CVE-2019-9686 - log back

CVE-2019-9686 created at 25 Sep 2019 19:31:40
Severity
+ High
Remote
+ Remote
Type
+ Arbitrary code execution
Description
+ pacman prior to version 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.
References
+ 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
Notes