CVE-2018-1071 Memory corruption in zsh

What is CVE-2018-1071?

CVE-2018-1071 is a medium-severity memory corruption vulnerability in Canonical Ubuntu Linux, published on 9 Mar 2018. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

zsh through version 5.4.2 is vulnerable to a stack-based buffer overflow in the exec.c:hashcmd() function. A local attacker could exploit this to cause a denial of service.

Weakness: CWE-787, CWE-121

Which versions are affected by CVE-2018-1071?

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-2018-1071?

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-2018-1071 being exploited?

There is no known exploitation of CVE-2018-1071 in the wild and no public exploit code.

Other vulnerabilities in Canonical Ubuntu Linux

• CVE-2020-11651 SaltStack Salt Authentication Bypass Exploited Critical 9.8
• CVE-2020-7247 OpenSMTPD Remote Code Execution Exploited Critical 9.8
• CVE-2019-16928 Exim Out-of-bounds Write Exploited Critical 9.8
• CVE-2018-6789 Exim Buffer Overflow Exploited Critical 9.8
• CVE-2015-2590 Oracle Java SE and Java SE Embedded Remote Code Execution Exploited Critical 9.8

All Canonical Ubuntu Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as ALPINE-CVE-2018-1071, DEBIAN-CVE-2018-1071, GHSA-xc49-qj7m-vpp4, UBUNTU-CVE-2018-1071.