High severity · published Sep 7, 2017
CVE-2017-6791
A vulnerability in the Trust Verification Service (TVS) of Cisco Unified Communications Manager could allow an unauthenticated, remote attacker to cause a denial of service (DoS)…
7.5
CVSS
2.3%
EPSS
No
On KEV
Description
A vulnerability in the Trust Verification Service (TVS) of Cisco Unified Communications Manager could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to improper handling of Transport Layer Security (TLS) traffic by the affected software. An attacker could exploit this vulnerability by generating incomplete traffic streams. A successful exploit could allow the attacker to deny access to the TVS for an affected device, resulting in a DoS condition, until an administrator restarts the service. Known Affected Releases 10.0(1.10000.24) 10.5(2.10000.5) 11.0(1.10000.10) 9.1(2.10000.28). Cisco Bug IDs: CSCux21905.
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)2.3% · higher than 83% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
UC
Unified Communications Manager · Cisco
9.1(2.10000.28); 10.0(1.10000.24); 10.5(2.10000.5); 11.0(1.10000.10) · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2017-6791
CVE.org
https://www.cve.org/CVERecord?id=CVE-2017-6791
Third Party Advisory
http://www.securityfocus.com/bid/100662
Third Party Advisory
http://www.securitytracker.com/id/1039286
Vendor Advisory
https://quickview.cloudapps.cisco.com/quickview/bug/CSCux21905
Vendor Advisory
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170906-ucm
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