#VU67388 Uncontrolled Memory Allocation in Cisco Network Convergence System 4000 and Cisco IOS XR - CVE-2022-20845

Vulnerability identifier: #VU67388

Vulnerability risk: Low

CVSSv4.0: 4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2022-20845

CWE-ID: CWE-789

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Cisco Network Convergence System 4000
Hardware solutions / Other hardware appliances
Cisco IOS XR
Operating systems & Components / Operating system

Vendor: Cisco Systems, Inc

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to TL1 function does not free memory under some conditions. A local administrator can cause the TL1 process to consume large amounts of memory and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Cisco Network Convergence System 4000: All versions

Cisco IOS XR: before 6.5.32, 6.5.32

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External links
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ncs4k-tl1-GNnLwC6

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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