ACL Bypass in Cisco IOS XR Software
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2023-20190 |
| CWE-ID | CWE-264 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
Cisco IOS XR Operating systems & Components / Operating system |
| Vendor | Cisco Systems, Inc |
Security Bulletin
This security bulletin contains one medium risk vulnerability.
1) Permissions, Privileges, and Access Controls
EUVDB-ID: #VU80769
Risk: Medium
CVSSv3.1: 5.1 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2023-20190
CWE-ID:
CWE-264 - Permissions, Privileges, and Access Controls
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to compromise the target system.
The vulnerability exists due to incorrect destination address range encoding in the compression module in the classic access control list (ACL) compression feature. A remote attacker can bypass configured ACL protections and access trusted networks that the device might be protecting.
MitigationInstall updates from vendor's website.
Vulnerable software versionsCisco IOS XR: 7.2.0 - 7.9
External linkshttp://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-comp3acl-vGmp6BQ3
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.
