Cisco Unified IP Conference Station 7937G up to 1.4.5.7 SSH Administrative Console privileges management ⚔ [Disputed]

Summaryinfo

A vulnerability categorized as critical has been discovered in Cisco Unified IP Conference Station 7937G up to 1.4.5.7. The affected element is an unknown function of the component SSH Administrative Console. Executing a manipulation can lead to privileges management. This vulnerability appears as CVE-2020-16137. The attack may be performed from remote. In addition, an exploit is available. The actual existence of this vulnerability is currently in question.

Detailsinfo

A vulnerability was found in Cisco Unified IP Conference Station 7937G up to 1.4.5.7. It has been declared as critical. This vulnerability affects an unknown functionality of the component SSH Administrative Console. The manipulation with an unknown input leads to a privileges management vulnerability. The CWE definition for the vulnerability is CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

** UNSUPPORTED WHEN ASSIGNED ** A privilege escalation issue in Cisco Unified IP Conference Station 7937G 1-4-4-0 through 1-4-5-7 allows attackers to reset the credentials for the SSH administrative console to arbitrary values. Note: We cannot prove this vulnerability exists. Out of an abundance of caution, this CVE is being assigned to better serve our customers and ensure all who are still running this product understand that the product is end of life and should be removed or upgraded. For more information on this, and how to upgrade, refer to the CVE’s reference information.

The weakness was presented 08/12/2020 by Cody Martin (debifrank) with Black Lantern Security (Website). The advisory is shared for download at blacklanternsecurity.com. This vulnerability was named CVE-2020-16137 since 07/29/2020. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details are unknown but a public exploit is available. The MITRE ATT&CK project declares the attack technique as T1068.

A public exploit has been developed by Cody Martin (debifrank) and been published even before and not after the advisory. It is possible to download the exploit at github.com. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 2 days. During that time the estimated underground price was around $5k-$25k. The real existence of this vulnerability is still doubted at the moment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

See VDB-159749 and VDB-159750 for similar entries. Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

• Cisco

Name

• Unified IP Conference Station 7937G

Version

• 1.4.5.0
• 1.4.5.1
• 1.4.5.2
• 1.4.5.3
• 1.4.5.4
• 1.4.5.5
• 1.4.5.6
• 1.4.5.7

License

• commercial

Support

• end of life

Website

• Vendor: https://www.cisco.com/

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Once again VulDB remains the best source for vulnerability data.

Discussion