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Nov 22, 2021
Microsoft Exchange Vulnerability - CVE-2021-42321
THE THREAT eSentire has identified publicly available Proof-of-Concept (PoC) exploit code, for the critical Microsoft Exchange vulnerability CVE-2021-42321. CVE-2021-42321 was announced as part of Microsoft’s November Patch Tuesday release. Exploitation would allow a remote threat actor, with previous authentication, to execute code on vulnerable servers. Prior to the patch release, Microsoft…
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Telarus and eSentire Expand Partnership to Safeguard Enterprises Globally Against Business Disrupting Ransomware and Zero-Day Attacks
London, UK and Sydney, Australia– Oct. 28, 2021 - eSentire, recognized globally as the Authority in Managed Detection and Response (MDR), today announces the expansion of its partnership with Telarus, the largest privately-held distributor of business cloud infrastructure and contact centre services. Building on their mutual success across North America, Telarus will bring eSentire’s Managed…
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Security advisories — Sep 03, 2020

Cisco Jabber Vulnerabilities

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THE THREAT

On September 2nd, 2020, Cisco announced a series of high impact vulnerabilities affecting the Cisco Jabber video conferencing platform [1]. The most serious vulnerability is CVE-2020-3495, which allows for arbitrary code execution. To exploit CVE-2020-3495 an attacker would need sufficient access to send messages to Jabber clients. This vulnerability is considered wormable, meaning that an exploit could be created to automatically spread malicious content to other vulnerable systems.

Organizations are encouraged to apply security patches after performing a business impact review.

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What you should do about it

Additional information

The vulnerability stems from improper validation of message contents. In an attack scenario, a threat actor who has already achieved initial access could send a maliciously crafted Extensible Messaging and Presence Protocol (XMPP) message to internal Jabber users. After receiving the message, no user interaction is required.

CVE-2020-3495 affects versions 12.1 – 12.9 of the Jabber client for Windows. Exploitation of the vulnerability has not been identified in the wild at this time.

Additional Cisco Jabber Vulnerabilities:

References:

[1] https://watchcom.no/nyheter/nyhetsarkiv/uncovers-cisco-jabber-vulnerabilities/

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