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Debian: Security update for unbound

It was discovered that Unbound, a recursive DNS resolver, would crash when processing certain malformed DNS responses from authoritative DNS servers, leading to denial of service. Unbound attempts to free unallocated memory during processing of duplicate CNAME records in a signed zone. Unbound does not properly process malformed responses which lack expected NSEC3 records. Updated packages are available from security.debian.org.

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- -------------------------------------------------------------------------
Debian Security Advisory DSA-2370-1                   security@debian.org
http://www.debian.org/security/                            Florian Weimer
December 22, 2011                      http://www.debian.org/security/faq
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Package        : unbound
Vulnerability  : several
Problem type   : remote
Debian-specific: no
CVE ID         : CVE-2011-4528 CVE-2011-4869

It was discovered that Unbound, a recursive DNS resolver, would crash
when processing certain malformed DNS responses from authoritative DNS
servers, leading to denial of service.

CVE-2011-4528
  Unbound attempts to free unallocated memory during processing
  of duplicate CNAME records in a signed zone.

CVE-2011-4869
  Unbound does not properly process malformed responses which
  lack expected NSEC3 records.

For the oldstable distribution (lenny), these problems have been fixed in
version 1.4.6-1~lenny2.

For the stable distribution (squeeze), these problems have been fixed in
version 1.4.6-1+squeeze2.

For the testing distribution (wheezy) and the unstable distribution
(sid), these problems have been fixed in version 1.4.14-1.

We recommend that you upgrade your unbound packages.

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: http://www.debian.org/security/

Mailing list: debian-security-announce@lists.debian.org
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