50137 : FreeBSD arc4random() Function Entropy Source Weakness
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Views This Week	Views All Time	Added to OSVDB	Last Modified	Modified (since 2008)	Percent Complete
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Timeline

Disclosure Date
2008-11-24

Description

<em style='font-weight:bold;'>(Description Provided by <a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=2008-5162" target="_blank">CVE</a>)</em> : The arc4random function in the kernel in FreeBSD 6.3 through 7.1 does not have a proper entropy source for a short time period immediately after boot, which makes it easier for attackers to predict the function's return values and conduct certain attacks against the GEOM framework and various network protocols, related to the Yarrow random number generator.

Classification

Solution: Patch / RCS
Disclosure: Vendor Verified

Products

Unknown or Incomplete

References

Security Tracker: 1021276
CVE ID: 2008-5162 (see also: NVD)
Bugtraq ID: 32447
Secunia Advisory ID: 32871
Vendor Specific Advisory URL: http://security.freebsd.org/advisories/FreeBSD-SA-08:11.arc4random.asc
Vendor Specific Solution URL: http://security.freebsd.org/patches/SA-08:11/arc4random.patch
http://security.freebsd.org/patches/SA-08:11/arc4random6x.patch

Credit

Unknown or Incomplete

CVSSv2 Score

CVSSv2 Base Score = 6.9
Source: nvd.nist.gov | Generated: 2008-11-27 | Disagree?

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