Use After Free in Proftpd
CVE-2020-9273
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.
Vulnerability class: Use-After-Free
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.120 (96.0th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 96th percentile — 96.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.120 · newest: 0.120 · change: 0.000
Affected products
- Proftpd — versions 1.3.7
- Siemens Simatic Net Cp 1543-1
- Siemens Simatic Net Cp 1543-1 Firmware
- Siemens Simatic Net Cp 1545-1
- Siemens Simatic Net Cp 1545-1 Firmware
- Debian Linux — versions 8.0, 9.0, 10.0
- Fedoraproject Fedora — versions 30, 31
- openSUSE Backports Sle — versions 15.0
- openSUSE Leap — versions 15.1
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/proftpd/proftpd/blob/master/RELEASE_NOTES (Third Party Advisory, Release Notes)
- github.com/proftpd/proftpd/issues/903 (Third Party Advisory)
- lists.debian.org/debian-lts-announce/2020/02/msg00022.html (mailing-list, Mailing List, Third Party Advisory)
- www.debian.org/security/2020/dsa-4635 (vendor-advisory, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.opensuse.org/opensuse-security-announce/2020-03/msg00002.html (vendor-advisory, Mailing List, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2020/03/msg00002.html (mailing-list, Mailing List, Third Party Advisory)
- security.gentoo.org/glsa/202003-35 (vendor-advisory, Third Party Advisory)
- cert-portal.siemens.com/productcert/pdf/ssa-679335.pdf (Third Party Advisory)
Frequently asked questions
- What is CVE-2020-9273?
- CVE-2020-9273 is a high-severity vulnerability in Proftpd, classified under Use After Free. CVSS score: 8.8/10. Published 2020-02-20.
- How severe is CVE-2020-9273?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2020-9273 known to be exploited?
- 13 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.