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CVE-2021-40648

Date: September 9, 2022

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.

Language: C

Severity Score

Related Resources (6)

http://na.com
https://gist.github.com/untaman/cb58123fe89fc65e3984165db5d40933
https://security-tracker.debian.org/tracker/CVE-2021-40648
http://man2html.com
https://nvd.nist.gov/vuln/detail/CVE-2021-40648
https://www.mend.io/vulnerability-database/CVE-2021-40648

Severity Score

Weakness Type (CWE)

Input Validation

CWE-20

CVSS v3.1

Base Score:
Attack Vector (AV): LOCAL
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): REQUIRED
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

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