CVE-2021-40647

Public Exploit

Description

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.

Category

5.5
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.02%
Third-Party Advisory github.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://gist.github.com/untaman/cb58123fe89fc65e3984165db5d40933 third party advisory exploit

Frequently Asked Questions

What is the severity of CVE-2021-40647?
CVE-2021-40647 has been scored as a medium severity vulnerability.
How to fix CVE-2021-40647?
To fix CVE-2021-40647, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-40647 being actively exploited in the wild?
It is possible that CVE-2021-40647 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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