CVE-2018-1083 Memory corruption in zsh
A local attacker can trigger a buffer overflow in Zsh autocomplete via a crafted path, leading to code execution and potential privilege escalation.
- 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-2018-1083?
CVE-2018-1083 is a high-severity memory corruption vulnerability in Canonical Ubuntu Linux, published on 28 Mar 2018. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Zsh before version 5.4.2-test-1 is vulnerable to a buffer overflow in the shell autocomplete functionality. A local unprivileged user can create a specially crafted directory path which leads to code execution in the context of the user who tries to use autocomplete to traverse the before mentioned path. If the user affected is privileged, this leads to privilege escalation.
Which versions are affected by CVE-2018-1083?
It affects 6 products.
Products include Canonical Ubuntu Linux, Debian Debian Linux, Redhat Enterprise Linux Desktop, Redhat Enterprise Linux Server, Redhat Enterprise Linux Workstation, Zsh Zsh.
How do I fix CVE-2018-1083?
Upgrade to a fixed version.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2018-1083 being exploited?
There is no known exploitation of CVE-2018-1083 in the wild and no public exploit code.
Other vulnerabilities in Canonical Ubuntu Linux
Sources
Also known as ALPINE-CVE-2018-1083, DEBIAN-CVE-2018-1083, GHSA-pqpc-3fmx-3wqw, UBUNTU-CVE-2018-1083.