Detections
Analytics
Cisco Unity Connection Remote Code Execution Vulnerability (regreSSHion) (cisco-sa-openssh-rce-2024)
high Nessus Plugin ID 314171
Synopsis
The remote device is missing a vendor-supplied security patch.Description
According to its self-reported version, Cisco Unity Connection is affected by a vulnerability.- A remote code execution vulnerability exists in Cisco Unity Connection due to a signal handler race condition found in sshd, where a client does not authenticate within LoginGraceTime seconds, after which the sshd SIGALRM handler is called asynchronously. An unauthenticated, remote attacker can exploit this to call various functions that are not async-signal-safe with root privileges. (CVE-2024-6387)
Please see the included Cisco BIDs and Cisco Security Advisory for more information.
Solution
Upgrade to the relevant fixed version referenced in Cisco bug ID CSCwk63494.See Also
Plugin Details
Severity: High
ID: 314171
File Name: cisco-sa-openssh-rce-2024-uc.nasl
Version: 1.1
Type: Local
Family: CISCO
Published: 5/11/2026
Updated: 5/11/2026
Supported Sensors: Nessus
Risk Information
VPR
Risk Factor: Critical
Score: 9.0
CVSS v2
Risk Factor: High
Base Score: 7.6
Vector: CVSS2#AV:N/AC:H/Au:N/C:C/I:C/A:C
CVSS Score Source: CVE-2024-6387
CVSS v3
Risk Factor: High
Base Score: 8.1
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Vulnerability Information
CPE: cpe:/a:cisco:unity_connection
Required KB Items: installed_sw/Cisco VOSS Unity
Patch Publication Date: 7/1/2024
Vulnerability Publication Date: 7/1/2024
Reference Information
CVE: CVE-2024-6387