Vulnerability Monitor

The vendors, products, and vulnerabilities you care about

CVE-2023-20135

A vulnerability in Cisco IOS XR Software image verification checks could allow an authenticated, local attacker to execute arbitrary code on the underlying operating system. This vulnerability is due to a time-of-check, time-of-use (TOCTOU) race condition when an install query regarding an ISO image is performed during an install operation that uses an ISO image. An attacker could exploit this vulnerability by modifying an ISO image and then carrying out install requests in parallel. A successful exploit could allow the attacker to execute arbitrary code on an affected device.

Published

2023-09-13T17:15:09.253

Last Modified

2024-11-21T07:40:38.240

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 5.7 (MEDIUM)

Weaknesses

Type: Secondary
CWE-347
Type: Primary
CWE-367

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Operating System	cisco	ios_xr	< 7.6	Yes
Operating System	cisco	ios_xr	< 7.10.1	Yes

References

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-lnt-L9zOkBz5 Vendor Advisory ([email protected])
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-lnt-L9zOkBz5 Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)