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Alerts This Week
Warning Icon 1 544
Alerts This Week
Warning Icon 1 544

Debian: DSA-2370-1 Critical Alert: Unbound Denial Of Service Issue

debian
Calendar Grey December 22, 2011
Scroller Debian
Service interruption caused by incorrect DNS replies in Unbound. Debian users are advised to apply the update.
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
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Topics Covered

security advisory denial of service critical debian dns issue unbound

Summary

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/



Severity
critical
Lowest
Low
Medium
High
Critical

Package: unbound
CVE ID: CVE-2011-4528 CVE-2011-4869

Topics%20covered

Topics Covered

security advisory denial of service critical debian dns issue unbound

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