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TI-2006-04749 Aliases CVE-2006-4924GHSA-8x5c-jhv9-65x6

sshd in OpenSSH before 4.4, when using the version 1 SSH protocol, allows remote…

Priority MEDIUM 61CWE-399Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
— Not recorded in CVSS 2.0
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · Complete
Fix status
Fixed

Attack profile from CVSS 2.0 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-399 and the CVSS impact.

Summary

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.

Why it matters now

EPSS 0.38118 98th percentileScored 2026-11-07
Fix Fixed Red Hat: 2 advisories

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 56

CPEVersionsRoleVendor
cpe:2.3:a:openbsd:openssh:1.2:*:*:*:*:*:*:*1.2VulnerableOpenBSD
cpe:2.3:a:openbsd:openssh:1.2.1:*:*:*:*:*:*:*1.2.1VulnerableOpenBSD
cpe:2.3:a:openbsd:openssh:1.2.2:*:*:*:*:*:*:*1.2.2VulnerableOpenBSD
cpe:2.3:a:openbsd:openssh:1.2.3:*:*:*:*:*:*:*1.2.3VulnerableOpenBSD
cpe:2.3:a:openbsd:openssh:1.2.27:*:*:*:*:*:*:*1.2.27VulnerableOpenBSD
cpe:2.3:a:openbsd:openssh:2.1:*:*:*:*:*:*:*2.1VulnerableOpenBSD
cpe:2.3:a:openbsd:openssh:2.1.1:*:*:*:*:*:*:*2.1.1VulnerableOpenBSD
cpe:2.3:a:openbsd:openssh:2.2:*:*:*:*:*:*:*2.2VulnerableOpenBSD
cpe:2.3:a:openbsd:openssh:2.3:*:*:*:*:*:*:*2.3VulnerableOpenBSD
cpe:2.3:a:openbsd:openssh:2.5:*:*:*:*:*:*:*2.5VulnerableOpenBSD
  • cpe:2.3:a:openbsd:openssh:1.2:*:*:*:*:*:*:* Versions 1.2 Vulnerable ·OpenBSD
  • cpe:2.3:a:openbsd:openssh:1.2.1:*:*:*:*:*:*:* Versions 1.2.1 Vulnerable ·OpenBSD
  • cpe:2.3:a:openbsd:openssh:1.2.2:*:*:*:*:*:*:* Versions 1.2.2 Vulnerable ·OpenBSD
  • cpe:2.3:a:openbsd:openssh:1.2.3:*:*:*:*:*:*:* Versions 1.2.3 Vulnerable ·OpenBSD
  • cpe:2.3:a:openbsd:openssh:1.2.27:*:*:*:*:*:*:* Versions 1.2.27 Vulnerable ·OpenBSD
  • cpe:2.3:a:openbsd:openssh:2.1:*:*:*:*:*:*:* Versions 2.1 Vulnerable ·OpenBSD
  • cpe:2.3:a:openbsd:openssh:2.1.1:*:*:*:*:*:*:* Versions 2.1.1 Vulnerable ·OpenBSD
  • cpe:2.3:a:openbsd:openssh:2.2:*:*:*:*:*:*:* Versions 2.2 Vulnerable ·OpenBSD
  • cpe:2.3:a:openbsd:openssh:2.3:*:*:*:*:*:*:* Versions 2.3 Vulnerable ·OpenBSD
  • cpe:2.3:a:openbsd:openssh:2.5:*:*:*:*:*:*:* Versions 2.5 Vulnerable ·OpenBSD
Show 46 more CPE
CPEVersionsRoleVendor
cpe:2.3:a:openbsd:openssh:2.5.1:*:*:*:*:*:*:*2.5.1VulnerableOpenBSD
