RCE in Digint Btrbk
CVE-2021-38173
Btrbk before 0.31.2 allows command execution because of the mishandling of remote hosts filtering SSH commands using ssh_filter_btrbk.sh in authorized_keys.
Vulnerability class: Command Injection (OS Command Injection)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.032 (87.5th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 88th percentile — 87.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.032 · newest: 0.032 · change: 0.000
Affected products
- Digint Btrbk
- Debian Linux — versions 9.0
- Fedoraproject Fedora — versions 34, 35
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/digint/btrbk/commit/58212de771c381cd4fa05625927080bf264e9584 (Patch, Third Party Advisory)
- github.com/digint/btrbk/blob/master/ChangeLog (Third Party Advisory, Release Notes)
- lists.debian.org/debian-lts-announce/2021/09/msg00002.html (mailing-list, Mailing List, 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)
Frequently asked questions
- What is CVE-2021-38173?
- CVE-2021-38173 is a critical-severity vulnerability in Digint Btrbk, classified under Command Injection. CVSS score: 9.8/10. Published 2021-08-07.
- How severe is CVE-2021-38173?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2021-38173 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.