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CVE ID: CVE-2021-36159

Last updated: Oct. 18, 2021, 12:19 p.m.

Severity: MEDIUM

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.

Severity score: 4.9 Base score: 6.4 Exploitability score: 10.0 Confidentiality impact: PARTIAL Integrity impact: NONE User interaction required: False Published: Aug. 3, 2021, 2:15 p.m. Data type: CVE Data format: MITRE Assigner: cve@mitre.org Problem type: CWE-125 Reference url: https://gitlab.alpinelinux.org/alpine/apk-tools/-/issues/10749 Reference name: https://gitlab.alpinelinux.org/alpine/apk-tools/-/issues/10749 Reference source: MISC CVE version: 2.0 Vector string: AV:N/AC:L/Au:N/C:P/I:N/A:P Access vector: NETWORK Access complexity: LOW Authentication: NONE Base severity: AcInsf info: False Obtain all priviledges: False User privilege: False Other privilege: False

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