Information disclosure in Parallels Remote Application Server
CVE-2020-35710
Parallels Remote Application Server (RAS) 18 allows remote attackers to discover an intranet IP address because submission of the login form (even with blank credentials) provides this address to the attacker's client for use as a "host" value. In other words, after an attacker's web browser sent a request to the login form, it would automatically send a second request to a RASHTML5Gateway/socket.io URI with something like "host":"192.168.###.###" in the POST data.
Vulnerability class: Information Disclosure
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.017 (76.2th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 76th percentile — 76.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.017 · newest: 0.017 · change: +0.000
Affected products
- Parallels Remote Application Server — versions 18.0
Weakness classification (CWE)
References
- www.elladodelmal.com/2020/12/blue-team-red-team-como-parallels-ras.html (Exploit, Third Party Advisory)
- twitter.com/amadapa/status/1342407005110218753 (Third Party Advisory)
Frequently asked questions
- What is CVE-2020-35710?
- CVE-2020-35710 is a medium-severity vulnerability in Parallels Remote Application Server, classified under Information Disclosure. CVSS score: 5.3/10. Published 2020-12-25.
- How severe is CVE-2020-35710?
- Medium severity. CVSS v3 base score is 5.3 out of 10.