58836 : Unbound NSEC3 Record Signature Check Validation Bypass
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Views This Week	Views All Time	Added to OSVDB	Last Modified	Modified (since 2008)	Percent Complete
8	525	over 2 years ago	over 2 years ago	4 times	90%

Timeline

Disclosure Date	Vendor Solution Date
2009-10-07	2009-10-07

Description

Unbound contains a flaw that may allow a malicious user to bypass NSEC3 record signature checks. The issue is triggered when a malicious user sends a specially crafted delegation response in spoofed DNS packets. It is possible that the flaw may allow a secure delegation to be downgraded to insecure resulting in a loss of integrity.

Classification

Location: Remote / Network Access
Attack Type: Authentication Management
Impact: Loss of Integrity
Solution: Upgrade
Exploit: Exploit Unknown
Disclosure: Vendor Verified

Solution

Upgrade to version 1.3.4 or higher, as it has been reported to fix this vulnerability. An upgrade is required as there are no known workarounds.

Products

NLnet Labs	Unbound	1.3.3
		1.3.2
		1.3.1
		1.3.0
		1.2.1
		1.2.0
		1.1.1
		1.1.0
		1.0.2
		1.0.1
		1.0.0
		0.11
		0.10
		0.9
		0.8
		0.7.2
		0.7.1
		0.7
		0.6
		0.5
		0.4
		0.3
		0.2
		0.1
		0.0

References

CVE ID: 2009-3602 (see also: NVD)
Secunia Advisory ID: 36996 37913 38669
ISS X-Force ID: 53729
Vendor Specific News/Changelog Entry: http://lists.debian.org/debian-security-announce/2009/msg00285.html
http://lists.opensuse.org/opensuse-security-announce/2010-02/msg00008.html
Vendor URL: http://unbound.net/index.html
Other Advisory URL: http://unbound.net/pipermail/unbound-users/2009-October/000852.html
http://www.openwall.com/lists/oss-security/2009/10/09/2
http://www.openwall.com/lists/oss-security/2009/10/09/3
http://www.vupen.com/english/advisories/2009/2875

Credit

Vendor Provided -

CVSSv2 Score

CVSSv2 Base Score = 7.5
Source: nvd.nist.gov | Generated: 2009-10-13 | Disagree?

Blogs

This product uses the Daylife API but is not endorsed or certified by Daylife.

This section lists the latest news and blogs found via the daylife API (and for older items, the technorati API), which mention or otherwise discuss this vulnerability.

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