77910 : Unbound NSEC3-Signed Zones Response Parsing Remote DoS
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Views This Week	Views All Time	Added to OSVDB	Last Modified	Modified (since 2008)	Percent Complete
5	846	over 1 year ago	12 months ago	5 times	75%

Timeline

Disclosure Date
2011-12-19

Description

<em style='font-weight:bold;'>(Description Provided by <a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=2011-4869" target="_blank">CVE</a>)</em> : validator/val_nsec3.c in Unbound before 1.4.13p2 does not properly perform proof processing for NSEC3-signed zones, which allows remote DNS servers to cause a denial of service (daemon crash) via a malformed response that lacks expected NSEC3 records, a different vulnerability than CVE-2011-4528.

Classification

Location: Remote / Network Access
Attack Type: Denial of Service
Impact: Loss of Availability
Solution: Patch / RCS, Upgrade
Exploit: Exploit Unknown
Disclosure: Vendor Verified

Solution

Upgrade to version 1.4.13p2 or higher or 1.4.14 or higher, as it has been reported to fix this vulnerability. In addition, the vendor has released a patch for some older versions.

Products

NLnet Labs	Unbound	1.4.0
		1.4.13
		1.0.1
		1.3.4

References

CVE ID: 2011-4869 (see also: NVD)
CERT VU: 209659
Secunia Advisory ID: 47220 47326
ISS X-Force ID: 71868
Related OSVDB ID: 77909
Vendor Specific Advisory URL: http://unbound.nlnetlabs.nl/downloads/CVE-2011-4528.txt
Vendor Specific News/Changelog Entry: http://www.debian.org/security/2011/dsa-2370

Credit

Not Available

CVSSv2 Score

CVSSv2 Base Score = 7.8
Source: nvd.nist.gov | Generated: 2011-12-20 | Disagree? | There are 2 more: View All

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