Vulnerability identifier: #VU51724

Vulnerability risk: Low

CVSSv3.1: 3.8 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-1418

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Cisco Jabber for Windows
Client/Desktop applications / Messaging software
Cisco Jabber for MacOS
Client/Desktop applications / Messaging software
Cisco Jabber for Android and iOS
Client/Desktop applications / Messaging software

Vendor: Cisco Systems, Inc

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to improper validation of message content. A remote authenticated attacker can send specially crafted XMPP messages and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Cisco Jabber for Windows: 12.1 - 12.9

Cisco Jabber for MacOS: 12.7 - 12.9

Cisco Jabber for Android and iOS: 12.9

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External links
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cisco-jabber-PWrTATTC

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.