#VU97721 Out-of-bounds write in Cisco SD-WAN vEdge Routers and Cisco SD-WAN vEdge Cloud Router - CVE-2024-20496

Vulnerability identifier: #VU97721

Vulnerability risk: Low

CVSSv4.0: 2.3 [CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2024-20496

CWE-ID: CWE-787

Exploitation vector: Local network

Exploit availability: No

Vulnerable software:
Cisco SD-WAN vEdge Routers
Hardware solutions / Routers & switches, VoIP, GSM, etc
Cisco SD-WAN vEdge Cloud Router
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vendor: Cisco Systems, Inc

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error when processing untrusted input in the UDP packet validation code. A remote attacker on the local network can trigger an out-of-bounds write and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Cisco SD-WAN vEdge Routers: 20.5 - 20.9

Cisco SD-WAN vEdge Cloud Router: 20.5 - 20.9

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External links
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdw-vedos-KqFfhps3

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.