CVE-2018-19044 Path traversal in n/a
Local attackers can overwrite arbitrary files via symlink attacks in Keepalived if protected symlinks are disabled, requiring a patch.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2018-19044?
CVE-2018-19044 is a medium-severity path traversal vulnerability in n/a, published on 8 Nov 2018. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
keepalived 2.0.8 didn't check for pathnames with symlinks when writing data to a temporary file upon a call to PrintData or PrintStats. This allowed local users to overwrite arbitrary files if fs.protected_symlinks is set to 0, as demonstrated by a symlink from /tmp/keepalived.data or /tmp/keepalived.stats to /etc/passwd.
Weakness: CWE-59
Which versions are affected by CVE-2018-19044?
It affects 1 product.
Linux distribution packages (4)
keepalived Red Hat:enterprise_linux:7::server | All versions | 0:1.3.5-16.el7 |
keepalived-debuginfo Red Hat:enterprise_linux:7::server | All versions | 0:1.3.5-16.el7 |
keepalived Red Hat:enterprise_linux:7::workstation | All versions | 0:1.3.5-16.el7 |
keepalived-debuginfo Red Hat:enterprise_linux:7::workstation | All versions | 0:1.3.5-16.el7 |
Products include Keepalived Keepalived.
How do I fix CVE-2018-19044?
Apply the vendor's patch.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2018-19044 being exploited?
There is no known exploitation of CVE-2018-19044 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as DEBIAN-CVE-2018-19044, GHSA-2357-m5j6-6jv3, RHSA-2019:2285, UBUNTU-CVE-2018-19044.