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Zoom Patches Severe macOS App Vulnerabilities Disclosed at DEF CON

By Eduard Kovacs on August 16, 2022

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Zoom knowledgeable prospects final week that macOS updates for the Zoom software patch two high-severity vulnerabilities. Particulars of the failings have been disclosed on Friday on the DEF CON convention in Las Vegas by macOS safety researcher Patrick Wardle.

Wardle, who’s the founding father of the Goal-See Basis, a non-profit that gives free and open supply macOS safety assets, confirmed at DEF CON how an area, unprivileged attacker might exploit vulnerabilities in Zoom’s replace course of to escalate privileges to root.

The researcher confirmed in his presentation that the macOS consumer just isn’t prompted for his or her admin password when Zoom is up to date, together with when it’s routinely up to date — the auto-update characteristic is enabled by default. He additionally confirmed how a malicious actor might hijack the replace mechanism to downgrade Zoom to an older model that may include identified vulnerabilities.

Many researchers have discovered vital vulnerabilities in Zoom because the pandemic led to a large adoption of the video conferencing platform. Google researchers, as an illustration, lately detailed a zero-click distant code execution exploit.

The assault described at DEF CON by Wardle concerned an area attacker abusing the auto-update course of, which may be initiated on demand, and leveraging a cryptographic flaw associated to insecure replace package deal signature validation — replace packages can solely be put in if they’re signed by Zoom.

Zoom patched some associated vulnerabilities up to now months, however Wardle mentioned throughout his speak that his assault had nonetheless labored. In the future after the presentation, nonetheless, Zoom introduced the discharge of Zoom Consumer for Conferences for macOS 5.11.5 to patch the auto-update course of vulnerability (CVE-2022-28756). Model 5.11.3, which ought to patch the packet signature validation problem (CVE-2022-28751), was introduced on August 9, a number of days earlier than the DEF CON presentation.

The corporate identified that each the usual and IT admin variations of the appliance are affected.

Zoom has additionally knowledgeable prospects about 5 different vital and high-severity vulnerabilities, together with ones that would result in distant code execution, privilege escalation, and the hijacking and disruption of conferences. Most of those flaws have been found by Zoom’s personal safety staff.

Additionally final week, on the Black Hat convention in Las Vegas, Wardle revealed that some industrial cybersecurity merchandise had stolen algorithms from one of many free instruments supplied by his Goal-See Basis.

Associated: Zoom Patches Two Severe Vulnerabilities Discovered by Cisco Researchers

Associated: Venture Zero: Zoom Platform Missed ASLR Exploit Mitigation

Associated: Particulars Disclosed for Zoom Exploit That Earned Researchers $200,000

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