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TITLE:
libxslt "crypto:rc4_encrypt" and "crypto:rc4_decrypt" Buffer Overflow
Vulnerabilities

SECUNIA ADVISORY ID:
SA31230

VERIFY ADVISORY:
http://secunia.com/advisories/31230/

CRITICAL:
Moderately critical

IMPACT:
DoS, System access

WHERE:
>From remote

REVISION:
1.1 originally posted 2008-08-01

SOFTWARE:
libxslt 1.x
http://secunia.com/product/18744/

DESCRIPTION:
Chris Evans has reported some vulnerabilities in libxslt, which can
be exploited by malicious people to cause a DoS (Denial of Service)
and potentially compromise an application using the library.

The vulnerabilities are caused due to boundary errors within crypto.c
when handling the XSLT "crypto:rc4_encrypt" and "crypto:rc4_decrypt"
functions. This can be exploited to cause a heap-based buffer
overflow via a specially crafted stylesheet.

The vulnerability is reported in version 1.1.24. Other versions may
also be affected.

SOLUTION:
Fixed in the SVN repository.

PROVIDED AND/OR DISCOVERED BY:
Chris Evans, Google Security Team

CHANGELOG:
2008-08-01: Added link to oCERT.

ORIGINAL ADVISORY:
http://scary.beasts.org/security/CESA-2008-003.html

OTHER REFERENCES:
oCERT:
http://www.ocert.org/advisories/ocert-2008-009.html

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