CVE-2019-9686: pacman before 5.1.3 allows directory traversal when installing a remote package via a specified URL "pacman -U " due to an unsanitized file name received from…

PriorityP346high8.8CVSS 3.1

AVNACLPRNUIRSUCHIHAH

EPSS

3.39%

87.3th percentile

pacman before 5.1.3 allows directory traversal when installing a remote package via a specified URL "pacman -U " due to an unsanitized file name received from a Content-Disposition header. pacman renames the downloaded package file to match the name given in this header. However, pacman did not sanitize this name, which may contain slashes, before calling rename(). A malicious server (or a network MitM if downloading over HTTP) can send a Content-Disposition header to make pacman place the file anywhere in the filesystem, potentially leading to arbitrary root code execution. Notably, this bypasses pacman's package signature checking. This occurs in curl_download_internal in lib/libalpm/dload.c.

Affected

1 ranges

Vendor	Product	Version range	Fixed in
pacman_project	pacman	< 5.1.3	5.1.3

CVSS provenance

nvdv3.18.8HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

nvdv2.09.3CRITICALAV:N/AC:M/Au:N/C:C/I:C/A:C

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