Vulnerability Details 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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.005
EPSS Ranking 65.8%
CVSS Severity
CVSS v3 Score 8.8
CVSS v2 Score 9.3
References
- https://git.archlinux.org/pacman.git/commit/?h=release/5.1.x&id=1bf767234363f7ad5933af3f7ce267c123017bde
- https://git.archlinux.org/pacman.git/commit/?id=9702703633bec2c007730006de2aeec8587dfc84
- https://git.archlinux.org/pacman.git/commit/?id=d197d8ab82cf10650487518fb968067897a12775
- https://git.archlinux.org/pacman.git/commit/?h=release/5.1.x&id=1bf767234363f7ad5933af3f7ce267c123017bde
- https://git.archlinux.org/pacman.git/commit/?id=9702703633bec2c007730006de2aeec8587dfc84
- https://git.archlinux.org/pacman.git/commit/?id=d197d8ab82cf10650487518fb968067897a12775
Products affected by CVE-2019-9686
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cpe:2.3:a:pacman_project:pacman:3.0.0
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cpe:2.3:a:pacman_project:pacman:3.0.1
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cpe:2.3:a:pacman_project:pacman:3.0.2
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cpe:2.3:a:pacman_project:pacman:3.0.3
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cpe:2.3:a:pacman_project:pacman:3.0.4
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cpe:2.3:a:pacman_project:pacman:3.0.5
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cpe:2.3:a:pacman_project:pacman:3.0.6
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cpe:2.3:a:pacman_project:pacman:3.1.0
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cpe:2.3:a:pacman_project:pacman:3.1.1
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cpe:2.3:a:pacman_project:pacman:3.1.2
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cpe:2.3:a:pacman_project:pacman:3.1.3
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cpe:2.3:a:pacman_project:pacman:3.1.4
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cpe:2.3:a:pacman_project:pacman:3.2.0
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cpe:2.3:a:pacman_project:pacman:3.2.1
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cpe:2.3:a:pacman_project:pacman:3.2.2
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cpe:2.3:a:pacman_project:pacman:3.3.0
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cpe:2.3:a:pacman_project:pacman:3.3.1
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cpe:2.3:a:pacman_project:pacman:3.3.2
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cpe:2.3:a:pacman_project:pacman:3.3.3
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cpe:2.3:a:pacman_project:pacman:3.4.0
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cpe:2.3:a:pacman_project:pacman:3.4.1
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cpe:2.3:a:pacman_project:pacman:3.4.2
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cpe:2.3:a:pacman_project:pacman:3.4.3
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cpe:2.3:a:pacman_project:pacman:3.5.0
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cpe:2.3:a:pacman_project:pacman:3.5.1
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cpe:2.3:a:pacman_project:pacman:3.5.2
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cpe:2.3:a:pacman_project:pacman:3.5.3
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cpe:2.3:a:pacman_project:pacman:3.5.4
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cpe:2.3:a:pacman_project:pacman:4.0.0
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cpe:2.3:a:pacman_project:pacman:4.0.1
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cpe:2.3:a:pacman_project:pacman:4.0.2
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cpe:2.3:a:pacman_project:pacman:4.0.3
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cpe:2.3:a:pacman_project:pacman:4.1.0
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cpe:2.3:a:pacman_project:pacman:4.1.1
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cpe:2.3:a:pacman_project:pacman:4.1.2
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cpe:2.3:a:pacman_project:pacman:4.2.0
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cpe:2.3:a:pacman_project:pacman:4.2.1
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cpe:2.3:a:pacman_project:pacman:5.0.0
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cpe:2.3:a:pacman_project:pacman:5.0.1
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cpe:2.3:a:pacman_project:pacman:5.0.2
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cpe:2.3:a:pacman_project:pacman:5.1.0
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cpe:2.3:a:pacman_project:pacman:5.1.1
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cpe:2.3:a:pacman_project:pacman:5.1.2