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May 11, 2022
CVE-2022-26923 - Active Directory Domain Services Elevation of Privilege Vulnerability
THE THREAT Microsoft has disclosed a new vulnerability impacting Active Directory Certificate Services (ADCS) tracked as CVE-2022-26923 (Active Directory Domain Services Elevation of Privilege Vulnerability). If exploited successfully, an authenticated attacker can escalate privileges in environments where ADCS is running on the domain. eSentire is aware of technical details and tooling [2] for…
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Waterloo, ON, May 17, 2022 — eSentire, the Authority in Managed Detection and Response (MDR), maintains one of the most secure and robust IT environments of any MDR provider in the industry. To that end, eSentire today announced that it has received the Payment Card Industry Data Security Standard (PCI DSS) certification, considered one of the most stringent and comprehensive payment card…
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Security advisories — Feb 26, 2019

Ghostscript Vulnerability

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A vulnerability affecting the Ghostscript suite of software has been discovered and publicly released [1]. Ghostscript is an open source software based on Adobe Systems' PostScript and is widely used across the Windows, Linux and Apple machines. If exploited the vulnerability could allow a remote, unauthenticated threat actor to run commands, create files and delete or extract data. The exploitation of this vulnerability has not been seen in the wild at this time, but proof of concept code has been released [2]. It is likely that more widespread exploitation attempts will be seen in the near future.

What we’re doing about it

What you should do about it

Additional information

This attack is possible due to the implementation of the –dSAFER sandbox. The sandbox is meant to validate content but can be circumvented to allow malicious content through. The attack is carried out by sending a malformed file (PDF, PostScript, XPF or EPS); when the file reaches the Ghostcript interpreter it automatically executes and infects the host machine.

A potential short term fix for this vulnerability is to disable PS, EPS, PDF, and XPS coders. This is not recommended due to the high potential for business disruption. Due to the wide range of programs that rely on Ghostscript, this vulnerability should be taken seriously and patches should be applied as soon as vendors make them available.

Known Affected Systems:

Potentially Affected Systems:


References:

[1] https://kb.cert.org/vuls/id/332928

[2] http://openwall.com/lists/oss-security/2018/08/21/2

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