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Apache apr-util Library and Environment Variable Expansion Vulnerabilities
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Secunia Advisory:
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SA12540
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Release Date:
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2004-09-15
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Last Update:
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2004-09-18
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Critical:
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Moderately critical
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Impact:
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Privilege escalation
DoS
System access
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Where:
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From remote
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Solution Status:
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Vendor Patch
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| Software: | Apache 2.0.x
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| | CVE reference: | CVE-2004-0747 (Secunia mirror)
CVE-2004-0786 (Secunia mirror)
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Description:
Two vulnerabilities have been reported in Apache, which can be exploited by malicious people to cause a DoS (Denial of Service) or potentially compromise a system, or by malicious, local users to gain escalated privileges.
1) An input validation error within the apr-util library's IPv6 URI parsing functionality can be exploited via a specially crafted request.
Successful exploitation crashes a httpd child process. However, it is reportedly believed that the vulnerability may allow code execution on BSD systems.
The vulnerability affects versions 2.0.35 through 2.0.50.
2) A boundary error within the expansion of environment variables when parsing configuration files can be exploited to cause a buffer overflow via a specially crafted ".htaccess" file.
Successful exploitation may allow a malicious, local user to gain escalated privileges.
The vulnerability affects versions 2.0.35 through 2.0.50.
Do you have this product installed on your home computer? Scan using the free Personal Software Inspector. Check if a vulnerable version is installed on computers in your corporate network, scan using the Network Software Inspector.
Solution:
Apply patches or update to version 2.0.51.
http://httpd.apache.org/download.cgi
Patches:
http://www.apache.org/dist/httpd/patches/apply_to_2.0.50/
Provided and/or discovered by:
1) Reported by vendor.
2) Swedish IT Incident Centre
Changelog:
2004-09-18: Added link to US-CERT vulnerability note.
Original Advisory:
NISCC:
http://www.uniras.gov.uk/vuls/2004/403518/index.htm
Other References:
SA12434:
http://secunia.com/advisories/12434/
SA12527:
http://secunia.com/advisories/12527/
US-CERT VU#481998:
http://www.kb.cert.org/vuls/id/481998
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
Secunia collects, validates, and verifies all vulnerability reports issued by security research groups, vendors, and others.
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