Vulnerability · Published Nov 6, 2020 · Assigned by cisco
CVE-2020-27121Cisco Unified Communications Manager IM and Presence Service Denial of Service Vulnerability
Medium 4.3
In plain English
A medium-severity security flaw in Cisco Unified Communications Manager IM and Presence Service from Cisco. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.2% (higher than 67% of all known vulnerabilities).
Official description
A vulnerability in Cisco Unified Communications Manager IM & Presence Service (Unified CM IM&P) Software could allow an authenticated, remote attacker to cause the Cisco XCP Authentication Service on an affected device to restart, resulting in a denial of service (DoS) condition. The vulnerability is due to improper handling of login requests. An attacker could exploit this vulnerability by sending a crafted client login request to an affected device. A successful exploit could allow the attacker to cause a process to crash, resulting in a DoS condition for new login attempts. Users who are authenticated at the time of the attack would not be affected. There are workarounds that address this vulnerability.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Cisco | Cisco Unified Communications Manager IM and Presence Service | n/a |
Weakness: CWE-248 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
References
- 20201104 Cisco Unified Communications Manager IM and Presence Service Denial of Service Vulnerability vendor-advisory, x_refsource_CISCO