Bug 2121292 (CVE-2021-33644) - CVE-2021-33644 libtar: out-of-bounds read in gnu_longname
Summary: CVE-2021-33644 libtar: out-of-bounds read in gnu_longname
Keywords:
Status: NEW
Alias: CVE-2021-33644
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: 2121325 2121300
Blocks: 2117835
TreeView+ depends on / blocked
 
Reported: 2022-08-25 05:11 UTC by Sandipan Roy
Modified: 2022-08-25 16:25 UTC (History)
3 users (show)

Fixed In Version:
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A flaw was found in libtar. This flaw allows an attacker who submits a crafted tar file with size in header struct being 0 to trigger a calling of malloc(0) for a variable gnu_longname, causing an out-of-bounds read.
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Description Sandipan Roy 2022-08-25 05:11:32 UTC 
An attacker who submits a crafted tar file with size in header struct being 0 may be able to trigger an calling of malloc(0) for a variable gnu_longname, causing an out-of-bounds read.

https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2022-1807
Comment 1 Sandipan Roy 2022-08-25 05:19:32 UTC 
Created libtar tracking bugs for this issue:

Affects: fedora-all [bug 2121300]
Comment 3 Kamil Dudka 2022-08-25 15:03:36 UTC 
The security fixes in question seem to be available in this source RPM package: https://repo.openeuler.org/openEuler-22.03-LTS/update/source/Packages/libtar-1.2.20-21.oe2203.src.rpm
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