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High ELSA-2024-1781 6 CVEs

Important: bind9.16 security update (Oracle Linux 8)

Published Apr 11, 2024 · Updated Apr 11, 2024

Ecosystem: Oracle Linux

Summary

[32:9.16.23-0.16.2]
- Prevent crashing at masterformat system test (CVE-2023-6516)

[32:9.16.23-0.16.1]
- Prevent increased CPU load on large DNS messages (CVE-2023-4408)
- Prevent assertion failure when nxdomain-redirect is used with
RFC 1918 reverse zones (CVE-2023-5517)
- Prevent assertion failure if DNS64 and serve-stale is used (CVE-2023-5679)
- Specific recursive query patterns may lead to an out-of-memory
condition (CVE-2023-6516)
- Prevent increased CPU consumption in DNSSEC validator (CVE-2023-50387
CVE-2023-50868)
- Import tests for large DNS messages fix
- Add downstream change complementing CVE-2023-50387

[32:9.16.23-0.16]
- Limit the amount of recursion possible in control channel (CVE-2023-3341)

[32:9.16.23-0.15]
- Strengten cache cleaning to prevent overflowing configured limit
(CVE-2023-2828)

Fixed packages 9

ReleasePackageFixed in
Oracle Linux · 8 bind9.16 32:9.16.23-0.16.el8_9.2
Oracle Linux · 8 bind9.16-chroot 32:9.16.23-0.16.el8_9.2
Oracle Linux · 8 bind9.16-devel 32:9.16.23-0.16.el8_9.2
Oracle Linux · 8 bind9.16-dnssec-utils 32:9.16.23-0.16.el8_9.2
Oracle Linux · 8 bind9.16-doc 32:9.16.23-0.16.el8_9.2
Oracle Linux · 8 bind9.16-libs 32:9.16.23-0.16.el8_9.2
Oracle Linux · 8 bind9.16-license 32:9.16.23-0.16.el8_9.2
Oracle Linux · 8 bind9.16-utils 32:9.16.23-0.16.el8_9.2
Oracle Linux · 8 python3-bind9.16 32:9.16.23-0.16.el8_9.2

Vulnerabilities 6

  • High 7.5
    CVE-2023-4408

    Parsing large DNS messages may cause excessive CPU load

    The DNS message parsing code in `named` includes a section whose computational complexity is overly high. It does not cause problems for typical DNS traffic, but crafted queries and responses may cause excessive CPU load on the affected `named` instance by ex…

    ISC BIND 9 bind9 bind9 Debian Ubuntu Azure Linux Alpine Wolfi
  • High 7.5
    CVE-2023-50387 Public exploit EPSS 100%

    Certain DNSSEC aspects of the DNS protocol (in RFC 4033, 4034, 4035, 6840, and related RFCs) allow remote attackers to …

    bind9 bind9 bind unbound Debian Ubuntu Azure Linux Alpine Wolfi
  • High 7.5
    CVE-2023-50868 Public exploit EPSS 74%

    The Closest Encloser Proof aspect of the DNS protocol (in RFC 5155 when RFC 9276 guidance is skipped) allows remote att…

    bind9 bind9 bind unbound Debian Ubuntu Azure Linux Alpine Wolfi
  • High 7.5
    CVE-2023-5517

    Querying RFC 1918 reverse zones may cause an assertion failure when "nxdomain-redirect" is enabled

    A flaw in query-handling code can cause `named` to exit prematurely with an assertion failure when: - `nxdomain-redirect <domain>;` is configured, and - the resolver receives a PTR query for an RFC 1918 address that would normally result in an authoritative N…

    ISC BIND 9 bind9 bind9 Debian Ubuntu Azure Linux Alpine Wolfi
  • High 7.5
    CVE-2023-5679

    Enabling both DNS64 and serve-stale may cause an assertion failure during recursive resolution

    A bad interaction between DNS64 and serve-stale may cause `named` to crash with an assertion failure during recursive resolution, when both of these features are enabled. This issue affects BIND 9 versions 9.16.12 through 9.16.45, 9.18.0 through 9.18.21, 9.19…

    ISC BIND 9 bind9 bind9 Debian Ubuntu Azure Linux Alpine Wolfi
  • High 7.5
    CVE-2023-6516

    Specific recursive query patterns may lead to an out-of-memory condition

    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 clea…

    ISC BIND 9 bind9 bind9 Debian Ubuntu Azure Linux Alpine Wolfi