CVE-2023-20190: ACL Compression Bypass in Cisco IOS XR
CVE-2023-20190 Published on September 13, 2023
A vulnerability in the classic access control list (ACL) compression feature of Cisco IOS XR Software could allow an unauthenticated, remote attacker to bypass the protection that is offered by a configured ACL on an affected device. This vulnerability is due to incorrect destination address range encoding in the compression module of an ACL that is applied to an interface of an affected device. An attacker could exploit this vulnerability by sending traffic through the affected device that should be denied by the configured ACL. A successful exploit could allow the attacker to bypass configured ACL protections on the affected device, allowing the attacker to access trusted networks that the device might be protecting. There are workarounds that address this vulnerability. This advisory is part of the September 2023 release of the Cisco IOS XR Software Security Advisory Bundled Publication. For a complete list of the advisories and links to them, see Cisco Event Response: September 2023 Semiannual Cisco IOS XR Software Security Advisory Bundled Publication .
Vulnerability Analysis
CVE-2023-20190 is exploitable with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality, with no impact on integrity, and no impact on availability.
Weakness Type
Permissions, Privileges, and Access Controls
Weaknesses in this category are related to the management of permissions, privileges, and other security features that are used to perform access control.
Products Associated with CVE-2023-20190
You can be notified by email with stack.watch whenever vulnerabilities like CVE-2023-20190 are published in Cisco Ios Xr:
Affected Versions
Cisco IOS XR Software:- Version 5.2.0 is affected.
- Version 5.2.1 is affected.
- Version 5.2.2 is affected.
- Version 5.2.4 is affected.
- Version 5.2.3 is affected.
- Version 5.2.5 is affected.
- Version 5.2.47 is affected.
- Version 5.3.0 is affected.
- Version 5.3.1 is affected.
- Version 5.3.2 is affected.
- Version 5.3.3 is affected.
- Version 5.3.4 is affected.
- Version 6.0.0 is affected.
- Version 6.0.1 is affected.
- Version 6.0.2 is affected.
- Version 6.1.1 is affected.
- Version 6.1.2 is affected.
- Version 6.1.3 is affected.
- Version 6.1.4 is affected.
- Version 6.1.12 is affected.
- Version 6.1.22 is affected.
- Version 6.1.32 is affected.
- Version 6.1.36 is affected.
- Version 6.1.42 is affected.
- Version 6.2.1 is affected.
- Version 6.2.2 is affected.
- Version 6.2.3 is affected.
- Version 6.2.25 is affected.
- Version 6.2.11 is affected.
- Version 6.3.2 is affected.
- Version 6.3.3 is affected.
- Version 6.3.15 is affected.
- Version 6.4.1 is affected.
- Version 6.4.2 is affected.
- Version 6.4.3 is affected.
- Version 6.5.1 is affected.
- Version 6.5.2 is affected.
- Version 6.5.3 is affected.
- Version 6.5.25 is affected.
- Version 6.5.26 is affected.
- Version 6.5.28 is affected.
- Version 6.5.29 is affected.
- Version 6.5.32 is affected.
- Version 6.5.33 is affected.
- Version 6.6.2 is affected.
- Version 6.6.3 is affected.
- Version 6.6.25 is affected.
- Version 6.6.4 is affected.
- Version 7.0.1 is affected.
- Version 7.0.2 is affected.
- Version 7.0.12 is affected.
- Version 7.0.14 is affected.
- Version 7.1.1 is affected.
- Version 7.1.15 is affected.
- Version 7.1.2 is affected.
- Version 7.1.3 is affected.
- Version 6.7.1 is affected.
- Version 6.7.2 is affected.
- Version 6.7.3 is affected.
- Version 6.7.4 is affected.
- Version 7.2.0 is affected.
- Version 7.2.1 is affected.
- Version 7.2.2 is affected.
- Version 7.3.1 is affected.
- Version 7.3.15 is affected.
- Version 7.3.2 is affected.
- Version 7.3.3 is affected.
- Version 7.4.1 is affected.
- Version 7.4.2 is affected.
- Version 6.8.1 is affected.
- Version 6.8.2 is affected.
- Version 7.5.1 is affected.
- Version 7.5.3 is affected.
- Version 7.5.2 is affected.
- Version 7.6.1 is affected.
- Version 7.6.2 is affected.
- Version 7.7.1 is affected.
- Version 7.7.2 is affected.
- Version 6.9.1 is affected.
- Version 6.9.2 is affected.
- Version 7.8.1 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.