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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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Popularity:
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20,052 views
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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
CVE-2004-0786
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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.
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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About this Secunia Advisory
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
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