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    Rewterz Threat Advisory – Oracle Linux update for kernel-uek

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    March 22, 2023
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    Rewterz Threat Alert – Mekotio Banking Trojan aka Melcoz – Active IOCs
    Severity Medium Analysis Summary Mekotio is a banking trojan that targets users in Latin America and Europe. It is primarily distributed via phishing emails and infected […]
    March 22, 2023
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    Rewterz Threat Update – Cyber Threat Intelligence Advisory – 23rd March Pakistan Day
    Analysis Summary Overview – 23rd Mar – A Big Day –  As we approach the 23rd of March, Pakistan Day, organizations and individuals should be aware […]
    March 22, 2023
    March 22, 2023
    Rewterz Threat Advisory -Multiple Jenkins Products Vulnerabilities
    Severity High Analysis Summary CVE-2023-28684 CVSS:7.1 Jenkins remote-jobs-view-plugin Plugin could allow a remote authenticated attacker to obtain sensitive information, caused by improper handling of XML external […]

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    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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    Rewterz Threat Advisory – Oracle Linux update for kernel-uek

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    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.

  • Services

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    March 22, 2023
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    Rewterz Threat Alert – Mekotio Banking Trojan aka Melcoz – Active IOCs
    Severity Medium Analysis Summary Mekotio is a banking trojan that targets users in Latin America and Europe. It is primarily distributed via phishing emails and infected […]
    March 22, 2023
    March 22, 2023
    Rewterz Threat Update – Cyber Threat Intelligence Advisory – 23rd March Pakistan Day
    Analysis Summary Overview – 23rd Mar – A Big Day –  As we approach the 23rd of March, Pakistan Day, organizations and individuals should be aware […]
    March 22, 2023
    March 22, 2023
    Rewterz Threat Advisory -Multiple Jenkins Products Vulnerabilities
    Severity High Analysis Summary CVE-2023-28684 CVSS:7.1 Jenkins remote-jobs-view-plugin Plugin could allow a remote authenticated attacker to obtain sensitive information, caused by improper handling of XML external […]

    Threat Insights

    16
    pdf-file (1)
    Annual Threat Intelligence Report 2022
    • Threat Advisories
    • Monthly Threat Insights
    • Threat Intelligence Reports
  • Why Rewterz?

    About Us

    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.

    Read More

    play_btn_Smallplay_btn_hover_Small
    leadership

    Our Leadership

    Our leadership team brings together years of knowledge and experience in cybersecurity to drive our company's mission and vision. Our team is passionate about delivering high-quality products and services, leading by example and assisting our clients in securing their organization’s environment.
    help

    CSR

    At Rewterz, we believe that businesses have a responsibility to impact positively and contribute to the well-being of our communities as well as the planet. That's why we are committed to operating in a socially responsible and sustainable way.

    Connect with Us

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Rewterz Threat Advisory – CVE-2018-8460 & CVE-2018-8491 – Microsoft Internet Explorer 11 Multiple Memory Corruption Vulnerabilities
October 12, 2018
Rewterz
Rewterz Threat Advisory – Google Chrome Multiple Vulnerabilities
October 17, 2018

Rewterz Threat Advisory – Oracle Linux update for kernel-uek

October 12, 2018

Multiple vulnerabilities are found in Oracle Linux Kernel which have been patched in the updated version.

 

 

IMPACT:  NORMAL

 

 

PUBLISH DATE:  12-10-2018

 

 

OVERVIEW

 

 

Oracle Linux has issued an update for kernel. This update patches multiple vulnerabilities, which can be exploited by people with malicious intent, or by local users to disclose sensitive information, cause a DoS (Denial of Service), and gain elevated privileges.

 

 

ANALYSIS

 

 

The Following vulnerabilities have been detected in Oracle Linux 7 which have been patched in its updated version.

 

 

CVE-2018-14678

 

 

Linux kernel through 4.17.11 has an issue, as used in Xen through 4.11.x. The xen_failsafe_callback entry point in arch/x86/entry/entry_64.S fails to maintain RBX properly, which allows for a Denial of Service (uninitialized memory usage and system crash) caused by a local user. Within Xen, 64-bit x86 PV Linux guest OS users can trigger a guest OS crash or attain escalated privileges.

 

 

CVE-2017-13695

 

 

The acpi_ns_evaluate() function in drivers/acpi/acpica/nseval.c in the Linux kernel through 4.12.9 does not flush the operand cache and causes a kernel stack dump. This enables local users to obtain sensitive information from kernel memory as well as bypass the KASLR protection mechanism (in the kernel through 4.9) via a crafted ACPI table.

 

 

CVE-2018-12896

 

 

An issue was discovered in the Linux kernel through 4.17.3. The overrun accounting works in a way that causes an Integer Overflow in kernel/time/posix-timers.c in the POSIX timer code. Depending on interval and expiry time values, the overrun can be larger than INT_MAX, but the accounting is int based. This basically makes the accounting values, which are visible to user space via timer_getoverrun(2) and siginfo::si_overrun, random. Similarly, using crafted mmap, futex, timer_create, and timer_settime system calls, a local user will be enabled to cause a Denial of Service (signed integer flow).

 

 

CVE-2018-16658

 

 

An issue was discovered in the Linux kernel before 4.18.6. The cdrom_ioctl_drive_status faces an information leak in drivers/cdrom/cdrom.c which could be used by local attackers to read kernel memory. It happens because a cast from unsigned long to int interferes with bounds checking.

 

 

CVE-2018-7492

 

 

A NULL pointer dereference was found in the net/rds/rdma.c __rds_rdma_map() function in the Linux kernel before 4.14.7. Exploiting this, local attackers can cause a system panic and a denial-of-service, related to RDS_GET_MR and RDS_GET_MR_FOR_DEST.

 

 

AFFECTED PRODUCTS

 

 

Oracle Linux 7

 

 

UPDATES

 

 

Apply updated packages concerning UEK Release 5 (x86-64, mainline Linux Kernel version 4.14.35) or UEK Release 5 (aarch64, mainline Linux Kernel version 4.14.35) via the yum or rpm utility (please see the vendor’s advisory for the packages).

 

https://linux.oracle.com/errata/ELSA-2018-4242.html

 

If you think you’re a victim of a cyber-attack, immediately send an email to info@rewterz.com.

Platform

  • Rewterz XDR
  • Rewterz Defense
  • Rewterz Threat Intelligence

Managed Security Services

  • Managed Security Monitoring
  • Remote SOC
  • Onsite SOC
  • Hybrid SOC

Assess

  • Compromise Assessment
  • APT Assessment
  • Penetration Testing
  • Architecture Design & Review
  • Red Team Assessment
  • Purple Team Assessment
  • Social Engineering
  • Source Code Review

Transform

  • SOC Consultancy
  • SOC Maturity Assessment
  • SOC Model Evaluation
  • SOC Gap Analysis
  • SIEM Gap Analysis
  • SIEM Optimization
  • SOC Content Pack

Train

  • Simulated Cyber Attack Exercise
  • Tabletop Exercise
  • Security Awareness and Training

Respond

  • Incident Analysis
  • Incident Response

Threat Insights

  • Threat Advisories
  • Monthly Threat Insights
  • Threat Intelligence Reports

Resources

  • Blog
  • Press Releases

Connect With Us

  • Contact
  • Careers
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