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FreeBSD Security Advisory (FreeBSD-SA-08:11.arc4random.asc)

Information

Severity

Severity

Medium

Family

Family

FreeBSD Local Security Checks

CVSSv2 Base

CVSSv2 Base

6.9

CVSSv2 Vector

CVSSv2 Vector

AV:L/AC:M/Au:N/C:C/I:C/A:C

Solution Type

Solution Type

Vendor Patch

Created

Created

14 years ago

Modified

Modified

5 years ago

Summary

The remote host is missing an update to the system as announced in the referenced advisory FreeBSD-SA-08:11.arc4random.asc

Insight

Insight

arc4random(9) is a generic-purpose random number generator based on the key stream generator of the RC4 cipher. It is expected to be cryptographically strong, and used throughout the FreeBSD kernel for a variety of purposes, some of which rely on its cryptographic strength. arc4random(9) is periodically reseeded with entropy from the FreeBSD kernel's Yarrow random number generator, which gathers entropy from a variety of sources including hardware interrupts. During the boot process, additional entropy is provided to the Yarrow random number generator from userland, helping to ensure that adequate entropy is present for cryptographic purposes. When the arc4random(9) random number generator is initialized, there may be inadequate entropy to meet the needs of kernel systems which rely on arc4random(9) and it may take up to 5 minutes before arc4random(9) is reseeded with secure entropy from the Yarrow random number generator.

Solution

Solution

Upgrade your system to the appropriate stable release or security branch dated after the correction date https://secure1.securityspace.com/smysecure/catid.html?in=FreeBSD-SA-08:11.arc4random.asc

Common Vulnerabilities and Exposures (CVE)