CVE-2011-2895
The LZW decompressor in (1) the BufCompressedFill function in fontfile/decompress.c in X.Org libXfont before 1.4.4 and (2) compress/compress.c in 4.3BSD, as used in zopen.c in OpenBSD before 3.8, FreeBSD, NetBSD 4.0.x and 5.0.x before 5.0.3 and 5.1.x…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (8.36%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
The LZW decompressor in (1) the BufCompressedFill function in fontfile/decompress.c in X.Org libXfont before 1.4.4 and (2) compress/compress.c in 4.3BSD, as used in zopen.c in OpenBSD before 3.8, FreeBSD, NetBSD 4.0.x and 5.0.x before 5.0.3 and 5.1.x before 5.1.1, FreeType 2.1.9, and other products, does not properly handle code words that are absent from the decompression table when encountered, which allows context-dependent attackers to trigger an infinite loop or a heap-based buffer overflow, and possibly execute arbitrary code, via a crafted compressed stream, a related issue to CVE-2006-1168 and CVE-2011-2896.
- CVSS 2.0
- 9.3 HIGHAV:N/AC:M/Au:N/C:C/I:C/A:C
- EPSS
- 8.36% probability · 95th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-119
- Affected
- freetype/freetype · x/libxfont · freebsd/freebsd · netbsd/netbsd · openbsd/openbsd
- Source
- secalert@redhat.com
EPSS 8.4% since 26 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://cgit.freedesktop.org/xorg/lib/libXfont/commit/?id=d11ee5886e9d9ec610051a206b135a4cdc1e09a0Patch
- http://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2011-007.txt.asc
- http://lists.apple.com/archives/security-announce/2012/Feb/msg00000.html
- http://lists.apple.com/archives/security-announce/2012/May/msg00001.html
- http://lists.apple.com/archives/security-announce/2015/Dec/msg00000.html
- http://lists.apple.com/archives/security-announce/2015/Dec/msg00001.html
- http://lists.apple.com/archives/security-announce/2015/Dec/msg00002.html
- http://lists.apple.com/archives/security-announce/2015/Dec/msg00005.html
- http://lists.freedesktop.org/archives/xorg-announce/2011-August/001721.htmlPatch
- http://lists.freedesktop.org/archives/xorg-announce/2011-August/001722.htmlPatch
- http://lists.opensuse.org/opensuse-security-announce/2011-09/msg00019.html
- http://lists.opensuse.org/opensuse-security-announce/2011-12/msg00004.html
- http://secunia.com/advisories/45544Vendor Advisory
- http://secunia.com/advisories/45568Vendor Advisory
- http://secunia.com/advisories/45599Vendor Advisory
- http://secunia.com/advisories/45986
- http://secunia.com/advisories/46127
- http://secunia.com/advisories/48951
- http://securitytracker.com/id?1025920
- http://support.apple.com/kb/HT5130
- http://support.apple.com/kb/HT5281
- http://www.debian.org/security/2011/dsa-2293
- http://www.mandriva.com/security/advisories?name=MDVSA-2011:153
- http://www.openbsd.org/cgi-bin/cvsweb/src/usr.bin/compress/zopen.c#rev1.17
- http://www.openwall.com/lists/oss-security/2011/08/10/10
- http://www.redhat.com/support/errata/RHSA-2011-1154.htmlVendor Advisory
- http://www.redhat.com/support/errata/RHSA-2011-1155.htmlVendor Advisory
- http://www.redhat.com/support/errata/RHSA-2011-1161.htmlVendor Advisory
- http://www.redhat.com/support/errata/RHSA-2011-1834.html
- http://www.securityfocus.com/bid/49124
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.