CISA has issued a warning about a vulnerability in unencrypted persistent cookies in the F5 BIG-IP Local Traffic Manager (LTM) module. This issue poses a risk for organizations using F5 BIG-IP, as it can be exploited by cybercriminals.
CISA warns that cybercriminals are using unencrypted persistent cookies to discover details about non-internet- facing devices on networks. This information can help them find and exploit vulnerabilities in other systems, increasing risks for organizations as attackers can gain broader access across the network.
By F2
/ Tuesday , June 24 2025
The U.S. House of Representatives has banned congressional staff from using WhatsApp on government devices due to security concerns, as...
Read More
By F2
/ Tuesday , June 24 2025
Kaspersky found a new mobile malware dubbed SparkKitty in Google Play and Apple App Store apps, targeting Android and iOS....
Read More
By F2
/ Tuesday , June 24 2025
OWASP has released its AI Testing Guide, a framework to help organizations find and fix vulnerabilities specific to AI systems....
Read More
By F2
/ Tuesday , June 24 2025
In a major milestone for the country’s digital infrastructure, Axentec PLC has officially launched Axentec Cloud, Bangladesh’s first Tier-4 cloud...
Read More
By infosecbulletin
/ Monday , June 23 2025
A hacking group reportedly linked to Russian government has been discovered using a new phishing method that bypasses two-factor authentication...
Read More
By infosecbulletin
/ Wednesday , June 18 2025
Russian cybersecurity experts discovered the first local data theft attacks using a modified version of legitimate near field communication (NFC)...
Read More
By infosecbulletin
/ Tuesday , June 17 2025
Cybersecurity researcher Jeremiah Fowler discovered an unsecured database with 170,360 records belonging to a real estate company. It contained personal...
Read More
By infosecbulletin
/ Tuesday , June 17 2025
GreyNoise found attempts to exploit CVE-2023-28771, a vulnerability in Zyxel's IKE affecting UDP port 500. The attack centers around CVE-2023-28771,...
Read More
By infosecbulletin
/ Tuesday , June 17 2025
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has recently included two high-risk vulnerabilities in its Known Exploited Vulnerabilities (KEV)...
Read More
By infosecbulletin
/ Monday , June 16 2025
SafetyDetectives’ Cybersecurity Team discovered a public post on a clear web forum in which a threat actor claimed to have...
Read More
The F5 BIG-IP LTM module uses persistent cookies for session continuity but can be vulnerable if these cookies are unencrypted. Attackers can exploit this to gather network information. F5 states that enabling cookie encryption uses a 192-bit AES cipher followed by Base64 encoding, which is crucial for protecting cookies from unauthorized access.
Without encryption, these cookies allow attackers to access the internal network structure, revealing details about other devices and their setups. This information can help them exploit vulnerabilities in the network.
CISA recommends that organizations using F5 BIG-IP devices encrypt their persistent cookies to mitigate risks. They also advise reviewing F5’s guidelines for properly configuring the BIG-IP LTM system for encrypted HTTP cookies. Additionally, F5 offers iHealth, a tool that alerts users when cookie encryption is disabled.
F5 BIG-IP solutions are widely used in various industries, including finance and healthcare. The vulnerability of unencrypted cookies poses risks like session hijacking and allows attackers to explore the network. Encrypting these persistent cookies can help organizations lessen their attack surface and safeguard their internal network from cyber threats.