CVE-2011-2895
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Insights vulnerability analysis
Description
The CVE Program 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.
Additional information
- Bugzilla 727624: BSD compress LZW decoder buffer overflow
- FAQ: Frequently asked questions about CVE-2011-2895
Common Vulnerability Scoring System (CVSS) Score Details
Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
| Red Hat | NVD | |
|---|---|---|
CVSS v2 Base Score | 6.9 | 9.3 |
Attack Vector | Local | Network |
Access Complexity | Medium | Medium |
Authentication | None | None |
Confidentiality Impact | Complete | Complete |
Integrity Impact | Complete | Complete |
Availability Impact | Complete | Complete |
CVSS v2 Vector
Red Hat: AV:L/AC:M/Au:N/C:C/I:C/A:C
NVD: AV:N/AC:M/Au:N/C:C/I:C/A:C
Frequently Asked Questions
Why is Red Hat's CVSS v3 score or Impact different from other vendors?
My product is listed as "Under investigation" or "Affected", when will Red Hat release a fix for this vulnerability?
What can I do if my product is listed as "Will not fix"?
What can I do if my product is listed as "Fix deferred"?
What is a mitigation?
I have a Red Hat product but it is not in the above list, is it affected?
Why is my security scanner reporting my product as vulnerable to this vulnerability even though my product version is fixed or not affected?
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