Several vulnerabilities were discovered in BIND, a DNS server implementation. CVE-2022-2795 Yehuda Afek, Anat Bremler-Barr and Shani Stajnrod discovered that a flaw in the resolver code can cause named to spend excessive amounts of time on processing large delegations, significantly degrade resolver performance and result in denial of service. CVE-2022-3080 Maksym Odinintsev discovered that the resolver can crash when stale cache and stale answers are enabled with a zero stale-answer-timeout. A remote attacker can take advantage of this flaw to cause a denial of service (daemon crash) via specially crafted queries to the resolver. CVE-2022-38177 It was discovered that the DNSSEC verification code for the ECDSA algorithm is susceptible to a memory leak flaw. A remote attacker can take advantage of this flaw to cause BIND to consume resources, resulting in a denial of service. CVE-2022-38178 It was discovered that the DNSSEC verification code for the EdDSA algorithm is susceptible to a memory leak flaw. A remote attacker can take advantage of this flaw to cause BIND to consume resources, resulting in a denial of service. For the stable distribution (bullseye), these problems have been fixed in version 1:9.16.33-1~deb11u1. We recommend that you upgrade your bind9 packages. For the detailed security status of bind9 please refer to its security tracker page at: https://security-tracker.debian.org/tracker/bind9
Several vulnerabilities were discovered in BIND, a DNS server implementation.
Yehuda Afek, Anat Bremler-Barr and Shani Stajnrod discovered that a flaw in the resolver code can cause named to spend excessive amounts of time on processing large delegations, significantly degrade resolver performance and result in denial of service.
Maksym Odinintsev discovered that the resolver can crash when stale cache and stale answers are enabled with a zero stale-answer-timeout. A remote attacker can take advantage of this flaw to cause a denial of service (daemon crash) via specially crafted queries to the resolver.
It was discovered that the DNSSEC verification code for the ECDSA algorithm is susceptible to a memory leak flaw. A remote attacker can take advantage of this flaw to cause BIND to consume resources, resulting in a denial of service.
It was discovered that the DNSSEC verification code for the EdDSA algorithm is susceptible to a memory leak flaw. A remote attacker can take advantage of this flaw to cause BIND to consume resources, resulting in a denial of service.
For the stable distribution (bullseye), these problems have been fixed in version 1:9.16.33-1~deb11u1.
We recommend that you upgrade your bind9 packages.
For the detailed security status of bind9 please refer to its security tracker page at: https://security-tracker.debian.org/tracker/bind9
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