Vulnerability CVE-2012-4409
Published: 2012-11-21   Modified: 2012-11-22

Description:
Stack-based buffer overflow in the check_file_head function in extra.c in mcrypt 2.6.8 and earlier allows user-assisted remote attackers to execute arbitrary code via an encrypted file with a crafted header containing long salt data that is not properly handled during decryption.

See advisories in our WLB2 database:
Topic
Author
Date
High
mcrypt <= 2.5.8 STACK based overflow
Tosh
26.11.2012

Type:

CWE-119

 (Improper Restriction of Operations within the Bounds of a Memory Buffer)

CVSS2 => (AV:N/AC:M/Au:N/C:P/I:P/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
6.8/10
6.4/10
8.6/10
Exploit range
Attack complexity
Authentication
Remote
Medium
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
Partial
Partial
Affected software
Mcrypt -> Mcrypt 

 References:
https://bugzilla.redhat.com/show_bug.cgi?id=855029
http://www.securitytracker.com/id?1027532
http://www.openwall.com/lists/oss-security/2012/09/06/4
http://secunia.com/advisories/51010
http://secunia.com/advisories/50507
http://packetstormsecurity.org/files/116268/mcrypt-2.6.8-Buffer-Overflow-Proof-Of-Concept.html
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