MGASA-2023-0303 - Updated bind packages fix security vulnerabilities

Publication date: 27 Oct 2023
URL: https://advisories.mageia.org/MGASA-2023-0303.html
Type: security
Affected Mageia releases: 9
CVE: CVE-2023-3341,
     CVE-2023-4236

The code that processes control channel messages sent to `named` calls
certain functions recursively during packet parsing. Recursion depth is
only limited by the maximum accepted packet size; depending on the
environment, this may cause the packet-parsing code to run out of
available stack memory, causing `named` to terminate unexpectedly. Since
each incoming control channel message is fully parsed before its
contents are authenticated, exploiting this flaw does not require the
attacker to hold a valid RNDC key; only network access to the control
channel's configured TCP port is necessary. (CVE-2023-3341)

A flaw in the networking code handling DNS-over-TLS queries may cause
`named` to terminate unexpectedly due to an assertion failure. This
happens when internal data structures are incorrectly reused under
significant DNS-over-TLS query load. (CVE-2023-4236)

References:
- https://bugs.mageia.org/show_bug.cgi?id=32039
- https://ubuntu.com/security/notices/USN-6390-1
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-3341
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-4236

SRPMS:
- 9/core/bind-9.18.15-2.2.mga9

Mageia 2023-0303: bind security update

The code that processes control channel messages sent to `named` calls certain functions recursively during packet parsing

Summary

The code that processes control channel messages sent to `named` calls certain functions recursively during packet parsing. Recursion depth is only limited by the maximum accepted packet size; depending on the environment, this may cause the packet-parsing code to run out of available stack memory, causing `named` to terminate unexpectedly. Since each incoming control channel message is fully parsed before its contents are authenticated, exploiting this flaw does not require the attacker to hold a valid RNDC key; only network access to the control channel's configured TCP port is necessary. (CVE-2023-3341)
A flaw in the networking code handling DNS-over-TLS queries may cause `named` to terminate unexpectedly due to an assertion failure. This happens when internal data structures are incorrectly reused under significant DNS-over-TLS query load. (CVE-2023-4236)

References

- https://bugs.mageia.org/show_bug.cgi?id=32039

- https://ubuntu.com/security/notices/USN-6390-1

- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-3341

- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-4236

Resolution

MGASA-2023-0303 - Updated bind packages fix security vulnerabilities

SRPMS

- 9/core/bind-9.18.15-2.2.mga9

Severity
Publication date: 27 Oct 2023
URL: https://advisories.mageia.org/MGASA-2023-0303.html
Type: security
CVE: CVE-2023-3341, CVE-2023-4236

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