cpe:2.3:a:openbsd:openssh:2.5.2:*:*:*:*:*:*:*2.5.2VulnerableOpenBSD
cpe:2.3:a:openbsd:openssh:2.9:*:*:*:*:*:*:*2.9VulnerableOpenBSD
cpe:2.3:a:openbsd:openssh:2.9.9:*:*:*:*:*:*:*2.9.9VulnerableOpenBSD
cpe:2.3:a:openbsd:openssh:2.9.9p2:*:*:*:*:*:*:*2.9.9p2VulnerableOpenBSD
cpe:2.3:a:openbsd:openssh:2.9p1:*:*:*:*:*:*:*2.9p1VulnerableOpenBSD
cpe:2.3:a:openbsd:openssh:2.9p2:*:*:*:*:*:*:*2.9p2VulnerableOpenBSD
cpe:2.3:a:openbsd:openssh:3.0:*:*:*:*:*:*:*3.0VulnerableOpenBSD
cpe:2.3:a:openbsd:openssh:3.0.1:*:*:*:*:*:*:*3.0.1VulnerableOpenBSD
cpe:2.3:a:openbsd:openssh:3.0.1p1:*:*:*:*:*:*:*3.0.1p1VulnerableOpenBSD
cpe:2.3:a:openbsd:openssh:3.0.2:*:*:*:*:*:*:*3.0.2VulnerableOpenBSD
cpe:2.3:a:openbsd:openssh:3.0.2p1:*:*:*:*:*:*:*3.0.2p1VulnerableOpenBSD
cpe:2.3:a:openbsd:openssh:3.0p1:*:*:*:*:*:*:*3.0p1VulnerableOpenBSD
cpe:2.3:a:openbsd:openssh:3.1:*:*:*:*:*:*:*3.1VulnerableOpenBSD
cpe:2.3:a:openbsd:openssh:3.1p1:*:*:*:*:*:*:*3.1p1VulnerableOpenBSD
cpe:2.3:a:openbsd:openssh:3.2:*:*:*:*:*:*:*3.2VulnerableOpenBSD
cpe:2.3:a:openbsd:openssh:3.2.2:*:*:*:*:*:*:*3.2.2VulnerableOpenBSD
cpe:2.3:a:openbsd:openssh:3.2.2p1:*:*:*:*:*:*:*3.2.2p1VulnerableOpenBSD
cpe:2.3:a:openbsd:openssh:3.2.3p1:*:*:*:*:*:*:*3.2.3p1VulnerableOpenBSD
cpe:2.3:a:openbsd:openssh:3.3:*:*:*:*:*:*:*3.3VulnerableOpenBSD
cpe:2.3:a:openbsd:openssh:3.3p1:*:*:*:*:*:*:*3.3p1VulnerableOpenBSD
cpe:2.3:a:openbsd:openssh:3.4:*:*:*:*:*:*:*3.4VulnerableOpenBSD
cpe:2.3:a:openbsd:openssh:3.4p1:*:*:*:*:*:*:*3.4p1VulnerableOpenBSD
cpe:2.3:a:openbsd:openssh:3.5:*:*:*:*:*:*:*3.5VulnerableOpenBSD
cpe:2.3:a:openbsd:openssh:3.5p1:*:*:*:*:*:*:*3.5p1VulnerableOpenBSD
cpe:2.3:a:openbsd:openssh:3.6:*:*:*:*:*:*:*3.6VulnerableOpenBSD
cpe:2.3:a:openbsd:openssh:3.6.1:*:*:*:*:*:*:*3.6.1VulnerableOpenBSD
cpe:2.3:a:openbsd:openssh:3.6.1p1:*:*:*:*:*:*:*3.6.1p1VulnerableOpenBSD
cpe:2.3:a:openbsd:openssh:3.6.1p2:*:*:*:*:*:*:*3.6.1p2VulnerableOpenBSD
cpe:2.3:a:openbsd:openssh:3.7:*:*:*:*:*:*:*3.7VulnerableOpenBSD
cpe:2.3:a:openbsd:openssh:3.7.1:*:*:*:*:*:*:*3.7.1VulnerableOpenBSD
cpe:2.3:a:openbsd:openssh:3.7.1p1:*:*:*:*:*:*:*3.7.1p1VulnerableOpenBSD
cpe:2.3:a:openbsd:openssh:3.7.1p2:*:*:*:*:*:*:*3.7.1p2VulnerableOpenBSD
cpe:2.3:a:openbsd:openssh:3.8:*:*:*:*:*:*:*3.8VulnerableOpenBSD
cpe:2.3:a:openbsd:openssh:3.8.1:*:*:*:*:*:*:*3.8.1VulnerableOpenBSD
