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TITLE:
Apache HTTP Server Scoreboard Invalid Free Security Bypass

SECUNIA ADVISORY ID:
SA47410

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/47410/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=47410

RELEASE DATE:
2012-01-13

DISCUSS ADVISORY:
http://secunia.com/advisories/47410/#comments

AVAILABLE ON SITE AND IN CUSTOMER AREA:
 * Last Update
 * Popularity
 * Comments
 * Criticality Level
 * Impact
 * Where
 * Solution Status
 * Operating System / Software
 * CVE Reference(s)

http://secunia.com/advisories/47410/

ONLY AVAILABLE IN CUSTOMER AREA:
 * Authentication Level
 * Report Reliability
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https://ca.secunia.com/?page=viewadvisory&vuln_id=47410

ONLY AVAILABLE WITH SECUNIA CSI AND SECUNIA PSI:
 * AUTOMATED SCANNING

http://secunia.com/vulnerability_scanning/personal/
http://secunia.com/vulnerability_scanning/corporate/wsus_sccm_3rd_third_party_patching/

DESCRIPTION:
halfdog has reported a weakness in the Apache HTTP Server, which can
be exploited by malicious, local users to bypass certain security
restrictions.

The weakness is caused due to child processes being able to change
the memory type record of the "scoreboard" shared memory segment,
which can be exploited to cause an invalid free operation during the
shutdown of the parent process.

SOLUTION:
Fixed in the SVN repository.

Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

PROVIDED AND/OR DISCOVERED BY:
halfdog

ORIGINAL ADVISORY:
halfdog:
http://www.halfdog.net/Security/2011/ApacheScoreboardInvalidFreeOnShutdown/

Apache commit:
http://svn.apache.org/viewvc?view=revision&revision=1230065

OTHER REFERENCES:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

DEEP LINKS:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

EXTENDED DESCRIPTION:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

EXTENDED SOLUTION:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

EXPLOIT:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

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About:
This Advisory was delivered by Secunia as a free service to help
private users keeping their systems up to date against the latest
vulnerabilities.

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Please Note:
Secunia recommends that you verify all advisories you receive by
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Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.

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