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Home >> Browse Vulnerability Assessment Database >> Gentoo Local Security Checks >> [GLSA-200512-09] cURL: Off-by-one errors in URL handling


Vulnerability Assessment Details

[GLSA-200512-09] cURL: Off-by-one errors in URL handling

Vulnerability Assessment Summary
cURL: Off-by-one errors in URL handling

Detailed Explanation for this Vulnerability Assessment
The remote host is affected by the vulnerability described in GLSA-200512-09
(cURL: Off-by-one errors in URL handling)


Stefan Esser from the Hardened-PHP Project has reported a
vulnerability in cURL that permits for a local buffer overflow when cURL
attempts to parse specially crafted URLs. The URL can be specially
crafted in one of two ways: the URL could be malformed in a way that
prevents a terminating null byte from being added to either a hostname
or path buffer
or the URL could contain a "?" separator in the
hostname portion, which causes a "/" to be prepended to the resulting
string.

Impact

A possible hacker capable of getting cURL to parse a maliciously crafted
URL could cause a denial of service or execute arbitrary code with the
rights of the user making the call to cURL. A possible hacker could also
escape open_basedir or safe_mode pseudo-restrictions when exploiting
this problem from within a PHP program when PHP is compiled with
libcurl.

Workaround

There is no known workaround at this time.

References:
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-4077
http://www.hardened-php.net/advisory_242005.109.html


Solution:
All cURL users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=net-misc/curl-7.15.1"


Network Security Threat Level: Low


Networks Security ID:

Vulnerability Assessment Copyright: (C) 2005 Michel Arboi

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