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Home >> Browse Vulnerability Assessment Database >> Gentoo Local Security Checks >> [GLSA-200609-13] gzip: Multiple vulnerabilities

Vulnerability Assessment Details

[GLSA-200609-13] gzip: Multiple vulnerabilities

Vulnerability Assessment Summary
gzip: Multiple vulnerabilities

Detailed Explanation for this Vulnerability Assessment
The remote host is affected by the vulnerability described in GLSA-200609-13
(gzip: Multiple vulnerabilities)

Tavis Ormandy of the Google Security Team has reported multiple
vulnerabilities in gzip. A stack buffer modification vulnerability was
discovered in the LZH decompression code, where a pathological data
stream may result in the modification of stack data such as frame
pointer, return address or saved registers. A static buffer underflow
was discovered in the pack decompression support, permiting a specially
crafted pack archive to underflow a .bss buffer. A static buffer
overflow was uncovered in the LZH decompression code, permiting a data
stream consisting of pathological huffman codes to overflow a .bss
buffer. Multiple infinite loops were also uncovered in the LZH
decompression code.


A remote attacker may create a specially crafted gzip archive, which
when decompressed by a user or automated system exectues arbitrary code
with the rights of the user id invoking gzip. The infinite loops
may be abused by a possible hacker to disrupt any automated systems invoking
gzip to handle data decompression.


There is no known workaround at this time.


All gzip users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=app-arch/gzip-1.3.5-r9"

Network Security Threat Level: Medium

Networks Security ID:

Vulnerability Assessment Copyright: (C) 2006 Michel Arboi

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