CVE-2019-8351

Heimdal Thor Agent 2.5.17x before 2.5.173 does not verify X.509 certificates from TLS servers, which allows remote attackers to spoof servers and obtain…

published March 21, 2019

CVSS
—
EPSS
1%
Percentile
70.3
In the wild
Unconfirmed
What it is

⚠️ A crafty certificate can fool Heimdal Thor Agent into trusting a dangerous server — like a fake ID slipping past a bouncer! 🔥 Think of TLS certificates as the ID checks at a bar. If the bouncer doesn't verify the IDs properly, they might let in someone who could cause trouble. Similarly, if Heimdal Thor Agent doesn't verify X.509 certificates, it opens the door to potential data leaks. An attacker could exploit this oversight to impersonate a trusted server, leading to unauthorized access to sensitive information. This could result in data breaches or stolen credentials, potentially putting personal and company data at risk.

Put simply

Think of TLS certificates as the ID checks at a bar. If the bouncer doesn't verify the IDs properly, they might let in someone who could cause trouble. Similarly, if Heimdal Thor Agent doesn't verify X.509 certificates, it opens the door to potential data leaks. This vulnerability stems from Heimdal Thor Agent version 2.5.17x failing to verify X.509 certificates from TLS servers, allowing attackers to spoof legitimate servers and intercept sensitive data.

What to do

An attacker could exploit this oversight to impersonate a trusted server, leading to unauthorized access to sensitive information. This could result in data breaches or stolen credentials, potentially putting personal and company data at risk. Upgrade Heimdal Thor Agent to version 2.5.173 or later immediately to ensure proper verification of X.509 certificates. Additionally, monitor communications for any signs of spoofing and educate users about the risks of connecting to untrusted servers. 🛡️ You've got this! By addressing this vulnerability promptly, you’re taking crucial steps toward fortifying your security. 🚀

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.01305 · 70.3th percentile
Published
2019-03-21T20:28Z
EPSS history
Timeline
  • 21 MAR 20:28Z
    Heimdal Thor Agent 2.5.17x before 2.5.173 does not verify X.509 certificates from TLS servers, which allows remote attackers to spoof servers and obtain…
    cvelistv5