Vulnerabilities > CVE-2020-9273 - Use After Free vulnerability in multiple products
Attack vector
NETWORK Attack complexity
LOW Privileges required
LOW Confidentiality impact
HIGH Integrity impact
HIGH Availability impact
HIGH Summary
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.
Vulnerable Configurations
| Part | Description | Count |
|---|---|---|
| Application | 1 | |
| Application | 2 | |
| OS | 3 | |
| OS | 2 | |
| OS | 1 | |
| OS | 3 | |
| Hardware | 2 |
Common Weakness Enumeration (CWE)
Nessus
NASL family Debian Local Security Checks NASL id DEBIAN_DLA-2115.NASL description It was discovered that there was a regression in a previous fix for a use-after-free vulnerability in the proftpd-dfsg FTP server. Exploitation of the original vulnerability within the memory pool handling could have allowed a remote attacker to execute arbitrary code on the affected system. However, the fix that was released in proftpd-dfsg version 1.3.5e+r1.3.5-2+deb8u6 had a regression around the handling of log formatting. For more information, please see : https://github.com/proftpd/proftpd/issues/903 For Debian 8 last seen 2020-03-17 modified 2020-02-24 plugin id 133876 published 2020-02-24 reporter This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/133876 title Debian DLA-2115-2 : proftpd-dfsg regression update NASL family SuSE Local Security Checks NASL id OPENSUSE-2020-273.NASL description This update for proftpd fixes the following issues : proftpd was updated to version 1.3.6c. Security issues fixed : - CVE-2020-9272: Fixed an out-of-bounds read in mod_cap (bsc#1164572). - CVE-2020-9273: Fixed a potential memory corruption caused by an interruption of the data transfer channel (bsc#1164574). last seen 2020-03-18 modified 2020-03-02 plugin id 134196 published 2020-03-02 reporter This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/134196 title openSUSE Security Update : proftpd (openSUSE-2020-273) NASL family Gentoo Local Security Checks NASL id GENTOO_GLSA-202003-35.NASL description The remote host is affected by the vulnerability described in GLSA-202003-35 (ProFTPd: Multiple vulnerabilities) Multiple vulnerabilities have been discovered in ProFTPd. Please review the CVE identifiers referenced below for details. Impact : A remote attacker, by interrupting the data transfer channel, could possibly execute arbitrary code with the privileges of the process or cause a Denial of Service condition. Workaround : There is no known workaround at this time. last seen 2020-03-21 modified 2020-03-18 plugin id 134641 published 2020-03-18 reporter This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/134641 title GLSA-202003-35 : ProFTPd: Multiple vulnerabilities NASL family Fedora Local Security Checks NASL id FEDORA_2020-76C707CFF0.NASL description This update, to the current upstream stable release version, is a cumulative bug-fix release including a security fix for a use-after-free vulnerability (CVE-2020-9273): successful exploitation of this vulnerability could allow a remote attacker to execute arbitrary code on the affected system. Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-03-18 modified 2020-02-28 plugin id 134135 published 2020-02-28 reporter This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/134135 title Fedora 30 : proftpd (2020-76c707cff0) NASL family Debian Local Security Checks NASL id DEBIAN_DSA-4635.NASL description Antonio Morales discovered an use-after-free flaw in the memory pool allocator in ProFTPD, a powerful modular FTP/SFTP/FTPS server. Interrupting current data transfers can corrupt the ProFTPD memory pool, leading to denial of service, or potentially the execution of arbitrary code. last seen 2020-03-17 modified 2020-02-27 plugin id 134095 published 2020-02-27 reporter This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/134095 title Debian DSA-4635-1 : proftpd-dfsg - security update NASL family Fedora Local Security Checks NASL id FEDORA_2020-876B1F664E.NASL description This update, to the current upstream stable release version, is a cumulative bug-fix release including a security fix for a use-after-free vulnerability (CVE-2020-9273): successful exploitation of this vulnerability could allow a remote attacker to execute arbitrary code on the affected system. Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-03-18 modified 2020-02-28 plugin id 134137 published 2020-02-28 reporter This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/134137 title Fedora 31 : proftpd (2020-876b1f664e)
References
- http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00002.html
- http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00002.html
- http://www.openwall.com/lists/oss-security/2021/08/25/1
- http://www.openwall.com/lists/oss-security/2021/08/25/1
- http://www.openwall.com/lists/oss-security/2021/09/06/2
- http://www.openwall.com/lists/oss-security/2021/09/06/2
- https://cert-portal.siemens.com/productcert/pdf/ssa-679335.pdf
- https://cert-portal.siemens.com/productcert/pdf/ssa-679335.pdf
- https://github.com/proftpd/proftpd/blob/master/RELEASE_NOTES
- https://github.com/proftpd/proftpd/blob/master/RELEASE_NOTES
- https://github.com/proftpd/proftpd/issues/903
- https://github.com/proftpd/proftpd/issues/903
- https://lists.debian.org/debian-lts-announce/2020/02/msg00022.html
- https://lists.debian.org/debian-lts-announce/2020/02/msg00022.html
- https://lists.debian.org/debian-lts-announce/2020/03/msg00002.html
- https://lists.debian.org/debian-lts-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/VCUPRYSJR7XOM3HQ6H5M4OGDU7OHCHBF/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XHO3S5WPRRP7VGKIAHLYQVEYW5HRYIJN/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XHO3S5WPRRP7VGKIAHLYQVEYW5HRYIJN/
- https://security.gentoo.org/glsa/202003-35
- https://security.gentoo.org/glsa/202003-35
- https://www.debian.org/security/2020/dsa-4635
- https://www.debian.org/security/2020/dsa-4635