Vulnerability Monitor

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CVE-2019-9686

pacman before 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.

Published

2019-03-11T16:29:00.283

Last Modified

2024-11-21T04:52:06.510

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 8.8 (HIGH)

CVSSv2 Vector

AV:N/AC:M/Au:N/C:C/I:C/A:C

Access Vector: NETWORK
Access Complexity: MEDIUM
Authentication: NONE
Confidentiality Impact: COMPLETE
Integrity Impact: COMPLETE
Availability Impact: COMPLETE

Exploitability Score

8.6

Impact Score

10.0

Weaknesses

Type: Primary
CWE-22

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	pacman_project	pacman	< 5.1.3	Yes

References

https://git.archlinux.org/pacman.git/commit/?h=release/5.1.x&id=1bf767234363f7ad5933af3f7ce267c123017bde Mailing List, Third Party Advisory ([email protected])
https://git.archlinux.org/pacman.git/commit/?id=9702703633bec2c007730006de2aeec8587dfc84 Mailing List, Patch, Third Party Advisory ([email protected])
https://git.archlinux.org/pacman.git/commit/?id=d197d8ab82cf10650487518fb968067897a12775 Mailing List, Patch, Third Party Advisory ([email protected])
https://git.archlinux.org/pacman.git/commit/?h=release/5.1.x&id=1bf767234363f7ad5933af3f7ce267c123017bde Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://git.archlinux.org/pacman.git/commit/?id=9702703633bec2c007730006de2aeec8587dfc84 Mailing List, Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://git.archlinux.org/pacman.git/commit/?id=d197d8ab82cf10650487518fb968067897a12775 Mailing List, Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)