CVE-2020-9274 Null dereference in n/a

What is CVE-2020-9274?

CVE-2020-9274 is a high-severity vulnerability in Canonical Ubuntu Linux, published on 26 Feb 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

An issue was discovered in Pure-FTPd 1.0.49. An uninitialized pointer vulnerability has been detected in the diraliases linked list. When the *lookup_alias(const char alias) or print_aliases(void) function is called, they fail to correctly detect the end of the linked list and try to access a non-existent list member. This is related to init_aliases in diraliases.c.

Weakness: CWE-824

Which versions are affected by CVE-2020-9274?

It affects 5 products.

Products include Canonical Ubuntu Linux, Debian Debian Linux, Fedoraproject Extra Packages for Enterprise Linux, Fedoraproject Fedora, Pureftpd Pure-Ftpd.

How do I fix CVE-2020-9274?

Apply the vendor's patch.

Is CVE-2020-9274 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2020-9274 exists.

Public exploit code: 1 Nuclei template.

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-2020-9274, DLA-2123-1, GHSA-26hm-gghq-x5rr, UBUNTU-CVE-2020-9274, USN-4515-1.