Home / mailings [SECURITY] [DSA 5620-1] unbound security update
Posted on 14 February 2024
Debian Security Advisory- -------------------------------------------------------------------------
Debian Security Advisory DSA-5620-1 security@debian.org
https://www.debian.org/security/ Salvatore Bonaccorso
February 14, 2024 https://www.debian.org/security/faq
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Package : unbound
CVE ID : CVE-2023-50387 CVE-2023-50868
Debian Bug : 1063845
Two vulnerabilities were discovered in unbound, a validating, recursive,
caching DNS resolver. Specially crafted DNSSEC answers could lead
unbound down a very CPU intensive and time costly DNSSEC
(CVE-2023-50387) or NSEC3 hash (CVE-2023-50868) validation path,
resulting in denial of service.
Details can be found at
https://nlnetlabs.nl/downloads/unbound/CVE-2023-50387_CVE-2023-50868.txt
For the oldstable distribution (bullseye), these problems have been fixed
in version 1.13.1-1+deb11u2.
For the stable distribution (bookworm), these problems have been fixed in
version 1.17.1-2+deb12u2.
We recommend that you upgrade your unbound packages.
For the detailed security status of unbound please refer to its security
tracker page at:
https://security-tracker.debian.org/tracker/unbound
Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/
Mailing list: debian-security-announce@lists.debian.org
