Saturday, June 22, 2024

New Dirty Sock Vulnerability Allows Hackers to Gain Root Access on Linux systems

The researcher discovered a new privilege escalation vulnerability called Dirty Sock on Ubuntu Linux default installation lets attacker gain immediate root to the system.

This serious vulnerability existing in the Linux system’s default service called snapd API that allows any local user taking advantage and exploiting the flaw to gain the complete root access .

Chris Moberly, a researcher refer to this vulnerability as Dirty Sock and he was discovered in end of the January and reported to the Canonical team, a company behind the Ubuntu.

He was released an exploit that works 100% of the time on fresh, default installations of Ubuntu Server and Desktop.

Management of locally installed snaps and communication with ta his online store are partially handled by a systemd service called “snapd” ( which is running in Ubuntu under root user.

This vulnerability exactly located in the Snapd that serves up a REST API attached to a local UNIX_AF socket.

The researcher said, Access control to restricted API functions is accomplished by querying the UID associated with any connections made to that socket which allow to users access the any API function.

By having an access to the API function, attackers will use the different method to gain the root access.

Moberly published a Proof-of-code exploit in GitHub that was written in Python in order to perform the following operation against this vulnerability and Snapd versions 2.28 through 2.37 are all vulnerable to the Dirty Sock exploit.

  1. Creates a random file with the string ‘;uid=0;’ in the name
  2. Binds a socket to this file
  3. Connects to the snapd API
  4. Deletes the trojan snap (if it was left over from a previous aborted run)
  5. Installs the trojan snap (at which point the install hook will run)
  6. Deletes the trojan snap
  7. Deletes the temporary socket file
  8. Congratulates you on your success

This exploits only working for a local attacker to escalate the privilege in target Linux system and will not work remotely.

Ubuntu Team patched this vulnerability and released security updates for the Ubuntu Linux OS that tracked as CVE-2019-7304.

In this case, Linux users urged to update their system as soon as possible in order to avoid the exploiting circumstances.

You can follow us on LinkedinTwitterFacebook for daily Cybersecurity updates also you can take the Best Cybersecurity courses online to keep your self-updated.

Also Read:

New Linux Coin Miner that Deletes Other Linux Malware and Coin Miners

A New Critical RCE Vulnerability in LibreOffice that Exploit Windows & Linux Systems


Latest articles

PrestaShop Website Under Injection Attack Via Facebook Module

A critical vulnerability has been discovered in the "Facebook" module (pkfacebook) from for...

Beware Of Illegal OTT Platforms That Exposes Sensitive Personal Information

A recent rise in data breaches from illegal Chinese OTT platforms exposes that user...

Beware Of Zergeca Botnet with Advanced Scanning & Persistence Features

A new botnet named Zergeca has emerged, showcasing advanced capabilities that set it apart...

Mailcow Mail Server Vulnerability Let Attackers Execute Remote Code

Two critical vulnerabilities (CVE-2024-31204 and CVE-2024-30270) affecting Mailcow versions before 2024-04 allow attackers to...

Hackers Attacking Vaults, Buckets, And Secrets To Steal Data

Hackers target vaults, buckets, and secrets to access some of the most classified and...

Hackers Weaponizing Windows Shortcut Files for Phishing

LNK files, a shortcut file type in Windows OS, provide easy access to programs,...

New Highly Evasive SquidLoader Attacking Employees Mimic As Word Document

Researchers discovered a new malware loader named SquidLoader targeting Chinese organizations, which arrives as...
BALAJI is an Ex-Security Researcher (Threat Research Labs) at Comodo Cybersecurity. Editor-in-Chief & Co-Founder - Cyber Security News & GBHackers On Security.

Free Webinar

API Vulnerability Scanning

71% of the internet traffic comes from APIs so APIs have become soft targets for hackers.Securing APIs is a simple workflow provided you find API specific vulnerabilities and protect them.In the upcoming webinar, join Vivek Gopalan, VP of Products at Indusface as he takes you through the fundamentals of API vulnerability scanning..
Key takeaways include:

  • Scan API endpoints for OWASP API Top 10 vulnerabilities
  • Perform API penetration testing for business logic vulnerabilities
  • Prioritize the most critical vulnerabilities with AcuRisQ
  • Workflow automation for this entire process

Related Articles