What is CVE-2017-3808?

CVE-2017-3808 is a high-severity vulnerability in Cisco Unified Communications Manager, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.5/10. Published 2017-04-20.

How severe is CVE-2017-3808?

High severity. CVSS v3 base score is 7.5 out of 10.

Buffer overflow in Cisco Unified Communications Manager

CVE-2017-3808

A vulnerability in the Session Initiation Protocol (SIP) UDP throttling process of Cisco Unified Communications Manager (Cisco Unified CM) could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to insufficient rate limiting protection. An attacker could exploit this vulnerability by sending the affected device a high rate of SIP messages. An exploit could allow the attacker to cause the device to reload unexpectedly. The device and services will restart automatically. This vulnerability affects Cisco Unified Communications Manager (CallManager) releases prior to the first fixed release; the following list indicates the first minor release that includes the fix for this vulnerability: 10.5.2.14900-16 11.0.1.23900-5 11.5.1.12900-2. Cisco Bug IDs: CSCuz72455.

Vulnerability class: Buffer Overflow

Published 2017-04-20 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.025 (84.3th percentile), scored 2026-10-20.

Low probability of exploitation in the next 30 days, but still tracked. 84th percentile — 84.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.025 · newest: 0.025 · change: 0.000

Affected products

Cisco Unified Communications Manager — versions 11.5\(1.12000.1\), 11.5(1.11007.2), 11.5(1.12000.1)
Cisco Unified Communications Manager — versions Cisco Unified Communications Manager

Weakness classification (CWE)

CWE-119 — Improper Restriction of Operations within the Bounds of a Memory Buffer

References

www.securitytracker.com/id/1038318 (vdb-entry)
www.securityfocus.com/bid/97922 (VDB Entry, Third Party Advisory, vdb-entry)
tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170419… (Vendor Advisory)

Frequently asked questions

What is CVE-2017-3808?: CVE-2017-3808 is a high-severity vulnerability in Cisco Unified Communications Manager, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.5/10. Published 2017-04-20.
How severe is CVE-2017-3808?: High severity. CVSS v3 base score is 7.5 out of 10.