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TITLE:
GnuTLS TLS Record Handling and ASN1 Length DER Decoding
Vulnerabilities

SECUNIA ADVISORY ID:
SA48488

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/48488/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=48488

RELEASE DATE:
2012-03-21

DISCUSS ADVISORY:
http://secunia.com/advisories/48488/#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/48488/

ONLY AVAILABLE IN CUSTOMER AREA:
 * Authentication Level
 * Report Reliability
 * Secunia PoC
 * Secunia Analysis
 * Systems Affected
 * Approve Distribution
 * Remediation Status
 * Secunia CVSS Score
 * CVSS

https://ca.secunia.com/?page=viewadvisory&vuln_id=48488

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:
Mu Dynamics has reported two vulnerabilities in GnuTLS, which can be
exploited by malicious people to potentially compromise an
application using the library.

1) An error within the block cipher decryption logic when handling
TLS records can be exploited to corrupt memory via a specially
crafted "GenericBlockCipher" structure.

This vulnerability is reported in versions prior to 2.12.17 and prior
to 3.0.15.

2) Some errors in the libtasn1 library can be exploited to corrupt
memory.

For more information:
SA48397

This vulnerability is reported in versions prior 2.12.18 and prior to
3.0.16.

Successful exploitation of the vulnerabilities may allow execution of
arbitrary code.

SOLUTION:
Update to version 2.12.18 or 3.0.16.

PROVIDED AND/OR DISCOVERED BY:
Matthew Hall, Mu Dynamics

ORIGINAL ADVISORY:
GnuTLS:
http://article.gmane.org/gmane.comp.encryption.gpg.gnutls.devel/5952/

Mu Dynamics (MU-201202-01, MU-201202-02):
http://blog.mudynamics.com/2012/03/20/gnutls-and-libtasn1-vulns/

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:
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