cpe:2.3:a:openbsd:openssh:3.8.1p1:*:*:*:*:*:*:*3.8.1p1VulnerableOpenBSD
cpe:2.3:a:openbsd:openssh:3.9:*:*:*:*:*:*:*3.9VulnerableOpenBSD
cpe:2.3:a:openbsd:openssh:3.9.1:*:*:*:*:*:*:*3.9.1VulnerableOpenBSD
cpe:2.3:a:openbsd:openssh:3.9.1p1:*:*:*:*:*:*:*3.9.1p1VulnerableOpenBSD
cpe:2.3:a:openbsd:openssh:4.0:*:*:*:*:*:*:*4.0VulnerableOpenBSD
cpe:2.3:a:openbsd:openssh:4.0p1:*:*:*:*:*:*:*4.0p1VulnerableOpenBSD
cpe:2.3:a:openbsd:openssh:4.1p1:*:*:*:*:*:*:*4.1p1VulnerableOpenBSD
cpe:2.3:a:openbsd:openssh:4.2:*:*:*:*:*:*:*4.2VulnerableOpenBSD
cpe:2.3:a:openbsd:openssh:4.2p1:*:*:*:*:*:*:*4.2p1VulnerableOpenBSD
cpe:2.3:a:openbsd:openssh:4.3:*:*:*:*:*:*:*4.3VulnerableOpenBSD
cpe:2.3:a:openbsd:openssh:4.3p1:*:*:*:*:*:*:*4.3p1VulnerableOpenBSD
  • cpe:2.3:a:openbsd:openssh:2.5.1:*:*:*:*:*:*:* Versions 2.5.1 Vulnerable ·OpenBSD
  • cpe:2.3:a:openbsd:openssh:2.5.2:*:*:*:*:*:*:* Versions 2.5.2 Vulnerable ·OpenBSD
  • cpe:2.3:a:openbsd:openssh:2.9:*:*:*:*:*:*:* Versions 2.9 Vulnerable ·OpenBSD
  • cpe:2.3:a:openbsd:openssh:2.9.9:*:*:*:*:*:*:* Versions 2.9.9 Vulnerable ·OpenBSD
  • cpe:2.3:a:openbsd:openssh:2.9.9p2:*:*:*:*:*:*:* Versions 2.9.9p2 Vulnerable ·OpenBSD
  • cpe:2.3:a:openbsd:openssh:2.9p1:*:*:*:*:*:*:* Versions 2.9p1 Vulnerable ·OpenBSD
  • cpe:2.3:a:openbsd:openssh:2.9p2:*:*:*:*:*:*:* Versions 2.9p2 Vulnerable ·OpenBSD
  • cpe:2.3:a:openbsd:openssh:3.0:*:*:*:*:*:*:* Versions 3.0 Vulnerable ·OpenBSD
  • cpe:2.3:a:openbsd:openssh:3.0.1:*:*:*:*:*:*:* Versions 3.0.1 Vulnerable ·OpenBSD
  • cpe:2.3:a:openbsd:openssh:3.0.1p1:*:*:*:*:*:*:* Versions 3.0.1p1 Vulnerable ·OpenBSD
  • cpe:2.3:a:openbsd:openssh:3.0.2:*:*:*:*:*:*:* Versions 3.0.2 Vulnerable ·OpenBSD
  • cpe:2.3:a:openbsd:openssh:3.0.2p1:*:*:*:*:*:*:* Versions 3.0.2p1 Vulnerable ·OpenBSD
  • cpe:2.3:a:openbsd:openssh:3.0p1:*:*:*:*:*:*:* Versions 3.0p1 Vulnerable ·OpenBSD
  • cpe:2.3:a:openbsd:openssh:3.1:*:*:*:*:*:*:* Versions 3.1 Vulnerable ·OpenBSD
  • cpe:2.3:a:openbsd:openssh:3.1p1:*:*:*:*:*:*:* Versions 3.1p1 Vulnerable ·OpenBSD
  • cpe:2.3:a:openbsd:openssh:3.2:*:*:*:*:*:*:* Versions 3.2 Vulnerable ·OpenBSD
  • cpe:2.3:a:openbsd:openssh:3.2.2:*:*:*:*:*:*:* Versions 3.2.2 Vulnerable ·OpenBSD
  • cpe:2.3:a:openbsd:openssh:3.2.2p1:*:*:*:*:*:*:* Versions 3.2.2p1 Vulnerable ·OpenBSD
  • cpe:2.3:a:openbsd:openssh:3.2.3p1:*:*:*:*:*:*:* Versions 3.2.3p1 Vulnerable ·OpenBSD
