RCE in Mailcow Mailcow\
CVE-2022-31138
mailcow is a mailserver suite. Prior to mailcow-dockerized version 2022-06a, an extended privilege vulnerability can be exploited by manipulating the custom parameters regexmess, skipmess, regexflag, delete2foldersonly, delete2foldersbutnot, regextrans2, pipemess, or maxlinelengthcmd to execute arbitrary code. Users should update their mailcow instances with the `update.sh` script in the mailcow root directory to 2022-06a or newer to receive a patch for this issue. As a temporary workaround, the Syncjob ACL can be removed from all mailbox users, preventing changes to those settings.
Vulnerability class: Command Injection (OS Command Injection)
EPSS: 0.033 (87.7th percentile) — read the EPSS interpretation.
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.
Affected products
- Mailcow Mailcow\ — versions _dockerized
- Mailcow Mailcow-dockerized — versions < 2022-06a
- Mailcow Mailcow\:_dockerized
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security-advisories@github.com (x_refsource_CONFIRM, Third Party Advisory, Mitigation)
- security-advisories@github.com (Patch, Third Party Advisory, x_refsource_MISC)
- security-advisories@github.com (Exploit, Third Party Advisory, x_refsource_MISC)
- security-advisories@github.com (Third Party Advisory, x_refsource_MISC, Release Notes)
Frequently asked questions
- What is CVE-2022-31138?
- CVE-2022-31138 is a high-severity vulnerability in Mailcow Mailcow\, classified under OS Command Injection. CVSS score: 8.8/10. Published 2022-07-11.
- How severe is CVE-2022-31138?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2022-31138 known to be exploited?
- 12 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.