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May 30, 2023
Severity High Analysis Summary Recently, researchers discovered an advanced phishing method called “file archiver in the browser” that exploits .ZIP domains to deceive unsuspecting individuals. This […]May 28, 2023Severity High Analysis Summary An email protection and network security services provider has issued a warning regarding a zero-day vulnerability that has been exploited to compromise […]May 26, 2023Severity High Analysis Summary CVE-2023-32165 CVSS:9.8 D-Link D-View could allow a remote attacker to execute arbitrary code on the system, caused by a flaw in TftpReceiveFileHandler […]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.
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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
May 30, 2023Severity High Analysis Summary Recently, researchers discovered an advanced phishing method called “file archiver in the browser” that exploits .ZIP domains to deceive unsuspecting individuals. This […]May 28, 2023Severity High Analysis Summary An email protection and network security services provider has issued a warning regarding a zero-day vulnerability that has been exploited to compromise […]May 26, 2023Severity High Analysis Summary CVE-2023-32165 CVSS:9.8 D-Link D-View could allow a remote attacker to execute arbitrary code on the system, caused by a flaw in TftpReceiveFileHandler […]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 Advisory – CVE-2018-2815 – Multiple F5 Java products, DoS vulnerability
December 20, 2018Rewterz Threat Advisory – Ryuk evolves as a new Targeted Ransomware
December 20, 2018
SEVERITY: Medium
CATEGORY: Vulnerability
ANALYSIS SUMMARY
A use-after-free issue was found in the way Linux kernel’s KVM hypervisor processed posted interrupts, when nested(=1) virtualization is enabled. Innested_get_vmcs12_pages(). In case of an error while processing posted interrupt address, it unmaps the ‘pi_desc_page’ without resetting ‘pi_desc’ descriptor address. Which is later used in pi_test_and_clear_on().
A guest user/process could use this flaw to crash the host kernel resulting in DoS.
IMPACT
System access or Dos (Denial of Service) in guest virtual machine.
AFFECTED PRODUCTS
- Linux Kernel 3.16.62
- Linux Kernel 4.4.168
- Linux Kernel 4.9.146
- Linux Kernel 4.14.89
- Linux Kernel 4.19.10
REMEDIATION
Upstream patch can be followed from the following link.
(Note: This is a third-party patch, whereas the vendor has not released any patches for this vulnerability so far.)
https://marc.info/?l=kvm&m=154514994222809&w=2
If you thin you’re a victim of a cyber-attack, immediately send an email to soc@rewterz.com for a quick response.