CVE-2021-1592

Published on: 08/25/2021 12:00:00 AM UTC

Last Modified on: 09/03/2021 01:50:00 PM UTC

CVE-2021-1592 - advisory for cisco-sa-ucs-ssh-dos-MgvmyrQy

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

Certain versions of Unified Computing System from Cisco contain the following vulnerability:

A vulnerability in the way Cisco UCS Manager software handles SSH sessions could allow an authenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper resource management for established SSH sessions. An attacker could exploit this vulnerability by opening a significant number of SSH sessions on an affected device. A successful exploit could allow the attacker to cause a crash and restart of internal Cisco UCS Manager software processes and a temporary loss of access to the Cisco UCS Manager CLI and web UI. Note: The attacker must have valid user credentials to authenticate to the affected device.

CVE-2021-1592 has been assigned by [email protected] to track the vulnerability - currently rated as MEDIUM severity.
The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory.
Affected Vendor/Software: Cisco - Cisco Unified Computing System (Managed) version n/a

CVSS3 Score: 4.3 - MEDIUM

Attack Vector ^ⓘ	Attack Complexity	Privileges Required	User Interaction
NETWORK	LOW	LOW	NONE
Scope	Confidentiality Impact	Integrity Impact	Availability Impact
UNCHANGED	NONE	NONE	LOW

CVSS2 Score: 4 - MEDIUM

Access Vector^ⓘ	Access Complexity	Authentication
NETWORK	LOW	SINGLE
Confidentiality Impact	Integrity Impact	Availability Impact
NONE	NONE	PARTIAL

CVE References

Description	Tags ^ⓘ	Link
Cisco UCS Manager Software SSH Sessions Denial of Service Vulnerability	tools.cisco.com text/html	CISCO 20210825 Cisco UCS Manager Software SSH Sessions Denial of Service Vulnerability

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Related QID Numbers

317025 Cisco UCS Manager Software SSH Sessions Denial of Service Vulnerability (cisco-sa-ucs-ssh-dos-MgvmyrQy)

Exploit/POC from Github

PoC for exploiting CVE-2021-1592 : A vulnerability in the way Cisco UCS Manager software handles SSH sessions could a…

Known Affected Configurations (CPE V2.3)

Type	Vendor	Product	Version	Update	Edition	Language
Application	Cisco	Unified Computing System	All	All	All	All
Hardware	Cisco	Unified Computing System 64108	-	All	All	All
Hardware	Cisco	Unified Computing System 6454	-	All	All	All

cpe:2.3:a:cisco:unified_computing_system:*:*:*:*:*:*:*:*:
cpe:2.3:h:cisco:unified_computing_system_64108:-:*:*:*:*:*:*:*:
cpe:2.3:h:cisco:unified_computing_system_6454:-:*:*:*:*:*:*:*:

No vendor comments have been submitted for this CVE

Social Mentions

Source	Title	Posted (UTC)
@CVEreport	CVE-2021-1592 : A vulnerability in the way Cisco UCS Manager software handles SSH sessions could allow an authent… twitter.com/i/web/status/1…	2021-08-25 19:28:20