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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
September 11, 2023
Severity High Analysis Summary The STOP/DJVU ransomware initially made headlines in 2018 and has since been attacking individuals all around the world. It’s widespread on torrent […]September 11, 2023
Severity High Analysis Summary Stealc is a new malware that was first marketed by an actor named Plymouth on the XSS and BHF Russian-speaking underground forums […]September 11, 2023
Severity High Analysis Summary CVE-2023-4807 OpenSSL is vulnerable to a denial of service, caused by a state corruption flaw in the POLY1305 MAC (message authentication code) […]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
September 11, 2023
Severity High Analysis Summary The STOP/DJVU ransomware initially made headlines in 2018 and has since been attacking individuals all around the world. It’s widespread on torrent […]September 11, 2023
Severity High Analysis Summary Stealc is a new malware that was first marketed by an actor named Plymouth on the XSS and BHF Russian-speaking underground forums […]September 11, 2023
Severity High Analysis Summary CVE-2023-4807 OpenSSL is vulnerable to a denial of service, caused by a state corruption flaw in the POLY1305 MAC (message authentication code) […]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 – ICS: Delta Electronics CNCSoft-B DOPSoft Vulnerability
September 11, 2023
Rewterz Threat Alert – “Stealc” – An Information Stealer Malware – Active IOCs
September 11, 2023
Severity
High
Analysis Summary
CVE-2023-4807
OpenSSL is vulnerable to a denial of service, caused by a state corruption flaw in the POLY1305 MAC (message authentication code) implementation, when running on newer X86_64 processors supporting the AVX512-IFMA instructions. By sending a specially crafted request, a local attacker could exploit this vulnerability to cause the application to crash.
Impact
- Denial of Service
Indicators Of Compromise
CVE
- CVE-2023-4807
Affected Vendors
OpenSSL
Affected Products
- OpenSSL 1.1.1
- OpenSSL OpenSSL 3.0.0
- OpenSSL 3.1.0
- OpenSSL 1.1.1v
Remediation
Refer to OpenSSL Security Advisory for patch, upgrade or suggested workaround information.