CVE-2011-2895
The MITRE CVE dictionary describes this issue as:
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.
Find out more about CVE-2011-2895 from the MITRE CVE dictionary dictionary and NIST NVD.
CVSS v2 metrics
| Base Score | 6.9 |
|---|---|
| Base Metrics | AV:L/AC:M/Au:N/C:C/I:C/A:C |
| Access Vector | Local |
| Access Complexity | Medium |
| Authentication | None |
| Confidentiality Impact | Complete |
| Integrity Impact | Complete |
| Availability Impact | Complete |
Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).
Red Hat Security Errata
| Platform | Errata | Release Date |
|---|---|---|
| Red Hat Enterprise Linux 4 (xorg-x11) | RHSA-2011:1155 | 2011-08-11 |
| Red Hat Enterprise Linux 4 (freetype) | RHSA-2011:1161 | 2011-08-15 |
| Red Hat Enterprise Linux 6 (libXfont) | RHSA-2011:1154 | 2011-08-11 |
| Red Hat Enterprise Linux EUS (v. 5.6 server) (libXfont) | RHSA-2011:1834 | 2011-12-19 |
| Red Hat Enterprise Linux 5 (libXfont) | RHSA-2011:1154 | 2011-08-11 |
Affected Packages State
| Platform | Package | State |
|---|---|---|
| Red Hat Enterprise Linux 6 | busybox | Not affected |
| Red Hat Enterprise Linux 6 | ncompress | Not affected |
| Red Hat Enterprise Linux 6 | gzip | Not affected |
| Red Hat Enterprise Linux 6 | freetype | Not affected |
| Red Hat Enterprise Linux 6 | mailx | Will not fix |
| Red Hat Enterprise Linux 6 | libarchive | Not affected |
| Red Hat Enterprise Linux 5 | ncompress | Not affected |
| Red Hat Enterprise Linux 5 | freetype | Not affected |
| Red Hat Enterprise Linux 5 | gzip | Not affected |
| Red Hat Enterprise Linux 5 | busybox | Not affected |
| Red Hat Enterprise Linux 5 | mailx | Not affected |
| Red Hat Enterprise Linux 4 | ncompress | Not affected |
| Red Hat Enterprise Linux 4 | busybox | Not affected |
| Red Hat Enterprise Linux 4 | mailx | Not affected |
| Red Hat Enterprise Linux 4 | gzip | Not affected |
CVE description copyright © 2017, The MITRE Corporation