Debian 10 Buster DLA-3138-1 High: BIND Resource Leak Issues

debian lts

October 5, 2022

Several vulnerabilities were discovered in BIND, a DNS server implementation

Topics Covered

security advisory denial of service high severity debian BIND resource leak

Summary

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-2022-38177

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 Debian 10 buster, these problems have been fixed in version
1:9.11.5.P4+dfsg-5.1+deb10u8.

We recommend that you upgrade your bind9 packages.

For the detailed security status of bind9 please refer to