CVE-2018-7549 Null dereference in n/a

What is CVE-2018-7549?

CVE-2018-7549 is a high-severity vulnerability in Canonical Ubuntu Linux, published on 27 Feb 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

In params.c in zsh through 5.4.2, there is a crash during a copy of an empty hash table, as demonstrated by typeset -p.

Weakness: CWE-20

Which versions are affected by CVE-2018-7549?

It affects 5 products.

Products include Canonical Ubuntu Linux, Redhat Enterprise Linux Desktop, Redhat Enterprise Linux Server, Redhat Enterprise Linux Workstation, Zsh Zsh.

How do I fix CVE-2018-7549?

Apply the vendor's patch.

Is CVE-2018-7549 being exploited?

There is no known exploitation of CVE-2018-7549 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 DEBIAN-CVE-2018-7549, GHSA-mfcw-g327-phj2, UBUNTU-CVE-2018-7549.