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Critical Flaw in Jabber for Windows Could Lead to Code Execution

Cisco this week announced the release of software updates that address several vulnerabilities in Jabber for desktop and mobile platforms, the most severe of which could be abused to execute arbitrary code with elevated privileges.

Cisco this week announced the release of software updates that address several vulnerabilities in Jabber for desktop and mobile platforms, the most severe of which could be abused to execute arbitrary code with elevated privileges.

The bugs impact Cisco Jabber for Windows, macOS, and mobile platforms, and are not dependable to one another. To successfully exploit them, an attacker would need to be authenticated to an Extensible Messaging and Presence Protocol (XMPP) server in use by the affected software and to be able to send XMPP messages.

The most important of them is CVE-2021-1411, a critical arbitrary program execution flaw in Jabber for Windows, which exists because of improper validation of message content. Successful exploitation of this vulnerability could result in code execution, Cisco explains.

Next in line is CVE-2021-1469, a high-severity security hole in Jabber for Windows that, similarly to CVE-2021-1411, could lead to code execution. The third issue is CVE-2021-1417, a medium-severity vulnerability leading to information disclosure.

Two other medium-severity flaws affect Jabber for Windows, Jabber for macOS, and Jabber for mobile platforms. The first of them (CVE-2021-1471) could allow an attacker to inspect or tamper with connections between the Jabber client and a server, while the second (CVE-2021-1418) could be exploited for denial of service.

Cisco has released software updates to address these vulnerabilities and notes that there are no workarounds for them. The company also notes that it is not aware of these bugs being exploited in attacks.

This week, the tech giant also released advisories for more than 40 high- and medium-severity vulnerabilities across its product portfolio.

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These include patches for a series of vulnerabilities in IOS XE SD-WAN software (DoS, arbitrary command execution, and buffer overflow), flaws in various IOS XE components (leading to OS command injection, DoS, privilege escalation, and arbitrary code execution), and bugs in Access Points Software (code execution, DoS, and information disclosure).

Cisco also announced that it is investigating the impact of the two high-severity vulnerabilities that the OpenSSL Project patched on Thursday, and which could result in attackers signing certificates, or causing a DoS condition.

This week, Cisco also patched medium-severity vulnerabilities in IOS XE SD-WAN software, IOS application environment, Network Convergence System (NCS) 520 routers, Aironet access points, and IOS XE wireless controller software. The flaws could be exploited for command injection, denial of service, privilege escalation, file overwrite, and other types of attacks.

Information on all of these vulnerabilities is available on Cisco’s security portal.

Related: Cisco Patches Severe Flaws in Network Management Products, Switches

Related: Over 70 Vulnerabilities Will Remain Unpatched in EOL Cisco Routers

Related: Cisco Patches Critical Vulnerabilities in Small Business Routers, SD-WAN

Written By

Ionut Arghire is an international correspondent for SecurityWeek.

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