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March 17, 2023Severity High Analysis Summary Chaos is a customizable ransomware builder that emerged on June 9 2021 (in underground forums) by falsely marketing itself as the .NET […]March 17, 2023Severity High Analysis Summary CVE-2023-26361 CVSS:4.9 Adobe ColdFusion could allow a remote authenticated attacker to traverse directories on the system. An attacker could send a specially […]March 17, 2023Severity Medium Analysis Summary Ursnif banking trojan also known as Gozi and Dreambot has been around for more than 10 years. It gained popularity in 2015 […]Threat Insights
Before Rewterz got its start, the market was in dire need of a specialized and dedicated information security company. It was nearly impossible for businesses to find a trustworthy provider that could truly cover all of their bases. We wanted to meet this need, giving companies across the globe a chance to get ahead while knowing that their data is in good hands.
Connect with Us
Platform
Managed Security Services
Managed Penetration Testing
Rewterz penetration testing services help organizations determine if a cyber attacker can gain access to their critical assets while giving them detailed insights of the overall business impact of a cyber attack.
Resources
March 17, 2023Severity High Analysis Summary Chaos is a customizable ransomware builder that emerged on June 9 2021 (in underground forums) by falsely marketing itself as the .NET […]March 17, 2023Severity High Analysis Summary CVE-2023-26361 CVSS:4.9 Adobe ColdFusion could allow a remote authenticated attacker to traverse directories on the system. An attacker could send a specially […]March 17, 2023Severity Medium Analysis Summary Ursnif banking trojan also known as Gozi and Dreambot has been around for more than 10 years. It gained popularity in 2015 […]Threat Insights
Before Rewterz got its start, the market was in dire need of a specialized and dedicated information security company. It was nearly impossible for businesses to find a trustworthy provider that could truly cover all of their bases. We wanted to meet this need, giving companies across the globe a chance to get ahead while knowing that their data is in good hands.
Connect with Us
Rewterz Threat Alert – Active FBR Malicious Attachments Email Campaign
April 17, 2021Rewterz Threat Advisory – CVE-2021-30245 – Apache OpenOffice Code Execution
April 19, 2021
Severity
High
Analysis Summary
CVE-2021-3492
A double-free flaw in the copy_from_user() function allows an attacker to execute arbitrary code on the system in shiftfs (out-of-tree stacking file system). The attacker can exploit this vulnerability by sending specially crafted ioctls requests to cause kernel memory consumption (denial of service) in the system or execute arbitrary codes.
CVE-2021-3493
In the overlayfs stacking file system in the kernel, an authenticated attacker can gain elevated privileges on the system caused by the improper validation of filing capabilities against user namespaces. The attacker can exploit this vulnerability by sending specially crafted requests along with a patch carried in the Ubuntu kernel to gain elevated privileges.
Impact
- Denial of Service
- Gain Escalated privileges
- Gain access
Affected Vendors
Ubuntu
Affected Products
- Ubuntu Ubuntu 20.04 LTS
- Ubuntu Ubuntu 20.10
- Linux Kernel 5.10
- Linux Kernel 5.11
Remediation
Download the latest patches for Ubuntu and refer to the Ubuntu website for information on upgrades or suggested workarounds at