Bug 2126075 (CVE-2021-40648) - CVE-2021-40648 sys-apps/man2html: multiple vulnerabilities
Summary: CVE-2021-40648 sys-apps/man2html: multiple vulnerabilities
Keywords:
Status: CLOSED UPSTREAM
Alias: CVE-2021-40648
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: 2126815 2126816
Blocks:
TreeView+ depends on / blocked
 
Reported: 2022-09-12 11:04 UTC by ybuenos
Modified: 2022-11-26 13:25 UTC (History)
5 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed: 2022-11-26 13:25:33 UTC
Embargoed:

Attachments (Terms of Use)

Description ybuenos 2022-09-12 11:04:48 UTC 
CVE-2021-40648:

In man2html 1.6g, a filename can be created to overwrite the previous size parameter of the next chunk and the fd, bk, fd_nextsize, bk_nextsize of the current chunk. The next chunk is then freed later on, causing a freeing of an arbitrary amount of memory.

https://gist.github.com/untaman/cb58123fe89fc65e3984165db5d40933
Comment 1 ybuenos 2022-09-14 13:33:15 UTC 
Created man2html tracking bugs for this issue:

Affects: epel-all [bug 2126815]
Affects: fedora-all [bug 2126816]
Comment 2 Product Security DevOps Team 2022-11-26 13:25:31 UTC 
This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.
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