FreeBSD file module BEGIN Regular Expression Denial of Service Vulnerability

FreeBSD file module BEGIN Regular Expression Denial of Service Vulnerability

Release date:
Updated on:

Affected Systems:
FreeBSD
Description:
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CVE (CAN) ID: CVE-2013-7345
 
FreeBSD is a UNIX operating system and an important branch of Unix developed from BSD, javasbsd, and 4.4BSD. The file (1) utility can test the classification of file System Objects Based on the file system, magic number, and language. In the awk script detector of magic/Magdir/commands versions earlier than file 5.15, regular expressions of BEGIN repeatedly use multiple wildcards, which allows independent context attackers to use specially crafted ASCII files, A large amount of backtracking is triggered, resulting in denial of service.

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<* Source: vendor

Link: ftp://ftp.freebsd.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-14:16.file.asc
*>

Suggestion:
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Vendor patch:
 
FreeBSD
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FreeBSD has released a Security Bulletin (FreeBSD-SA-14: 16. file) and patches for this:
FreeBSD-SA-14: 16. file: Multiple vulnerabilities in file (1) and libmagic (3)
Link: ftp://ftp.freebsd.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-14:16.file.asc

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