CVE-2011-2896

Swi Prolog vulnerability

CVSS

5.1

EPSS

12.7%

EPSS pct

96th

Exploited

No known

The LZW decompressor in the LWZReadByte function in giftoppm.c in the David Koblas GIF decoder in PBMPLUS, as used in the gif_read_lzw function in filter/image-gif.c in CUPS before 1.4.7, the LZWReadByte function in plug-ins/common/file-gif-load.c in GIMP 2.6.11 and earlier, the LZWReadByte function in img/gifread.c in XPCE in SWI-Prolog 5.10.4 and earlier, and other products, does not properly handle code words that are absent from the decompression table when encountered, which allows remote 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-2011-2895.

Affected vendor

Swi Prolog

Affected product

Swi Prolog

CVSS vector

AV:N/AC:H/Au:N/C:P/I:P/A:P

Weakness type (CWE)

CWE-787 — Out-of-bounds Write

Published

2011-08-19

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, high attack complexity, requiring no authentication. Successful exploitation leads to partial impact to confidentiality, partial impact to integrity, partial impact to availability.

Its EPSS score of 12.7% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it above 96% of all scored CVEs.

Check your external exposure to CVE-2011-2896

Confirm whether Swi Prolog Swi Prolog is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2011-2896.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2011-2896

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