Cisco NX-OS Firmware update for OpenSSL

1) Resource exhaustion

EUVDB-ID: #VU88211

Risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2024-2511

CWE-ID: CWE-400 - Resource exhaustion

Exploit availability: No

Description

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

The vulnerability exists due to unbounded memory growth when processing TLSv1.3 sessions. A remote attacker can trigger resource exhaustion and perform a denial of service (DoS) attack.

Successful exploitation of the vulnerability requires that the non-default SSL_OP_NO_TICKET option is being used in TLSv1.3.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Cisco NX-OS: 9.2(1a) - 9.4(1a)

CPE2.3

• cpe:2.3:o:cisco_systems:cisco_nx-os:9.2(1a):*:*:*:*:*:*:*
• cpe:2.3:o:cisco_systems:cisco_nx-os:9.2(2v):*:*:*:*:*:*:*
• cpe:2.3:o:cisco_systems:cisco_nx-os:9.2(2t):*:*:*:*:*:*:*

External links

https://www.ibm.com/support/pages/node/7176547

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.