CVE-2020-35710 — MEDIUM (5.3)

Vulnerability Description

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.

CVSS Score

5.3

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

LOW

Integrity

NONE

Availability

NONE

Affected Products

Vendor	Product	Versions
Parallels	Remote Application Server	18.0

Related Weaknesses (CWE)

CWE-200

References

https://twitter.com/amadapa/status/1342407005110218753Third Party Advisory
https://www.elladodelmal.com/2020/12/blue-team-red-team-como-parallels-ras.htmlExploitThird Party Advisory
https://twitter.com/amadapa/status/1342407005110218753Third Party Advisory
https://www.elladodelmal.com/2020/12/blue-team-red-team-como-parallels-ras.htmlExploitThird Party Advisory

FAQ

What is CVE-2020-35710?

CVE-2020-35710 is a vulnerability with a CVSS score of 5.3 (MEDIUM). 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 ...

How severe is CVE-2020-35710?

CVE-2020-35710 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2020-35710?

Check the references section above for vendor advisories and patch information. Affected products include: Parallels Remote Application Server.