What’s Vulnerable › Vulnerabilities

CVE-2011-3193

• Severity: critical (CVSS 9.3 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 7.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2012-06-16 · updated 2026-06-16
• Weakness: CWE-787

Description

Heap-based buffer overflow in the Lookup_MarkMarkPos function in the HarfBuzz module (harfbuzz-gpos.c), as used by Qt before 4.7.4 and Pango, allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a crafted font file.

Affected products

• Canonical Ubuntu Linux: 10.04, 11.04
• Gnome Pango: before 1.25.1 — fixed in 1.25.1
• Opensuse: 11.3, 11.4
• Qt: before 4.7.4 — fixed in 4.7.4
• RedHat Enterprise Linux Desktop: 4.0, 5.0, 6.0
• RedHat Enterprise Linux Eus: 6.1
• RedHat Enterprise Linux Server: 4.0, 5.0, 6.0
• RedHat Enterprise Linux Workstation: 4.0, 5.0, 6.0

How to fix

Upgrade to a fixed version: Gnome Pango 1.25.1; Qt 4.7.4. Check the vendor advisory for mitigations.

References

• http://cgit.freedesktop.org/harfbuzz.old/commit/?id=81c8ef785b079980ad5b46be4fe7c7bf156dbf65
• http://cgit.freedesktop.org/harfbuzz/commit/src/harfbuzz-gpos.c?id=da2c52abcd75d46929b34cad55c4fb2c8892bc08
• http://git.gnome.org/browse/pango/commit/pango/opentype/harfbuzz-gpos.c?id=a7a715480db66148b1f487528887508a7991dcd0
• http://lists.opensuse.org/opensuse-updates/2011-10/msg00007.html
• http://lists.opensuse.org/opensuse-updates/2011-10/msg00008.html
• http://rhn.redhat.com/errata/RHSA-2011-1323.html
• http://rhn.redhat.com/errata/RHSA-2011-1324.html
• http://rhn.redhat.com/errata/RHSA-2011-1325.html
• http://rhn.redhat.com/errata/RHSA-2011-1326.html
• http://rhn.redhat.com/errata/RHSA-2011-1327.html
• http://rhn.redhat.com/errata/RHSA-2011-1328.html
• http://secunia.com/advisories/41537

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