Bug 1964012 (CVE-2021-28904) - CVE-2021-28904 libyang: NULL pointer dereference in ext_get_plugin()
Summary: CVE-2021-28904 libyang: NULL pointer dereference in ext_get_plugin()
Keywords:
Status: CLOSED WONTFIX
Alias: CVE-2021-28904
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1964013 1965256 1965257
Blocks: 1964021
TreeView+ depends on / blocked
 
Reported: 2021-05-24 14:41 UTC by Guilherme de Almeida Suckevicz
Modified: 2022-04-17 21:24 UTC (History)
2 users (show)

Fixed In Version: libyang 1.0.225
Clone Of:
Environment:
Last Closed: 2021-10-28 12:28:46 UTC
Embargoed:

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Description Guilherme de Almeida Suckevicz 2021-05-24 14:41:36 UTC 
In function ext_get_plugin() in libyang <= v1.0.225, it doesn't check whether the value of revision is NULL. If revision is NULL, the operation of strcmp(revision, ext_plugins[u].revision) will lead to a crash.

Reference:
https://github.com/CESNET/libyang/issues/1451
Comment 1 Guilherme de Almeida Suckevicz 2021-05-24 14:41:54 UTC 
Created libyang tracking bugs for this issue:

Affects: fedora-all [bug 1964013]
Comment 2 Riccardo Schirone 2021-05-27 09:39:01 UTC 
Upstream patch:
https://github.com/CESNET/libyang/commit/59a0bff1a5a2f0a0eac07e4bf94d4aea9dd3708d
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