Detections
Analytics
Cisco IOS XR Software IPv6 Access Control List Bypass (cisco-sa-ipv6-acl-CHgdYk8j)
medium Nessus Plugin ID 146480
Language:
Synopsis
The remote device is missing a vendor-supplied security patchDescription
A vulnerability in the IPv6 traffic processing of Cisco IOS XR Software for certain Cisco devices could allow an unauthenticated, remote attacker to bypass an IPv6 access control list (ACL) that is configured for an interface of an affected device. The vulnerability is due to improper processing of IPv6 traffic that is sent through an affected device. An attacker could exploit this vulnerability by sending crafted IPv6 packets that traverse the affected device.A successful exploit could allow the attacker to access resources that would typically be protected by the interface ACL.
Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.
Solution
Upgrade to the relevant fixed version referenced in Cisco bug IDs CSCvm55638See Also
Plugin Details
Severity: Medium
ID: 146480
File Name: cisco-sa-ipv6-acl-CHgdYk8j-iosxr.nasl
Version: 1.6
Type: combined
Family: CISCO
Published: 2/12/2021
Updated: 4/8/2021
Supported Sensors: Nessus
Risk Information
VPR
Risk Factor: Low
Score: 2.5
CVSS v2
Risk Factor: Medium
Base Score: 6.4
Temporal Score: 4.7
Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:N
CVSS Score Source: CVE-2021-1389
CVSS v3
Risk Factor: Medium
Base Score: 6.5
Temporal Score: 5.7
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
Vulnerability Information
CPE: cpe:/o:cisco:ios_xr
Required KB Items: Host/Cisco/IOS-XR/Version
Exploit Ease: No known exploits are available
Patch Publication Date: 2/3/2021
Vulnerability Publication Date: 2/3/2021
Reference Information
CVE: CVE-2021-1389