CVE-2023-20018 — A vulnerability in the web-based management interface of Cisco IP Phone 7800 and

A vulnerability in the web-based management interface of Cisco IP Phone 7800 and 8800 Series Phones could allow an unauthenticated, remote attacker to bypass authentication on an affected device. This vulnerability is due to insufficient validation of user-supplied input. An atta

01What is this vulnerability?

A vulnerability in the web-based management interface of Cisco IP Phone 7800 and 8800 Series Phones could allow an unauthenticated, remote attacker to bypass authentication on an affected device. This vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by sending a crafted request to the web-based management interface. A successful…

02Affected products

Vendor	Product	Versions
Cisco	Cisco Session Initiation Protocol (SIP) Software	9.3(4) 3rd Party, 9.3(4)SR3 3rd Party, 9.3(4)SR1 3rd Party, 9.3(4)SR2 3rd Party, 11.0(3)SR3, 11.0(2)SR1, 11.5(1), 11.0(5)SR2, 11.0(2), 11.7(1), 11.0(4)SR3, 11.0(0.7) MPP, 11.0(4)SR2, 11.0(3)SR5, 11.0(3)SR6, 11.0(3), 11.0(4)SR1, 11.0(1) MPP, 11.0(4), 11.0(3)SR4, 11.0(5), 11.0(3)SR1, 11.0(5)SR1, 11.0(3)SR2, 11.0(2)SR2, 11.0(1), 11.5(1)SR1, 11-0-1MSR1-1, 10.4(1) 3rd Party, 10.3(1.11) 3rd Party, 10.2(2), 10.2(1)SR1, 10.1(1.9), 10.1(1)SR2, 10.2(1), 10.1(1)SR1, 10.4(1)SR2 3rd Party, 10.3(1), 10.3(1)SR4b, 10.3(1)SR5, 10.3(1.9) 3rd Party, 10.3(2), 10.3(1)SR4, 10.3(1)SR2, 10.3(1)SR3, 10.3(1)SR1, 12.6(1), 12.1(1), 12.5(1)SR1, 12.5(1)SR2, 12.5(1), 12.5(1)SR3, 12.6(1)SR1, 12.7(1), 12.1(1)SR1, 12.0(1), 12.0(1)SR2, 12.0(1)SR1, 12.0(1)SR3, 12.8(1), 12.8(1)SR1, 12.8(1)SR2, 11.0(5)SR3, 11.0(6), 11.0(6)SR1, 11.0(6)SR2, 10.3(1)SR6, 10.3(1)SR7, 12.7(1)SR1, 14.0(1)SR1, 14.0(1), 14.0(1)SR2, 14.0(1)SR3, 14.1(1), 14.1(1)SR1

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2023-01-19T01:35:41.006Z
• Last modified: 2024-08-02T08:57:35.086Z

09References

• sec.cloudapps.cisco.com — https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/ci…