CVE-2021-36159 — CRITICAL (9.1)

Q: How severe is CVE-2021-36159?

CVE-2021-36159 has been rated CRITICAL with a CVSS base score of 9.1/10. This is considered a critical vulnerability requiring immediate attention.

Q: Is there a patch for CVE-2021-36159?

Check the references section above for vendor advisories and patch information. Affected products include: Freebsd Libfetch.

Vulnerability 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.

CVSS Score

9.1

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

NONE

Availability

HIGH

Affected Products

Vendor	Product	Versions
Freebsd	Libfetch	< 2021-07-26

Related Weaknesses (CWE)

CWE-125

References

FAQ

What is CVE-2021-36159?

CVE-2021-36159 is a vulnerability with a CVSS score of 9.1 (CRITICAL). 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 ...

How severe is CVE-2021-36159?

CVE-2021-36159 has been rated CRITICAL with a CVSS base score of 9.1/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2021-36159?

Check the references section above for vendor advisories and patch information. Affected products include: Freebsd Libfetch.