Black Arrow Cyber Advisory 04 December 2023 – Apple, Google, ownCloud, Zoom and Zyxel Vulnerabilities Summary

Executive summary

Apple, Google, ownCloud and Zoom have all addressed vulnerabilities in their products which could be exploited by an attacker. The vulnerabilities could lead to remote code execution. The vulnerabilities impacting Google and ownCloud are actively being exploited by malicious actors.

Apple

Two new Zero-Days impacting Apples WebKit Browser were fixed in emergency updates. The two vulnerabilities allow attackers to gain access to sensitive information via an out-of-bounds read weakness and gain arbitrary code execution via maliciously crafted webpages.

Google Chrome

Google has addressed several vulnerabilities, including one actively exploited zero-day. The actively exploited zero-day is caused by a weakness within the Skia open-source 2D graphics library and can lead to remote execution. The vulnerability has been recorded as actively exploited.

ownCloud

Three vulnerabilities in the open-source file sharing software, ownCloud could disclose sensitive information and allow an attacker to modify files, if exploited. As a fix, ownCloud is recommending to delete the "owncloud/apps/graphapi/vendor/microsoft/microsoft-graph/tests/GetPhpInfo.php" file and disable the 'phpinfo' function. It is also advising users to change secrets like the ownCloud admin password, mail server and database credentials, and Object-Store/S3 access keys. One of the vulnerabilities has already been recorded as being actively exploited by malicious actors

Zoom

A vulnerability in Zoom could allow threat actors to take over meetings and steal data has been patched. Research has stated that the flaw was first discovered in June 2023. There are no reports of active exploitation in the wild at this time.

Zyxel

Zyxel have documented multiple security flaws in a range of products, including firewalls, access points and network attached storage (NAS) Devices, warning that unpatched devices are at risk of authentication bypass, command injection and denial-of-service attacks.

What’s the risk to me or my business?

There is a risk that that running unpatched versions of the above products will leave users at open to having the confidentiality, integrity and availability of their information compromised.

What can I do?

Black Arrow recommends organisations check whether they are running vulnerable versions of the above products, and if so, these should be updated to patched versions. Further information can be found below.

Further information about the Apple vulnerabilities can be found here:

https://www.bleepingcomputer.com/news/apple/apple-fixes-two-new-ios-zero-days-in-emergency-updates/

https://support.apple.com/en-gb/HT214031

https://support.apple.com/en-gb/HT214033

further information about the Google vulnerabilities can be found here:

https://thehackernews.com/2023/11/zero-day-alert-google-chrome-under.html

https://chromereleases.googleblog.com/2023/11/stable-channel-update-for-desktop_28.html

Further information about the ownCloud vulnerabilities can be found here:

https://thehackernews.com/2023/11/warning-3-critical-vulnerabilities.html

https://owncloud.com/security-advisories/subdomain-validation-bypass/

https://owncloud.com/security-advisories/webdav-api-authentication-bypass-using-pre-signed-urls/

https://owncloud.com/security-advisories/disclosure-of-sensitive-credentials-and-configuration-in-containerized-deployments/