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Fencer Intel
medium 4.0

CVE-2010-3711 json

libpurple in Pidgin before 2.7.4 does not properly validate the return value of the purple_base64_decode function, which allows remote auth…

published 16y ago modified 4mo ago also EUVD-2010-3693

cvss
4.0
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
3.3%
EPSS 3.3% chance of exploitation in 30 days, percentile 88%
public exploits
0
none known

Summary

libpurple in Pidgin before 2.7.4 does not properly validate the return value of the purple_base64_decode function, which allows remote authenticated users to cause a denial of service (NULL pointer dereference and application crash) via a crafted message, related to the plugins for MSN, MySpaceIM, XMPP, and Yahoo! and the NTLM authentication support.

Patch / fix

  • pidgin Debian 14, Debian 13, Debian 12 2.7.4-1

debian advisories DEBIAN-CVE-2010-3711

  • pidgin RHEL 6 2.6.6-6.el6_0
  • finch RHEL 6 2.6.6-6.el6_0
  • libpurple RHEL 6 2.6.6-6.el6_0
  • pidgin-perl RHEL 6 2.6.6-6.el6_0
  • libpurple-tcl RHEL 6 2.6.6-6.el6_0
  • libpurple-perl RHEL 6 2.6.6-6.el6_0
  • pidgin RHEL 4 2.6.6-5.el4_8
  • pidgin RHEL 5 PRODUCTIVITY, RHEL 5 2.6.6-5.el5_5

red hat advisories RHSA-2010:0890RHSA-2010:0788

Is CVE-2010-3711 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

Check with Fencer

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-2010-3711 updated cvss 5.0

(libpurple): Multiple DoS (crash) flaws by processing of unsanitized Base64 decoder values

  • Red Hat Enterprise Linux AS version 4 finch 2.6.6-5.el4_8, pidgin 2.6.6-5.el4_8, libpurple 2.6.6-5.el4_8, pidgin-perl 2.6.6-5.el4_8, libpurple-tcl 2.6.6-5.el4_8, libpurple-perl 2.6.6-5.el4_8 Red Hat Enterprise Linux Desktop (v. 5 client) finch 2.6.6-5.el5_5, pidgin 2.6.6-5.el5_5, libpurple 2.6.6-5.el5_5, pidgin-perl 2.6.6-5.el5_5, libpurple-tcl 2.6.6-5.el5_5, libpurple-perl 2.6.6-5.el5_5
    fixed: vendor fix RHSA-2010:0788
  • Red Hat Enterprise Linux Desktop (v. 6) finch 2.6.6-6.el6_0, pidgin 2.6.6-6.el6_0, libpurple 2.6.6-6.el6_0, pidgin-perl 2.6.6-6.el6_0, libpurple-tcl 2.6.6-6.el6_0, libpurple-perl 2.6.6-6.el6_0 Red Hat Enterprise Linux Desktop Optional (v. 6) finch 2.6.6-6.el6_0, pidgin 2.6.6-6.el6_0, libpurple 2.6.6-6.el6_0, pidgin-perl 2.6.6-6.el6_0, libpurple-tcl 2.6.6-6.el6_0, libpurple-perl 2.6.6-6.el6_0
    fixed: vendor fix RHSA-2010:0890
  • Red Hat Enterprise Linux Desktop version 4 finch 2.6.6-5.el4_8, pidgin 2.6.6-5.el4_8, libpurple 2.6.6-5.el4_8, pidgin-perl 2.6.6-5.el4_8, libpurple-tcl 2.6.6-5.el4_8, libpurple-perl 2.6.6-5.el4_8 Red Hat Enterprise Linux Desktop Workstation (v. 5 client) finch 2.6.6-5.el5_5, pidgin 2.6.6-5.el5_5, libpurple 2.6.6-5.el5_5, pidgin-perl 2.6.6-5.el5_5, libpurple-tcl 2.6.6-5.el5_5, libpurple-perl 2.6.6-5.el5_5 Red Hat Enterprise Linux ES version 4 finch 2.6.6-5.el4_8, pidgin 2.6.6-5.el4_8, libpurple 2.6.6-5.el4_8, pidgin-perl 2.6.6-5.el4_8, libpurple-tcl 2.6.6-5.el4_8, libpurple-perl 2.6.6-5.el4_8 Red Hat Enterprise Linux Optional Productivity Applications (v. 5 server) finch 2.6.6-5.el5_5, pidgin 2.6.6-5.el5_5, libpurple 2.6.6-5.el5_5, pidgin-perl 2.6.6-5.el5_5, libpurple-tcl 2.6.6-5.el5_5, libpurple-perl 2.6.6-5.el5_5
    fixed: vendor fix RHSA-2010:0788
  • Red Hat Enterprise Linux Server Optional (v. 6) finch 2.6.6-6.el6_0, pidgin 2.6.6-6.el6_0, libpurple 2.6.6-6.el6_0, pidgin-perl 2.6.6-6.el6_0, libpurple-tcl 2.6.6-6.el6_0, libpurple-perl 2.6.6-6.el6_0 Red Hat Enterprise Linux Workstation (v. 6) finch 2.6.6-6.el6_0, pidgin 2.6.6-6.el6_0, libpurple 2.6.6-6.el6_0, pidgin-perl 2.6.6-6.el6_0, libpurple-tcl 2.6.6-6.el6_0, libpurple-perl 2.6.6-6.el6_0 Red Hat Enterprise Linux Workstation Optional (v. 6) finch 2.6.6-6.el6_0, pidgin 2.6.6-6.el6_0, libpurple 2.6.6-6.el6_0, pidgin-perl 2.6.6-6.el6_0, libpurple-tcl 2.6.6-6.el6_0, libpurple-perl 2.6.6-6.el6_0
    fixed: vendor fix RHSA-2010:0890
  • Red Hat Enterprise Linux WS version 4 finch 2.6.6-5.el4_8, pidgin 2.6.6-5.el4_8, libpurple 2.6.6-5.el4_8, pidgin-perl 2.6.6-5.el4_8, libpurple-tcl 2.6.6-5.el4_8, libpurple-perl 2.6.6-5.el4_8
    fixed: vendor fix RHSA-2010:0788

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

3.27% chance of exploitation in the next 30 days, higher than 88% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 4.0 AV:N/AC:L/Au:S/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.