RCE in Zeroshell
CVE-2020-29390
Zeroshell 3.9.3 contains a command injection vulnerability in the /cgi-bin/kerbynet StartSessionSubmit parameter that could allow an unauthenticated attacker to execute a system command by using shell metacharacters and the %0a character.
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: 0.396 (98.6th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 99th percentile — 98.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.396 · newest: 0.396 · change: 0.000
Affected products
- Zeroshell — versions 3.9.3
Weakness classification (CWE)
Public proof-of-concept exploits
References
- blog.quake.so/post/zeroshell_linux_router_rce/ (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-29390?
- CVE-2020-29390 is a critical-severity vulnerability in Zeroshell, classified under OS Command Injection. CVSS score: 9.8/10. Published 2020-11-30.
- How severe is CVE-2020-29390?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2020-29390 known to be exploited?
- 5 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.