, when an XMPP multi-user chat (MUC) room is used, does not properly parse nicknames containing <br> sequences, which allows remote attackers to cause a denial of service (application crash) via a crafted nickname.

Patch / fix

  • pidgin Debian 14, Debian 13, Debian 12 2.6.6-1

debian advisories DEBIAN-CVE-2010-0420

  • pidgin RHEL 4 2.6.6-1.el4
  • pidgin RHEL 5 PRODUCTIVITY, RHEL 5 2.6.6-1.el5
  • finch RHEL 4 2.6.6-1.el4
  • finch RHEL 5 PRODUCTIVITY, RHEL 5 2.6.6-1.el5
  • libpurple RHEL 4 2.6.6-1.el4
  • libpurple RHEL 5 PRODUCTIVITY, RHEL 5 2.6.6-1.el5
  • pidgin-perl RHEL 4 2.6.6-1.el4
  • pidgin-perl RHEL 5 PRODUCTIVITY, RHEL 5 2.6.6-1.el5

red hat advisories RHSA-2010:0115

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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-2010-0420 updated cvss 4.3

pidgin: Finch XMPP MUC Crash

  • Red Hat Enterprise Linux AS version 4 finch 2.6.6-1.el4, pidgin 2.6.6-1.el4, libpurple 2.6.6-1.el4, pidgin-perl 2.6.6-1.el4, libpurple-tcl 2.6.6-1.el4, libpurple-perl 2.6.6-1.el4 Red Hat Enterprise Linux Desktop (v. 5 client) finch 2.6.6-1.el5, pidgin 2.6.6-1.el5, libpurple 2.6.6-1.el5, pidgin-perl 2.6.6-1.el5, libpurple-tcl 2.6.6-1.el5, libpurple-perl 2.6.6-1.el5 Red Hat Enterprise Linux Desktop version 4 finch 2.6.6-1.el4, pidgin 2.6.6-1.el4, libpurple 2.6.6-1.el4, pidgin-perl 2.6.6-1.el4, libpurple-tcl 2.6.6-1.el4, libpurple-perl 2.6.6-1.el4 Red Hat Enterprise Linux Desktop Workstation (v. 5 client) finch 2.6.6-1.el5, pidgin 2.6.6-1.el5, libpurple 2.6.6-1.el5, pidgin-perl 2.6.6-1.el5, libpurple-tcl 2.6.6-1.el5, libpurple-perl 2.6.6-1.el5 Red Hat Enterprise Linux ES version 4 finch 2.6.6-1.el4, pidgin 2.6.6-1.el4, libpurple 2.6.6-1.el4, pidgin-perl 2.6.6-1.el4, libpurple-tcl 2.6.6-1.el4, libpurple-perl 2.6.6-1.el4 Red Hat Enterprise Linux Optional Productivity Applications (v. 5 server) finch 2.6.6-1.el5, pidgin 2.6.6-1.el5, libpurple 2.6.6-1.el5, pidgin-perl 2.6.6-1.el5, libpurple-tcl 2.6.6-1.el5, libpurple-perl 2.6.6-1.el5
    +1 more products
    Red Hat Enterprise Linux WS version 4 finch 2.6.6-1.el4, pidgin 2.6.6-1.el4, libpurple 2.6.6-1.el4, pidgin-perl 2.6.6-1.el4, libpurple-tcl 2.6.6-1.el4, libpurple-perl 2.6.6-1.el4
    fixed: vendor fix RHSA-2010:0115

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

2.86% chance of exploitation in the next 30 days, higher than 86% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:N/A:P

Classification

Weakness
  • CWE-20 Improper Input Validation

References

Sources

Fencer Intel 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.