  • cpe:2.3:a:openbsd:openssh:3.3:*:*:*:*:*:*:* Versions 3.3 Vulnerable ·OpenBSD
  • cpe:2.3:a:openbsd:openssh:3.3p1:*:*:*:*:*:*:* Versions 3.3p1 Vulnerable ·OpenBSD
  • cpe:2.3:a:openbsd:openssh:3.4:*:*:*:*:*:*:* Versions 3.4 Vulnerable ·OpenBSD
  • cpe:2.3:a:openbsd:openssh:3.4p1:*:*:*:*:*:*:* Versions 3.4p1 Vulnerable ·OpenBSD
  • cpe:2.3:a:openbsd:openssh:3.5:*:*:*:*:*:*:* Versions 3.5 Vulnerable ·OpenBSD
  • cpe:2.3:a:openbsd:openssh:3.5p1:*:*:*:*:*:*:* Versions 3.5p1 Vulnerable ·OpenBSD
  • cpe:2.3:a:openbsd:openssh:3.6:*:*:*:*:*:*:* Versions 3.6 Vulnerable ·OpenBSD
  • cpe:2.3:a:openbsd:openssh:3.6.1:*:*:*:*:*:*:* Versions 3.6.1 Vulnerable ·OpenBSD
  • cpe:2.3:a:openbsd:openssh:3.6.1p1:*:*:*:*:*:*:* Versions 3.6.1p1 Vulnerable ·OpenBSD
  • cpe:2.3:a:openbsd:openssh:3.6.1p2:*:*:*:*:*:*:* Versions 3.6.1p2 Vulnerable ·OpenBSD
  • cpe:2.3:a:openbsd:openssh:3.7:*:*:*:*:*:*:* Versions 3.7 Vulnerable ·OpenBSD
  • cpe:2.3:a:openbsd:openssh:3.7.1:*:*:*:*:*:*:* Versions 3.7.1 Vulnerable ·OpenBSD
  • cpe:2.3:a:openbsd:openssh:3.7.1p1:*:*:*:*:*:*:* Versions 3.7.1p1 Vulnerable ·OpenBSD
  • cpe:2.3:a:openbsd:openssh:3.7.1p2:*:*:*:*:*:*:* Versions 3.7.1p2 Vulnerable ·OpenBSD
  • cpe:2.3:a:openbsd:openssh:3.8:*:*:*:*:*:*:* Versions 3.8 Vulnerable ·OpenBSD
  • cpe:2.3:a:openbsd:openssh:3.8.1:*:*:*:*:*:*:* Versions 3.8.1 Vulnerable ·OpenBSD
  • cpe:2.3:a:openbsd:openssh:3.8.1p1:*:*:*:*:*:*:* Versions 3.8.1p1 Vulnerable ·OpenBSD
  • cpe:2.3:a:openbsd:openssh:3.9:*:*:*:*:*:*:* Versions 3.9 Vulnerable ·OpenBSD
  • cpe:2.3:a:openbsd:openssh:3.9.1:*:*:*:*:*:*:* Versions 3.9.1 Vulnerable ·OpenBSD
  • cpe:2.3:a:openbsd:openssh:3.9.1p1:*:*:*:*:*:*:* Versions 3.9.1p1 Vulnerable ·OpenBSD
  • cpe:2.3:a:openbsd:openssh:4.0:*:*:*:*:*:*:* Versions 4.0 Vulnerable ·OpenBSD
  • cpe:2.3:a:openbsd:openssh:4.0p1:*:*:*:*:*:*:* Versions 4.0p1 Vulnerable ·OpenBSD
  • cpe:2.3:a:openbsd:openssh:4.1p1:*:*:*:*:*:*:* Versions 4.1p1 Vulnerable ·OpenBSD
  • cpe:2.3:a:openbsd:openssh:4.2:*:*:*:*:*:*:* Versions 4.2 Vulnerable ·OpenBSD
  • cpe:2.3:a:openbsd:openssh:4.2p1:*:*:*:*:*:*:* Versions 4.2p1 Vulnerable ·OpenBSD
  • cpe:2.3:a:openbsd:openssh:4.3:*:*:*:*:*:*:* Versions 4.3 Vulnerable ·OpenBSD
  • cpe:2.3:a:openbsd:openssh:4.3p1:*:*:*:*:*:*:* Versions 4.3p1 Vulnerable ·OpenBSD

