Category Archives: Advisories

USN-5331-1: tcpdump vulnerabilities

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It was discovered that tcpdump incorrectly handled certain inputs.
An attacker could possibly use this issue to cause a denial of service,
or possibly execute arbitrary code. (CVE-2018-16301)

It was discovered that tcpdump incorrectly handled certain captured data.
An attacker could possibly use this issue to cause a denial of service.
(CVE-2020-8037)

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Post Title

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Multiple vulnerabilities have been discovered in Google Chrome, the most severe of which could allow for arbitrary code execution. Google Chrome is a web browser used to access the Internet. Successful exploitation of the most severe of these vulnerabilities could allow an attacker to execute arbitrary code in the context of the browser. Depending on the privileges associated with the application, an attacker could view, change, or delete data. If this application has been configured to have fewer user rights on the system, exploitation of the most severe of these vulnerabilities could have less impact than if it was configured with administrative rights.

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CVE-2020-36519

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Mimecast Email Security before 2020-01-10 allows any admin to spoof any domain, and pass DMARC alignment via SPF. This occurs through misuse of the address rewrite feature. (The domain being spoofed must be a customer in the Mimecast grid from which the spoofing occurs.)

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Additional Wiper Malware Deployed in Ukraine #CaddyWiper

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FortiGuard Labs is aware of new wiper malware observed in the wild attacking Ukrainian interests. The wiper was found by security researchers today at ESET. The wiper is dubbed CaddyWiper. Preliminary analysis reveals that the wiper malware erases user data and partition information from attached drives. According to the tweet, CaddyWiper does not share any code with HermeticWiper or IsaacWiper or any known malware families.This is a breaking news event. More information will be added when relevant updates are available.For further reference about Ukrainian wiper attacks please reference our Threat Signal from January and February. Also, please refer to our recent blog that encompasses the recent escalation in Ukraine, along with salient advice about patch management and why it is important, especially in today’s political climate.Is this the Work of Nobelium/APT29?At this time, there is not enough information to correlate this to Nobelium/APT29 or nation state activity. Was this Sample Signed?No. Unlike the HermeticWiper sample related to Ukrainian attacks, this sample is unsigned.Why is Malware Signed?Malware is often signed by threat actors as a pretense to evade AV or any other security software. Signed malware allows threat actors to evade and effectively bypass detection, guaranteeing a higher success rate. What is the Status of Coverage?FortiGuard Labs has AV coverage in place for publicly available samples as:W32/CaddyWiper.NCX!tr

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USN-5328-2: OpenSSL vulnerability

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USN-5328-1 fixed a vulnerability in OpenSSL. This update provides
the corresponding update for Ubuntu 14.04 ESM and Ubuntu 16.04 ESM.

Original advisory details:

Tavis Ormandy discovered that OpenSSL incorrectly parsed certain
certificates. A remote attacker could possibly use this issue to cause
OpenSSH to stop responding, resulting in a denial of service.

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