Vulnerability Details : CVE-2021-40647
Potential exploit
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.
Vulnerability category: Input validation
Products affected by CVE-2021-40647
- cpe:2.3:a:man2html_project:man2html:1.6g:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-40647
0.02%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 5 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-40647
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
5.5
|
MEDIUM | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H |
1.8
|
3.6
|
NIST |
CWE ids for CVE-2021-40647
-
The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.Assigned by: nvd@nist.gov (Primary)
References for CVE-2021-40647
-
https://gist.github.com/untaman/cb58123fe89fc65e3984165db5d40933
CVE-2021-40647 and CVE-2021-40648 ยท GitHubExploit;Third Party Advisory
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