Saturday, July 20, 2024

Threat Actor Claiming a 0-day in Linux LPE Via GRUB bootloader

A new threat actor has emerged, claiming a zero-day vulnerability in the Linux GRUB bootloader that allows for local privilege escalation (LPE).

This alarming development has raised significant concerns within the cybersecurity community.

A recent tweet from Dark Web Intelligence shared that the Threat Actor Claimed a 0-day in Linux LPE Via GRUB bootloader.

Scan Your Business Email Inbox to Find Advanced Email Threats - Try AI-Powered Free Threat Scan

The Vulnerability

The zero-day vulnerability reportedly affects the GRUB bootloader, a critical component most Linux systems use to manage the boot process.

The exploit allows attackers to bypass authentication mechanisms, potentially gaining root access to the system.

This type of vulnerability is hazardous as it can be used to install persistent and stealthy malware, making detection and mitigation challenging.

This is not the first time GRUB has been targeted.

In 2015, a similar vulnerability (CVE-2015-8370) was discovered. It allowed attackers to bypass authentication by pressing the backspace key 28 times at the GRUB username prompt.

This flaw affected GRUB versions from 1.98 to 2.02 and was widely exploited before being patched. 

More recently, in 2020, the BootHole vulnerability (CVE-2020-10713) was identified, which could be exploited to install malware during the boot process.

Implications and Response

The implications of this new zero-day are severe.

If exploited, attackers could gain complete control over affected systems, leading to data breaches, system disruptions, and potential espionage.

Major Linux distributions, including Debian, RedHat, and Ubuntu, have quickly released advisories and patches for previous GRUB vulnerabilities, and they are expected to respond similarly to this new threat.

Cybersecurity experts urge users to stay vigilant and apply security updates as soon as they become available.

Additionally, system administrators are advised to implement security hardening measures to mitigate the risk of exploitation during the window of vulnerability.

This new zero-day vulnerability in the Linux GRUB bootloader underscores the ongoing challenges in securing critical system components.

As the cybersecurity community works to address this threat, users must remain proactive in maintaining their systems’ security.

Free Webinar! 3 Security Trends to Maximize MSP Growth -> Register For Free


Latest articles

Hackers Claiming Dettol Data Breach: 453,646 users Impacted

A significant data breach has been reported by a threat actor known as 'Hana,'...

CrowdStrike Update Triggers Widespread Windows BSOD Crashes

A recent update from cybersecurity firm CrowdStrike has caused significant disruptions for Windows users,...

Operation Spincaster Disrupts Approval Phishing Technique that Drains Victim’s Wallets

Chainalysis has launched Operation Spincaster, an initiative to disrupt approval phishing scams that have...

Octo Tempest Know for Attacking VMWare ESXi Servers Added RansomHub & Qilin to Its Arsenal

Threat actors often attack VMware ESXi servers since they accommodate many virtual machines, which...

TAG-100 Actors Using Open-Source Tools To Attack Gov & Private Orgs

Hackers exploit open-source tools to execute attacks because they are readily available, well-documented, and...

macOS Users Beware Of Weaponized Meeting App From North Korean Hackers

Meeting apps are often targeted and turned into weapons by hackers as they are...

Hackers Exploiting Legitimate RMM Tools With BugSleep Malware

Since October 2023, MuddyWater, which is an Iranian threat group linked to MOIS, has...
Divya is a Senior Journalist at GBhackers covering Cyber Attacks, Threats, Breaches, Vulnerabilities and other happenings in the cyber world.

Free Webinar

Low Rate DDoS Attack

9 of 10 sites on the AppTrana network have faced a DDoS attack in the last 30 days.
Some DDoS attacks could readily be blocked by rate-limiting, IP reputation checks and other basic mitigation methods.
More than 50% of the DDoS attacks are employing botnets to send slow DDoS attacks where millions of IPs are being employed to send one or two requests per minute..
Key takeaways include:

  • The mechanics of a low-DDoS attack
  • Fundamentals of behavioural AI and rate-limiting
  • Surgical mitigation actions to minimize false positives
  • Role of managed services in DDoS monitoring

Related Articles