1190379 – (CVE-2021-3770) VUL-0: CVE-2021-3770: vim: using retab with large value may lead to heap buffer overflow

Bug 1190379 (CVE-2021-3770) - VUL-0: CVE-2021-3770: vim: using retab with large value may lead to heap buffer overflow

Summary: VUL-0: CVE-2021-3770: vim: using retab with large value may lead to heap buff...

Status:	RESOLVED FIXED

Alias:	CVE-2021-3770

Product:	SUSE Security Incidents
Classification:	Novell Products
Component:	Incidents (show other bugs)
Version:	unspecified
Hardware:	Other Other

Priority:	P3 - Medium Severity: Major
Target Milestone:	---
Assignee:	Zoltan Balogh
QA Contact:	Security Team bot

URL:	https://smash.suse.de/issue/309124/
Whiteboard:	CVSSv3.1:SUSE:CVE-2021-3770:7.8:(AV:L...
Keywords:

Depends on:
Blocks:

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Reported:	2021-09-10 08:35 UTC by Gabriele Sonnu
Modified:	2022-02-18 11:15 UTC (History)
CC List:	2 users (show)

See Also:
Found By:	Security Response Team
Services Priority:
Business Priority:
Blocker:	---
Marketing QA Status:	---
IT Deployment:	---

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Description Gabriele Sonnu 2021-09-10 08:35:57 UTC

Invalid memory access when using :retab with large value may lead to Heap-based Buffer Overflow.

Upstream reference:

https://github.com/vim/vim/commit/b7081e135a16091c93f6f5f7525a5c58fb7ca9f9

References:
https://bugzilla.redhat.com/show_bug.cgi?id=2001929
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-3770
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3770
https://github.com/vim/vim/commit/b7081e135a16091c93f6f5f7525a5c58fb7ca9f9
https://huntr.dev/bounties/016ad2f2-07c1-4d14-a8ce-6eed10729365

Comment 1 Gabriele Sonnu 2021-09-10 15:21:33 UTC

The affected code is in the tabstop_set function, introduced in vim 8.1.0105.
We ship older version in the various SLE products, so these packages are not affected.
This vulnerability affects only openSUSE:Factory (v8.2.3360).

Upstream patch:
https://github.com/vim/vim/commit/b7081e135a16091c93f6f5f7525a5c58fb7ca9f9

Comment 2 Ondřej Súkup 2022-02-18 11:15:03 UTC

openSUSE:Factory has now version 8.2.4xxx+ so fixed