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March 19, 2023Severity Medium Analysis Summary CVE-2023-0027 Rockwell Automation Modbus TCP AOI Server could allow a remote attacker to obtain sensitive information. By sending a malformed message, an […]March 17, 2023Severity High Analysis Summary CVE-2023-27984 CVSS:7.8 Schneider Electric IGSS could allow a remote attacker to execute arbitrary code on the system, caused by improper input validation […]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 […]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
March 19, 2023Severity Medium Analysis Summary CVE-2023-0027 Rockwell Automation Modbus TCP AOI Server could allow a remote attacker to obtain sensitive information. By sending a malformed message, an […]March 17, 2023Severity High Analysis Summary CVE-2023-27984 CVSS:7.8 Schneider Electric IGSS could allow a remote attacker to execute arbitrary code on the system, caused by improper input validation […]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 […]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-2018-5848 – Linux Kernel ‘wmi_set_ie()’ Buffer Overflow Vulnerability
December 6, 2018Rewterz Threat Advisory – Satan Ransomware Variant Exploits 10 Server-Side Flaws
December 11, 2018
A new vulnerability allows a low-privileged user account on most Linux operating systems with UID value greater than 2147483647 to execute any systemctl command.
IMPACT: MEDIUM
PUBLISH DATE: 10-DECEMBER-2018
OVERVIEW
A flaw was found in PolicyKit in Linux (aka polkit) 0.115 that allows a user with a UID greater than INT_MAX to successfully execute any systemctl command, which means privilege escalation.
ANALYSIS
The vulnerability is reported to be in PolicyKit, an application-level toolkit for Unix-like operating systems that defines policies, handles system privileges and serves as communication medium between non-privileged and privileged processes.
PolicyKit’s improper validation of permission requests for any low-privileged user with UID greater than INT_MAX results in this flaw. INT_MAX is a constant in computer programming that defines what maximum value an integer variable can store, which equals to 2147483647 (in hexadecimal 0x7FFFFFFF).
Thus, a user account created on an affected Linux system with any UID greater than INT_MAX value will be allowed by the PolicyKit to successfully execute any systemctl command.
AFFECTED PRODUCTS
PolicyKit version 0.115
(It’s preinstalled on most popular Linux distributions)
MITIGATION
The flaw is fixed in versions policykit-1/0.105-18+deb9u1, policykit-1/0.105-23, policykit-1/0.115-3.
Upgrade your policykit-1 packages.
It is also recommended that system administrators should not allow any negative UIDs or UIDs greater than 2147483646 in order to avoid falling victim to this vulnerability.
If you think you are a victim of a cyber-attack, immediately send an e-mail to soc@rewterz.com.