Bug 1226365

Summary: VUL-0: CVE-2024-35325: petsc: libyaml: double-free in yaml_event_delete in /src/libyaml/src/api.c
Product: [openSUSE] openSUSE Distribution Reporter: Camila Camargo de Matos <camila.matos>
Component: SecurityAssignee: Egbert Eich <eich>
Status: RESOLVED INVALID QA Contact: Security Team bot <security-team>
Severity: Major    
Priority: P3 - Medium CC: camila.matos, security-team, smash_bz
Version: Leap 15.6   
Target Milestone: ---   
Hardware: Other   
OS: Other   
URL: https://smash.suse.de/issue/410664/
Whiteboard:
Found By: Security Response Team Services Priority:
Business Priority: Blocker: ---
Marketing QA Status: --- IT Deployment: ---
Bug Depends on:    
Bug Blocks: 1226342    

Description Camila Camargo de Matos 2024-06-14 14:24:01 UTC 
+++ This bug was initially created as a clone of Bug #1226342 +++

A vulnerability was found in libyaml up to 0.2.5. Affected by this issue is the function yaml_event_delete of the file /src/libyaml/src/api.c. The manipulation leads to a double-free.

References:
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2024-35325
https://www.cve.org/CVERecord?id=CVE-2024-35325
https://github.com/idhyt/pocs/blob/main/libyaml/CVE-2024-35325.c
https://bugzilla.redhat.com/show_bug.cgi?id=2292350
Comment 2 Camila Camargo de Matos 2024-06-14 15:29:30 UTC 
Although petsc embeds a copy of libyaml (since version 3.15), the upstream README file present in the directory where the libyaml code can be found [0] states that 
this copy is partial, and does not include the "emitter API and other output-related parts".

openSUSE:Factory/petsc does not seem to include any of the functions listed in the POC step-by-step [1], meaning this bug will be closed as petsc seems to not be affected by the vulnerability considered here.

[0] https://gitlab.com/petsc/petsc/-/blob/main/src/sys/yaml/README.md?ref_type=heads
[1] https://github.com/idhyt/pocs/blob/main/libyaml/CVE-2024-35325.c