Home/CVE/The Open Connectivity Foundation UPnP specification before 2020-04-17 does not forbid the acceptance of a subscription r
CVE

CVE-2020-12695

The Open Connectivity Foundation UPnP specification before 2020-04-17 does not forbid the acceptance of a subscription r

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.

HIGH · CVSS 7.5 EPSS 0.03982
Act now
  • Public exploit or PoC is available
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-276Incorrect Default Permissions
▤

Affected Products & Versions

60
ui unifi controllerall versions
w1.fi hostapd< 2.0.0
asus rt-n11all versions
broadcom adslall versions
canon selphy cp1200all versions
cisco wap131all versions
cisco wap150all versions
cisco wap351all versions
⚠

Public Exploits & PoCs

1
pocpacketstormsecurity.com · CallStranger-UPnP-Vulnerability-Checker.htmlpacketstormsecurity.com
◈

Detection Rules (IDS/IPS)

2
et-openET SCAN UPnP SUBSCRIBE Inbound - Possible CallStranger Scan (CVE-2020-12695)attempted-recon
et-openET DOS CallStranger - Attempted UPnP Reflected Amplified TCP with Multiple Callbacks (CVE-2020-12695)attempted-dos
Open rulesets (ET Open, Snort Community, abuse.ch) link to source. Commercial rulesets are reference-only.
▣

Scoring & Timeline

7.5
HIGH · CVSS v3.1 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD08 Jun 2020 · 05:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:H
⚑

Vendor Advisories

14
suse-csafopenSUSE-SU-2024:10837-1
suse-csafopenSUSE-SU-2024:10846-1
suse-csafopenSUSE-SU-2024:11050-1
suse-csafopenSUSE-SU-2021:0545-1
suse-csafopenSUSE-SU-2021:0519-1
🔗

References & Sources

16
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://www.openwall.com/lists/oss-security/2020/06/08/2Mailing ListThird Party Advisory
https://corelight.blog/2020/06/10/detecting-the-new-callstranger-upnp-vulnerability-with-zeek/Third Party Advisory
https://github.com/corelight/callstranger-detectorThird Party Advisory
https://github.com/yunuscadirci/CallStrangerThird Party Advisory
https://lists.debian.org/debian-lts-announce/2020/08/msg00011.htmlThird Party Advisory
https://lists.debian.org/debian-lts-announce/2020/08/msg00013.htmlThird Party Advisory
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