Vulnerability in Fit2cloud Jumpserver
CVE-2023-43650
JumpServer is an open source bastion host. The verification code for resetting user's password is vulnerable to brute-force attacks due to the absence of rate limiting. JumpServer provides a feature allowing users to reset forgotten passwords. Affected users are sent a 6-digit verification code, ranging from 000000 to 999999, to facilitate the password reset. Although the code is only available in 1 minute, this window potentially allows for up to 1,000,000 validation attempts. This issue has been addressed in versions 2.28.20 and 3.7.1. Users are advised to upgrade. There are no known workarounds for this vulnerability.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N.
EPSS exploit prediction
EPSS: 0.006 (47.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 48th percentile — 47.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.006 · change: +0.001
Affected products
- Fit2cloud Jumpserver
- Jumpserver — versions >= 2.0.0, < 2.28.20, >= 3.0.0, < 3.7.1
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/jumpserver/jumpserver/security/advisories/GHSA-mwx4-8fwc-2xvw (Exploit, Vendor Advisory)
- www.sonarsource.com/blog/diving-into-jumpserver-attackers-gateway-to-internal-n… (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2023-43650?
- CVE-2023-43650 is a high-severity vulnerability in Fit2cloud Jumpserver, classified under Weak Password Recovery Mechanism for Forgotten Password. CVSS score: 8.2/10. Published 2023-09-27.
- How severe is CVE-2023-43650?
- High severity. CVSS v3 base score is 8.2 out of 10.
- Is CVE-2023-43650 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.