CVE-2020-12695
High
CVE-2020-12695
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.
Exploit probability
15.2%
Published
June 8, 2020
Required by
Not available
Last source change
April 16, 2026
02 / AFFECTED SOFTWARE
Affected packages
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
Open Source Vulnerabilities
CVE-2020-12695
View original source
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.
05 / REFERENCES
Further evidence
- 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.debian.org/debian-lts-announce/2020/12/msg00017.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L3SHL4LOFGHJ3DIXSUIQELGVBDJ7V7LB/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MZDWHKGN3LMGSUEOAAVAMOD3IUIPJVOJ/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RQEYVY4D7LASH6AI4WK3IK2QBFHHF3Q2/
- https://usn.ubuntu.com/4494-1/
- https://www.callstranger.com
- https://www.debian.org/security/2020/dsa-4806
- https://www.debian.org/security/2021/dsa-4898
- 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