What’s Vulnerable › Vulnerabilities
CVE-2020-9274
- Severity: high (CVSS 7.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 6.0% probability of exploitation in the next 30 days
- Public exploit or detection template: yes
- Published: 2020-02-26 · updated 2026-06-17
- Weakness: CWE-824
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.
Affected products
- Canonical Ubuntu Linux: 16.04
- Debian Linux: 8.0
- Fedoraproject Extra Packages For Enterprise Linux: 7.0, 8.0
- Fedoraproject Fedora: 30, 31, 32
- Pureftpd Pure-Ftpd: before 1.0.50 — fixed in 1.0.50
How to fix
Upgrade to a fixed version: Pureftpd Pure-Ftpd 1.0.50. Check the vendor advisory for mitigations.
References
- https://github.com/jedisct1/pure-ftpd/commit/8d0d42542e2cb7a56d645fbe4d0ef436e38bcefa
- https://lists.debian.org/debian-lts-announce/2020/02/msg00029.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/22P44PECZWNDP7CMBL7NRBMNFS73C5Z2/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/B5NSUDWXZVWUCL6R2PTX3KBB42Z62CA5/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U5DBVHJCXWRSJPNJQCJQCKZF6ZDPZCKA/
- https://security.gentoo.org/glsa/202003-54
- https://usn.ubuntu.com/4515-1/
- https://www.pureftpd.org/project/pure-ftpd/news/
- https://github.com/jedisct1/pure-ftpd/commit/8d0d42542e2cb7a56d645fbe4d0ef436e38bcefa
- https://lists.debian.org/debian-lts-announce/2020/02/msg00029.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/22P44PECZWNDP7CMBL7NRBMNFS73C5Z2/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/B5NSUDWXZVWUCL6R2PTX3KBB42Z62CA5/
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