Bug 2344615 (CVE-2024-12243)

Summary: CVE-2024-12243 gnutls: GnuTLS Impacted by Inefficient DER Decoding in libtasn1 Leading to Remote DoS
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: adudiak, kshier, omaciel, stcannon, yguenane
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
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Doc Text:
A flaw was found in GnuTLS, which relies on libtasn1 for ASN.1 data processing. Due to an inefficient algorithm in libtasn1, decoding certain DER-encoded certificate data can take excessive time, leading to increased resource consumption. This flaw allows a remote attacker to send a specially crafted certificate, causing GnuTLS to become unresponsive or slow, resulting in a denial-of-service condition.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2344616, 2344617    
Bug Blocks:    

Description OSIDB Bzimport 2025-02-10 08:40:10 UTC 
The issue is twofold: decoding a DER input with sequences and locating
a specific element in a sequence. Even though a DER sequence is
conceptually an array, in libtasn1 it is represented as a linked list,
whose elements are assigned a string name, such as "?1". Therefore a
simple lookup of an element at a given position is linear O(N) time
complexity. When decoding a DER sequence, in each step libtasn1 looks
up the parent node, recorded on the first element, which requires a
backward linear search, resulting in O(N^2) time complexity.
Comment 4 errata-xmlrpc 2025-04-22 01:41:22 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2025:4051 https://access.redhat.com/errata/RHSA-2025:4051
Comment 5 errata-xmlrpc 2025-05-13 09:56:30 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2025:7076 https://access.redhat.com/errata/RHSA-2025:7076
Comment 6 errata-xmlrpc 2025-05-20 00:52:03 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.4 Extended Update Support

Via RHSA-2025:8020 https://access.redhat.com/errata/RHSA-2025:8020