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Loop with Unreachable Exit Condition ('Infinite Loop') The advisory has been revoked - it doesn't affect any version of package python3-unbound  (opens in a new tab)

Threat Intelligence

EPSS
0.09% (40th percentile)

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  • Snyk IDSNYK-CENTOS8-PYTHON3UNBOUND-6415105
  • published7 Mar 2024
  • disclosed7 Mar 2024
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Introduced: 7 Mar 2024

CVE-2024-1931  (opens in a new tab)
CWE-835  (opens in a new tab)

Amendment

The Centos security team deemed this advisory irrelevant for Centos:8.

NVD Description

Note: Versions mentioned in the description apply only to the upstream python3-unbound package and not the python3-unbound package as distributed by Centos.

NLnet Labs Unbound version 1.18.0 up to and including version 1.19.1 contain a vulnerability that can cause denial of service by a certain code path that can lead to an infinite loop. Unbound 1.18.0 introduced a feature that removes EDE records from responses with size higher than the client's advertised buffer size. Before removing all the EDE records however, it would try to see if trimming the extra text fields on those records would result in an acceptable size while still retaining the EDE codes. Due to an unchecked condition, the code that trims the text of the EDE records could loop indefinitely. This happens when Unbound would reply with attached EDE information on a positive reply and the client's buffer size is smaller than the needed space to include EDE records. The vulnerability can only be triggered when the 'ede: yes' option is used; non default configuration. From version 1.19.2 on, the code is fixed to avoid looping indefinitely.