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Fencer Intel
high 7.6

CVE-2011-0020 in the critical feed json

Heap-based buffer overflow in the pango_ft2_font_render_box_glyph function in pango/pangoft2-render.c in libpango in Pango 1.28.3 and earli…

published 2011-01-24 15 y ago modified 2026-06-16 4 mo ago also EUVD-2011-0046

cvss
7.6
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
18.9%
EPSS 18.9% chance of exploitation in 30 days, percentile 97%
public exploits
1
Exploit-DB

Summary

Heap-based buffer overflow in the pango_ft2_font_render_box_glyph function in pango/pangoft2-render.c in libpango in Pango 1.28.3 and earlier, when the FreeType2 backend is enabled, allows user-assisted remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via a crafted font file, related to the glyph box for an FT_Bitmap object.

Patch / fix

  • pango1.0 Debian 14, Debian 13, Debian 12 1.28.3-1+squeeze1

debian advisories DEBIAN-CVE-2011-0020

  • pango RHEL 5 1.14.9-8.el5_6.2
  • pango RHEL 6 1.28.1-3.el6_0.3
  • evolution28-pango RHEL 4 1.14.9-13.el4_10

red hat advisories RHSA-2011:0180

  • pango openSUSE Tumbleweed 1.40.3-1.1

opensuse advisories openSUSE-SU-2024:10578-1

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-2011-0020 updated cvss 5.1

pango: Heap-based buffer overflow by rendering glyph box for certain FT_Bitmap objects

  • Red Hat Enterprise Linux (v. 5.6.z server) pango 1.14.9-8.el5_6.2 Red Hat Enterprise Linux AS version 4 evolution28-pango 1.14.9-13.el4_10 Red Hat Enterprise Linux Desktop (v. 6) pango 1.28.1-3.el6_0.3 Red Hat Enterprise Linux Desktop Optional (v. 6) pango 1.28.1-3.el6_0.3 Red Hat Enterprise Linux Desktop version 4 evolution28-pango 1.14.9-13.el4_10 Red Hat Enterprise Linux ES version 4 evolution28-pango 1.14.9-13.el4_10
    +5 more products
    Red Hat Enterprise Linux HPC Node (v. 6) pango 1.28.1-3.el6_0.3 Red Hat Enterprise Linux HPC Node Optional (v. 6) pango 1.28.1-3.el6_0.3 Red Hat Enterprise Linux Server (v. 6) pango 1.28.1-3.el6_0.3 Red Hat Enterprise Linux Workstation (v. 6) pango 1.28.1-3.el6_0.3 Red Hat Enterprise Linux WS version 4 evolution28-pango 1.14.9-13.el4_10
    fixed: vendor fix RHSA-2011:0180
  • Red Hat Enterprise Linux 4 pango
    not affected: vulnerable code not present

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

Timeline

  1. First public exploit (EDB-35232)
  2. Published

Exploit prediction

18.94% chance of exploitation in the next 30 days, higher than 97% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • EDB-35232 Pango Font Parsing - 'pangoft2-render.c' Heap Corruption remote, 2011-01-18
  • bugzilla.redhat.com https://bugzilla.redhat.com/show_bug.cgi?id=671122 referenced PoC, tagged "exploit" by a source, unverified
  • bugs.launchpad.net https://bugs.launchpad.net/ubuntu/+source/pango1.0/+bug/696616 referenced PoC, tagged "exploit" by a source, unverified
  • openwall.com http://openwall.com/lists/oss-security/2011/01/18/6 referenced PoC, tagged "exploit" by a source, unverified
  • openwall.com http://openwall.com/lists/oss-security/2011/01/20/2 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 7.6 AV:N/AC:H/Au:N/C:C/I:C/A:C

Classification

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

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.