Bug 2126073 (CVE-2021-40647) - CVE-2021-40647 sys-apps/man2html: multiple vulnerabilities
Summary: CVE-2021-40647 sys-apps/man2html: multiple vulnerabilities
Keywords:
Status: CLOSED UPSTREAM
Alias: CVE-2021-40647
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: 2126813 2126814
Blocks:
TreeView+ depends on / blocked
 
Reported: 2022-09-12 11:00 UTC by ybuenos
Modified: 2022-11-26 12:56 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 12:56:02 UTC
Embargoed:

Attachments (Terms of Use)

Description ybuenos 2022-09-12 11:00:59 UTC 
CVE-2021-40647:

In man2html 1.6g, a specific string being read in from a file will overwrite the size parameter in the top chunk of the heap. This at least causes the program to segmentation abort if the heap size parameter isn't aligned correctly. In version before GLIBC version 2.29 and aligned correctly, it allows arbitrary write anywhere in the programs memory.

https://gist.github.com/untaman/cb58123fe89fc65e3984165db5d40933
Comment 1 ybuenos 2022-09-14 13:33:00 UTC 
Created man2html tracking bugs for this issue:

Affects: epel-all [bug 2126813]
Affects: fedora-all [bug 2126814]
Comment 2 Product Security DevOps Team 2022-11-26 12:56:00 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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