CVEvulnerability

CVE-2021-36159

9.1 CRITICAL Published 2021-08-03 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2021-08-03
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
9.1 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
CVSS 2.0 ([email protected])
6.4 MEDIUM — AV:N/AC:L/Au:N/C:P/I:N/A:P
Weaknesses
CWE-125

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 configurations

• freebsd libfetch (< 2021-07-26)

Related

Weakness · CWE (1)

  • CWE-125 Out-of-bounds Read weakness

References