9.3
CVSSv2

CVE-2019-9686

Published: 11/03/2019 Updated: 12/03/2019
CVSS v2 Base Score: 9.3 | Impact Score: 10 | Exploitability Score: 8.6
CVSS v3 Base Score: 9.8 | Impact Score: 5.9 | Exploitability Score: 3.9
VMScore: 828
Vector: AV:N/AC:M/Au:N/C:C/I:C/A:C

Vulnerability Summary

pacman prior to 5.1.3 allows directory traversal when installing a remote package via a specified URL "pacman -U <url>" 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.

Vulnerability Trend

Vendor Advisories

Arch Linux Security Advisory ASA-201903-7 ========================================= Severity: High Date : 2019-03-11 CVE-ID : CVE-2019-9686 Package : pacman Type : arbitrary code execution Remote : Yes Link : securityarchlinuxorg/AVG-921 Summary ======= The package pacman before version 513-1 is vulnerable to arbitrary cod ...
pacman prior to version 513 allows directory traversal when installing a remote package via a specified URL "pacman -U &lt;url&gt;" 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 con ...