Vulnerability in Solarwinds Serv-U
CVE-2021-25276
In SolarWinds Serv-U before 15.2.2 Hotfix 1, there is a directory containing user profile files (that include users' password hashes) that is world readable and writable. An unprivileged Windows user (having access to the server's filesystem) can add an FTP user by copying a valid profile file to this directory. For example, if this profile sets up a user with a C:\ home directory, then the attacker obtains access to read or replace arbitrary files with LocalSystem privileges.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.005 (38.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 38th percentile — 38.0% 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: 0.005 · change: 0.000
Affected products
- Solarwinds Serv-U — versions 15.2.2
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.trustwave.com/en-us/resources/blogs/spiderlabs-blog/full-system-control-wit… (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-25276?
- CVE-2021-25276 is a high-severity vulnerability in Solarwinds Serv-U, classified under Incorrect Permission Assignment for Critical Resource. CVSS score: 7.1/10. Published 2021-02-03.
- How severe is CVE-2021-25276?
- High severity. CVSS v3 base score is 7.1 out of 10.
- Is CVE-2021-25276 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.