CVE-2020-12695 Information

Description

The Open Connectivity Foundation UPnP specification before 2020-04-17 does not forbid the acceptance of a subscription request with a delivery URL on a different network segment than the fully qualified event-subscription URL aka the CallStranger issue.

CVSS Vector

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

Reference

http://packetstormsecurity.com/files/158051/CallStranger-UPnP-Vulnerability-Checker.html http://www.openwall.com/lists/oss-security/2020/06/08/2 https://corelight.blog/2020/06/10/detecting-the-new-callstranger-upnp-vulnerability-with-zeek/ https://github.com/corelight/callstranger-detector https://github.com/yunuscadirci/CallStranger https://lists.debian.org/debian-lts-announce/2020/08/msg00011.html https://lists.debian.org/debian-lts-announce/2020/08/msg00013.html https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/L3SHL4LOFGHJ3DIXSUIQELGVBDJ7V7LB/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MZDWHKGN3LMGSUEOAAVAMOD3IUIPJVOJ/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RQEYVY4D7LASH6AI4WK3IK2QBFHHF3Q2/ https://usn.ubuntu.com/4494-1/ https://www.callstranger.com https://www.kb.cert.org/vuls/id/339275 https://www.tenable.com/blog/cve-2020-12695-callstranger-vulnerability-in-universal-plug-and-play-upnp-puts-billions-of

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

CHANGED

Integrity Impact

LOW

Availability Impact

NONE

Base Score

HIGH

Base Severity

7.5