CVE-2022-44640

Heimdal before 7.7.1 allows remote attackers to execute arbitrary code because of an invalid free in the ASN.1 codec used by the Key Distribution Center (KDC)

Critical · published December 25, 2022

CVSS v3.1
9.8
EPSS
2%
Percentile
82.9
In the wild
Unconfirmed
What it is

🔥 An invalid free in Heimdal's ASN.1 codec can let remote attackers execute arbitrary code like a magician pulling bunnies out of hats — except these bunnies could wreak havoc! Think of it like a hotel concierge who accidentally hands out duplicate room keys — any guest can waltz into any room, potentially causing chaos. That’s how this vulnerability allows attackers to gain access to sensitive systems. An attacker could exploit this flaw to run malicious code remotely, potentially gaining full control over the affected system. This could lead to unauthorized access, data theft, or even complete system compromise. The implications of such access are absolutely devastating!

Put simply

Think of it like a hotel concierge who accidentally hands out duplicate room keys — any guest can waltz into any room, potentially causing chaos. That’s how this vulnerability allows attackers to gain access to sensitive systems. Heimdal versions prior to 7.7.1 contain a vulnerability in the Key Distribution Center (KDC) due to an improper memory management issue in the ASN.1 codec, allowing attackers to exploit this flaw to execute arbitrary code.

What to do

An attacker could exploit this flaw to run malicious code remotely, potentially gaining full control over the affected system. This could lead to unauthorized access, data theft, or even complete system compromise. The implications of such access are absolutely devastating! Update Heimdal immediately to version 7.7.1 or later to patch this vulnerability. Additionally, conduct a thorough review of your system to ensure no unauthorized changes have been made. Security audits are also a good practice to prevent future issues. You've got this! Follow these steps, and you’ll be back in control in no time! 🛡️

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.02264 · 82.9th percentile
Published
2022-12-25T00:00Z
EPSS history
Timeline
  • 25 DEC 00:00Z
    Heimdal before 7.7.1 allows remote attackers to execute arbitrary code because of an invalid free in the ASN.1 codec used by the Key Distribution Center (KDC)
    cvelistv5