CVE-2019-9686 Path traversal in n/a
A malicious server can exploit unsanitized Content-Disposition headers to write files anywhere, enabling arbitrary root code execution.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2019-9686?
CVE-2019-9686 is a high-severity path traversal vulnerability in n/a, published on 11 Mar 2019. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
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.
Weakness: CWE-22
Which versions are affected by CVE-2019-9686?
It affects 1 product.
Products include Pacman Project Pacman.
How do I fix CVE-2019-9686?
No fix has been published for CVE-2019-9686 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2019-9686 being exploited?
There is no known exploitation of CVE-2019-9686 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as CVE-2019-1010309, GHSA-2fr8-9j8m-w8vx.