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TITLE:
Pango "hb_buffer_ensure()" Memory Reallocation Vulnerability

SECUNIA ADVISORY ID:
SA43578

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/43578/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=43578

RELEASE DATE:
2011-03-22

DISCUSS ADVISORY:
http://secunia.com/advisories/43578/#comments

AVAILABLE ON SITE AND IN CUSTOMER AREA:
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 * Impact
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http://secunia.com/advisories/43578/

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https://ca.secunia.com/?page=viewadvisory&vuln_id=43578

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:
A vulnerability has been reported in Pango, which can be exploited by
malicious people to cause a DoS (Denial of Service) and potentially
compromise an application using the library.

The vulnerability is caused due to the "hb_buffer_ensure()" function
in pango/opentype/hb-buffer.c not properly checking the return value
of memory reallocation operations, which can be exploited to cause
the use of an incorrect base address when trying to access the buffer
in subsequent functions.

The vulnerability is reported in version 1.28.3. Other versions may
also be affected.

SOLUTION:
Do not use applications using the library.

PROVIDED AND/OR DISCOVERED BY:
Red Hat credits the Mozilla Security Team.

ORIGINAL ADVISORY:
Mozilla Bug #606997:
https://bugzilla.mozilla.org/show_bug.cgi?id=606997

Red Hat Bug #678563:
https://bugzilla.redhat.com/show_bug.cgi?id=678563

OTHER REFERENCES:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

DEEP LINKS:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

EXTENDED DESCRIPTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

EXTENDED SOLUTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

EXPLOIT:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

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About:
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