UpHeron
All vulnerabilities

Servers and applications

CVE-2006-4924

sshd in OpenSSH before 4.4, when using the version 1 SSH protocol, allows remote attackers to cause a denial of service (CPU consumption) via an SSH packet that contains duplicate blocks, which is not properly handled by the CRC compensation attack detector.

Severity
High 7.8
Published
27 Sept 2006
Last changed
16 Jun 2026
Added to UpHeron
21 Oct 2026
Exploit chance
38% in the next 30 daysHigher than 98% of CVEs. EPSS by FIRST, 12 Nov 2026
Weakness
CWE-399
Attack
Over the network · No login needed
Attacker can
Take it down
CVSS vector
AV:N/AC:L/Au:N/C:N/I:N/A:C
Sources
NVD

Affected software

SoftwareAffected versions
OpenSSHServers and applications · cpe:a:openbsd:openssh
  • Version 4.3p1
  • Version 4.3
  • Version 4.2p1
  • Version 4.2
All 56 release lines
  • Version 1.2
  • Version 1.2.1
  • Version 1.2.2
  • Version 1.2.3
  • Version 1.2.27
  • Version 2.1
  • Version 2.1.1
  • Version 2.2
  • Version 2.3
  • Version 2.5
  • Version 2.5.1
  • Version 2.5.2
  • Version 2.9
  • Version 2.9p1
  • Version 2.9p2
  • Version 2.9.9
  • Version 2.9.9p2
  • Version 3.0
  • Version 3.0p1
  • Version 3.0.1
  • Version 3.0.1p1
  • Version 3.0.2
  • Version 3.0.2p1
  • Version 3.1
  • Version 3.1p1
  • Version 3.2
  • Version 3.2.2
  • Version 3.2.2p1
  • Version 3.2.3p1
  • Version 3.3
  • Version 3.3p1
  • Version 3.4
  • Version 3.4p1
  • Version 3.5
  • Version 3.5p1
  • Version 3.6
  • Version 3.6.1
  • Version 3.6.1p1
  • Version 3.6.1p2
  • Version 3.7
  • Version 3.7.1
  • Version 3.7.1p1
  • Version 3.7.1p2
  • Version 3.8
  • Version 3.8.1
  • Version 3.8.1p1
  • Version 3.9
  • Version 3.9.1
  • Version 3.9.1p1
  • Version 4.0
  • Version 4.0p1
  • Version 4.1p1
  • Version 4.2
  • Version 4.2p1
  • Version 4.3
  • Version 4.3p1

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2006-4924
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2006-4924