Vulnerability Description
A vulnerability in the Network Address Translation (NAT) Session Initiation Protocol (SIP) Application Layer Gateway (ALG) of Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause an affected device to reload. The vulnerability is due to improper processing of SIP packets in transit while NAT is performed on an affected device. An unauthenticated, remote attacker could exploit this vulnerability by sending crafted SIP packets via UDP port 5060 through an affected device that is performing NAT for SIP packets. A successful exploit could allow an attacker to cause the device to reload, resulting in a denial of service (DoS) condition.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Cisco | Ios Xe | 15.5\(3\)s5.1 |
Related Weaknesses (CWE)
References
- http://www.securityfocus.com/bid/105419Third Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1041734Third Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1041737Third Party AdvisoryVDB Entry
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-2Vendor Advisory
- http://www.securityfocus.com/bid/105419Third Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1041734Third Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1041737Third Party AdvisoryVDB Entry
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-2Vendor Advisory
FAQ
What is CVE-2018-0476?
CVE-2018-0476 is a vulnerability with a CVSS score of 5.9 (MEDIUM). A vulnerability in the Network Address Translation (NAT) Session Initiation Protocol (SIP) Application Layer Gateway (ALG) of Cisco IOS XE Software could allow an unauthenticated, remote attacker to c...
How severe is CVE-2018-0476?
CVE-2018-0476 has been rated MEDIUM with a CVSS base score of 5.9/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2018-0476?
Check the references section above for vendor advisories and patch information. Affected products include: Cisco Ios Xe.