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TITLE:
D-Bus Message Validation Nested Variants Denial of Service

SECUNIA ADVISORY ID:
SA42580

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/42580/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=42580

RELEASE DATE:
2010-12-14

DISCUSS ADVISORY:
http://secunia.com/advisories/42580/#comments

AVAILABLE ON SITE AND IN CUSTOMER AREA:
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 * Criticality Level
 * Impact
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 * CVE Reference(s)

http://secunia.com/advisories/42580/

ONLY AVAILABLE IN CUSTOMER AREA:
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https://ca.secunia.com/?page=viewadvisory&vuln_id=42580

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:
Rémi Denis-Courmont has reported a vulnerability in D-Bus, which can
be exploited by malicious, local users to cause a DoS (Denial of
Service).

The vulnerability is caused due to an error when processing messages
containing nested variants, which can be exploited to cause a stack
overflow and e.g. crash the D-Bus daemon by sending a D-Bus message
containing a large number of nested variants.

The vulnerability is reported in version 1.4.0. Other versions may
also be affected.

SOLUTION:
Restrict access to trusted users only.

PROVIDED AND/OR DISCOVERED BY:
Rémi Denis-Courmont

ORIGINAL ADVISORY:
Rémi Denis-Courmont:
http://www.remlab.net/op/dbus-variant-recursion.shtml
http://lists.freedesktop.org/archives/dbus/2010-December/013822.html

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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