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CVE-2023-6516

Status Candidate

Overview

To keep its cache database efficient, `named` running as a recursive resolver occasionally attempts to clean up the database. It uses several methods, including some that are asynchronous: a small chunk of memory pointing to the cache element that can be cleaned up is first allocated and then queued for later processing. It was discovered that if the resolver is continuously processing query patterns triggering this type of cache-database maintenance, `named` may not be able to handle the cleanup events in a timely manner. This in turn enables the list of queued cleanup events to grow infinitely large over time, allowing the configured `max-cache-size` limit to be significantly exceeded. This issue affects BIND 9 versions 9.16.0 through 9.16.45 and 9.16.8-S1 through 9.16.45-S1.

Related Files

Ubuntu Security Notice USN-6642-1
Posted Feb 20, 2024
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6642-1 - Shoham Danino, Anat Bremler-Barr, Yehuda Afek, and Yuval Shavitt discovered that Bind incorrectly handled parsing large DNS messages. A remote attacker could possibly use this issue to cause Bind to consume resources, leading to a denial of service. Elias Heftrig, Haya Schulmann, Niklas Vogel, and Michael Waidner discovered that Bind incorrectly handled validating DNSSEC messages. A remote attacker could possibly use this issue to cause Bind to consume resources, leading to a denial of service.

tags | advisory, remote, denial of service
systems | linux, ubuntu
advisories | CVE-2023-4408, CVE-2023-50387, CVE-2023-50868, CVE-2023-5517, CVE-2023-6516
SHA-256 | 59690fe75ddf72adb23e500a05f4e810c75b29c755af18781f7010d4def3deac
Download | Favorite | View
Debian Security Advisory 5621-1
Posted Feb 14, 2024
Authored by Debian | Site debian.org

Debian Linux Security Advisory 5621-1 - Several vulnerabilities were discovered in BIND, a DNS server implementation, which may result in denial of service.

tags | advisory, denial of service, vulnerability
systems | linux, debian
advisories | CVE-2023-4408, CVE-2023-50387, CVE-2023-50868, CVE-2023-5517, CVE-2023-5679, CVE-2023-6516
SHA-256 | c8c07e1985655854dd15f5e76e52c42de91372742f9064ab63788fb3a08e6280
Download | Favorite | View
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