Mandrake Linux Security Advisory : gzip (MDKSA-2006:167)

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Synopsis :

The remote Mandrake Linux host is missing a security update.

Description :

NULL Dereference (CVE-2006-4334)

A stack modification vulnerability (where a stack buffer can be
modified out of bounds, but not in the traditional stack overrun
sense) exists in the LZH decompression support of gzip.

A .bss buffer underflow exists in gzip's pack support, where a loop
from build_tree() does not enforce any lower bound while constructing
the prefix table. (CVE-2006-4336)

A .bss buffer overflow vulnerability exists in gzip's LZH support, due
to it's inability to handle exceptional input in the make_table()
function, a pathological decoding table can be constructed in such a
way as to generate counts so high that the rapid growth of `nextcode`
exceeds the size of the table[] buffer. (CVE-2006-4337)

A possible infinite loop exists in code from unlzh.c for traversing
the branches of a tree structure. This makes it possible to disrupt
the operation of automated systems relying on gzip for data
decompression, resulting in a minor DoS. (CVE-2006-4338) Updated
packages have been patched to address these issues.

Solution :

Update the affected gzip package.

Risk factor :

High / CVSS Base Score : 7.5

Family: Mandriva Local Security Checks

Nessus Plugin ID: 24553 (mandrake_MDKSA-2006-167.nasl)

Bugtraq ID:

CVE ID: CVE-2006-4334

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