Vulnerability Monitor

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CVE-2018-0476

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.

Published

2018-10-05T14:29:05.357

Last Modified

2024-11-21T03:38:18.833

Status

Modified

Source

[email protected]

Severity

CVSSv3.0: 5.9 (MEDIUM)

CVSSv2 Vector

AV:N/AC:M/Au:N/C:N/I:N/A:C

Access Vector: NETWORK
Access Complexity: MEDIUM
Authentication: NONE
Confidentiality Impact: NONE
Integrity Impact: NONE
Availability Impact: COMPLETE

Exploitability Score

8.6

Impact Score

6.9

Weaknesses

Type: Secondary
CWE-399
Type: Primary
NVD-CWE-noinfo

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Operating System	cisco	ios_xe	15.5\(3\)s5.1	Yes
Operating System	cisco	ios_xe	15.5\(3\)s6.1	Yes
Operating System	cisco	ios_xe	16.6.2	Yes

References

http://www.securityfocus.com/bid/105419 Third Party Advisory, VDB Entry ([email protected])
http://www.securitytracker.com/id/1041734 Third Party Advisory, VDB Entry ([email protected])
http://www.securitytracker.com/id/1041737 Third Party Advisory, VDB Entry ([email protected])
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180926-sip-alg Vendor Advisory ([email protected])
http://www.securityfocus.com/bid/105419 Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
http://www.securitytracker.com/id/1041734 Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
http://www.securitytracker.com/id/1041737 Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180926-sip-alg Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)