Use After Free The advisory has been revoked - it doesn't affect any version of package proftpd-dfsg (opens in a new tab)
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applications- Snyk IDSNYK-UBUNTU2004-PROFTPDDFSG-634661
- published21 Feb 2020
- disclosed20 Feb 2020
Introduced: 20 Feb 2020
CVE-2020-9273 (opens in a new tab)Amendment
The Ubuntu security team deemed this advisory irrelevant for Ubuntu:20.04.
NVD Description
Note: Versions mentioned in the description apply only to the upstream proftpd-dfsg package and not the proftpd-dfsg package as distributed by Ubuntu.
In ProFTPD 1.3.7, it is possible to corrupt the memory pool by interrupting the data transfer channel. This triggers a use-after-free in alloc_pool in pool.c, and possible remote code execution.
References
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2020-9273
- https://cert-portal.siemens.com/productcert/pdf/ssa-679335.pdf
- https://github.com/proftpd/proftpd/blob/master/RELEASE_NOTES
- https://www.debian.org/security/2020/dsa-4635
- https://lists.debian.org/debian-lts-announce/2020/02/msg00022.html
- https://security-tracker.debian.org/tracker/CVE-2020-9273
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VCUPRYSJR7XOM3HQ6H5M4OGDU7OHCHBF/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XHO3S5WPRRP7VGKIAHLYQVEYW5HRYIJN/
- https://security.gentoo.org/glsa/202003-35
- https://github.com/proftpd/proftpd/issues/903
- https://lists.debian.org/debian-lts-announce/2020/03/msg00002.html
- http://www.openwall.com/lists/oss-security/2021/08/25/1
- http://www.openwall.com/lists/oss-security/2021/09/06/2
- http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00002.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VCUPRYSJR7XOM3HQ6H5M4OGDU7OHCHBF/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XHO3S5WPRRP7VGKIAHLYQVEYW5HRYIJN/
- https://github.com/dukptkey/CVE-2020-9273