Bug 2028122 (CVE-2021-3984) - CVE-2021-3984 vim: illegal memory access in find_start_brace() in cindent.c when C-indenting
Summary: CVE-2021-3984 vim: illegal memory access in find_start_brace() in cindent.c w...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2021-3984
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: 2028339 2028340 2028341 2028342 2029174 2029335 2029339
Blocks: 2028123
TreeView+ depends on / blocked
 
Reported: 2021-12-01 14:23 UTC by Michael Kaplan
Modified: 2022-05-17 09:50 UTC (History)
18 users (show)

Fixed In Version: vim 8.2.3625
Doc Type: If docs needed, set a value
Doc Text:
A flaw was found in vim. A possible heap-based buffer overflow allows an attacker to input a specially crafted file, leading to a crash or code execution. The highest threat from this vulnerability is confidentiality, integrity, and system availability.
Clone Of:
Environment:
Last Closed: 2022-02-01 22:01:13 UTC
Embargoed:

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Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2022:0366 0 None None None 2022-02-01 21:00:58 UTC

Description Michael Kaplan 2021-12-01 14:23:22 UTC 
vim is vulnerable to Heap-based Buffer Overflow. There is an illegal memory access when C-indenting.

References:

https://github.com/vim/vim/commit/2de9b7c7c8791da8853a9a7ca9c467867465b655
https://huntr.dev/bounties/b114b5a2-18e2-49f0-b350-15994d71426a
Comment 2 Sandipan Roy 2021-12-02 04:57:06 UTC 
Created vim tracking bugs for this issue:

Affects: fedora-all [bug 2028339]
Comment 5 errata-xmlrpc 2022-02-01 21:00:55 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2022:0366 https://access.redhat.com/errata/RHSA-2022:0366
Comment 6 Product Security DevOps Team 2022-02-01 22:01:10 UTC 
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2021-3984
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