Denial of service in Cisco StarOS

1) Input validation error

EUVDB-ID: #VU34084

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-3324

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input in the IPv6 implementation. A remote attacker can send a specially crafted IPv6 packet and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Cisco StarOS: - - 21.17

CPE2.3

• cpe:2.3:o:cisco_systems:cisco_staros:*:*:*:*:*:*:*:*
• cpe:2.3:o:cisco_systems:cisco_staros:21.15:*:*:*:*:*:*:*
• cpe:2.3:o:cisco_systems:cisco_staros:21.16.c:*:*:*:*:*:*:*

External links

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asr-dos-zJLJFgBf

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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