What’s Vulnerable › Vulnerabilities

CVE-2021-36159

Description

libfetch before 2021-07-26, as used in apk-tools, xbps, and other products, mishandles numeric strings for the FTP and HTTP protocols. The FTP passive mode implementation allows an out-of-bounds read because strtol is used to parse the relevant numbers into address bytes. It does not check if the line ends prematurely. If it does, the for-loop condition checks for the '\0' terminator one byte too late.

Affected products

How to fix

Upgrade to a fixed version: FreeBSD Libfetch 2021-07-26. Check the vendor advisory for mitigations.

References

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