CVE-2020-9273: Use After Free
First published: Thu Feb 20 2020(Updated: )
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.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| debian/proftpd-dfsg | 1.3.6-4+deb10u6 1.3.6-4+deb10u4 1.3.7a+dfsg-12+deb11u2 1.3.8+dfsg-4+deb12u1 1.3.8+dfsg-8 | |
| debian/proftpd-dfsg | <=1.3.5b-4+deb9u3<=1.3.6-1<=1.3.5b-1<=1.3.6-4+deb10u3 | 1.3.6c-1 1.3.5b-4+deb9u4 1.3.6-4+deb10u4 |
| Proftpd Proftpd | =1.3.7 | |
| Debian Debian Linux | =8.0 | |
| Debian Debian Linux | =9.0 | |
| Debian Debian Linux | =10.0 | |
| Fedoraproject Fedora | =30 | |
| Fedoraproject Fedora | =31 | |
| openSUSE Backports SLE | =15.0 | |
| openSUSE Backports SLE | =15.0-sp1 | |
| openSUSE Leap | =15.1 | |
| Siemens Simatic Net Cp 1545-1 Firmware | ||
| Siemens Simatic Net Cp 1545-1 | ||
| Siemens Simatic Net Cp 1543-1 Firmware | <3.0 | |
| Siemens Simatic Net Cp 1543-1 |
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Reference Links
- https://github.com/proftpd/proftpd/issues/903
- https://github.com/proftpd/proftpd/commit/d388f7904d4c9a6d0ea54237b8b54a57c19d8d49
- https://github.com/proftpd/proftpd/commit/f8047a1ed0e0eb15193f555c4cbbb281e705c5c3
- https://github.com/proftpd/proftpd/commit/e845abc1bd86eebec7a0342fded908a1b0f1996b
- https://github.com/proftpd/proftpd/commit/cd9036f4ef7a05c107f0ffcb19a018b20267c531
- https://security-tracker.debian.org/tracker/CVE-2020-9273
- http://counter.li.org
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=951800
- 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/2021/09/06/2
- https://cert-portal.siemens.com/productcert/pdf/ssa-679335.pdf
- https://github.com/proftpd/proftpd/blob/master/RELEASE_NOTES
- https://lists.debian.org/debian-lts-announce/2020/02/msg00022.html
- https://lists.debian.org/debian-lts-announce/2020/03/msg00002.html
- 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://www.debian.org/security/2020/dsa-4635
- 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/VCUPRYSJR7XOM3HQ6H5M4OGDU7OHCHBF/
Frequently Asked Questions
What is the vulnerability ID for this ProFTPD vulnerability?
The vulnerability ID is CVE-2020-9273.
What is the severity of CVE-2020-9273?
CVE-2020-9273 has a severity rating of critical (8.8).
What software versions are affected by CVE-2020-9273?
ProFTPD versions 1.3.7 and prior are affected.
How can CVE-2020-9273 be exploited?
CVE-2020-9273 can be exploited by interrupting the data transfer channel in ProFTPD 1.3.7, which triggers a use-after-free vulnerability and may lead to remote code execution.
Is there a fix available for CVE-2020-9273?
Yes, the fix for CVE-2020-9273 is included in ProFTPD versions 1.3.7a, 1.3.8, and later.
- collector/security-tracker-debian
- collector/debian-bugs
- alias/CVE-2020-9273
- agent/type
- agent/first-publish-date
- agent/last-modified-date
- collector/nvd-index
- agent/software-canonical-lookup-request
- agent/severity
- agent/references
- agent/author
- agent/weakness
- agent/softwarecombine
- agent/tags
- agent/description
- agent/event
- collector/mitre-cve
- source/MITRE
- package-manager/debian
- vendor/proftpd
- canonical/proftpd proftpd
- version/proftpd proftpd/1.3.7
- vendor/debian
- canonical/debian debian linux
- version/debian debian linux/8.0
- version/debian debian linux/9.0
- version/debian debian linux/10.0
- vendor/fedoraproject
- canonical/fedoraproject fedora
- version/fedoraproject fedora/30
- version/fedoraproject fedora/31
- vendor/opensuse
- canonical/opensuse backports sle
- version/opensuse backports sle/15.0
- version/opensuse backports sle/15.0-sp1
- canonical/opensuse leap
- version/opensuse leap/15.1
- vendor/siemens
- canonical/siemens simatic net cp 1545-1 firmware
- canonical/siemens simatic net cp 1545-1
- canonical/siemens simatic net cp 1543-1 firmware
- canonical/siemens simatic net cp 1543-1