Bug 2005477 (CVE-2020-21533) - CVE-2020-21533 transfig: stack-based buffer overflow in the read_textobject() in read.c
Summary: CVE-2020-21533 transfig: stack-based buffer overflow in the read_textobject()...
Keywords:
Status: CLOSED WONTFIX
Alias: CVE-2020-21533
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Nobody
QA Contact:
URL:
Whiteboard:
Depends On: 2005921
Blocks: 2005482
TreeView+ depends on / blocked
 
Reported: 2021-09-17 18:19 UTC by Guilherme de Almeida Suckevicz
Modified: 2023-12-13 13:40 UTC (History)
5 users (show)

Fixed In Version:
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Doc Text:
In transfig's fig2dev 3.2.7b it is possible for an attacker to create a specially crafted file that causes a buffer overflow due to the usage of fgets. This leads to a denial of service, impacting availability of the program.
Clone Of:
Environment:
Last Closed: 2023-12-13 13:40:32 UTC
Embargoed:

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Description Guilherme de Almeida Suckevicz 2021-09-17 18:19:00 UTC 
fig2dev 3.2.7b contains a stack buffer overflow in the read_textobject function in read.c.

Reference:
https://sourceforge.net/p/mcj/tickets/59/
Comment 1 Garrett Tucker 2021-09-20 13:43:22 UTC 
After analysis of this flaw, all versions of RHEL 8 are affected. RHEL 9 remains unaffected as the patch to fix this flaw was applied and introduced in RHEL 9. The patch applied is: https://sourceforge.net/p/mcj/fig2dev/ci/41b9bb838a3d544539f6e68aa4f87d70ef7d45ce/. This flaw was caused by the use of fgets which led to a buffer overflow and segmentation fault in read_objects when a specially crafted file was used as input to the program.
Comment 3 Garrett Tucker 2021-10-19 17:11:48 UTC 
Analysis did not show any sign of being able to achieve code execution with this flaw. The flaw present caused a denial of service to the program affecting availability, but with no found effects on Integrity or Confidentiality of data. As such the CVSS score should be 5.5/CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
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