Remediation

Red Hat 2 advisories

  • RHSA-2006:0698 Released 2006-09-29 · Red Hat rating Important
    openssh security update
    • Red Hat Enterprise Linux AS (Advanced Server) version 2.1 openssh-3.1p1-21, openssh-3.1p1-21.i386, openssh-3.1p1-21.ia64 +8
    • Red Hat Enterprise Linux ES version 2.1 openssh-3.1p1-21, openssh-3.1p1-21.i386, openssh-askpass-3.1p1-21.i386 +3
    • Red Hat Enterprise Linux WS version 2.1 openssh-3.1p1-21, openssh-3.1p1-21.i386, openssh-askpass-3.1p1-21.i386 +3
    • Red Hat Linux Advanced Workstation 2.1 openssh-3.1p1-21, openssh-3.1p1-21.ia64, openssh-askpass-3.1p1-21.ia64 +3
  • RHSA-2006:0697 Released 2006-09-29 · Red Hat rating Important
    openssh security update
    • Red Hat Desktop version 3 openssh-3.6.1p2-33.30.12, openssh-3.6.1p2-33.30.12.i386, openssh-askpass-3.6.1p2-33.30.12 +7
    • Red Hat Enterprise Linux AS version 3 openssh-3.6.1p2-33.30.12, openssh-3.6.1p2-33.30.12.i386, openssh-3.6.1p2-33.30.12.ia64 +17
    • Red Hat Enterprise Linux AS version 4 openssh-3.9p1-8.RHEL4.17, openssh-3.9p1-8.RHEL4.17.i386, openssh-3.9p1-8.RHEL4.17.ia64 +17
    • Red Hat Enterprise Linux Desktop version 4 openssh-3.9p1-8.RHEL4.17, openssh-3.9p1-8.RHEL4.17.i386, openssh-askpass-3.9p1-8.RHEL4.17 +7
    • Red Hat Enterprise Linux ES version 3 openssh-3.6.1p2-33.30.12, openssh-3.6.1p2-33.30.12.i386, openssh-3.6.1p2-33.30.12.ia64 +12
    • Red Hat Enterprise Linux ES version 4 openssh-3.9p1-8.RHEL4.17, openssh-3.9p1-8.RHEL4.17.i386, openssh-3.9p1-8.RHEL4.17.ia64 +12
    • Red Hat Enterprise Linux WS version 3 openssh-3.6.1p2-33.30.12, openssh-3.6.1p2-33.30.12.i386, openssh-3.6.1p2-33.30.12.ia64 +12
    • Red Hat Enterprise Linux WS version 4 openssh-3.9p1-8.RHEL4.17, openssh-3.9p1-8.RHEL4.17.i386, openssh-3.9p1-8.RHEL4.17.ia64 +12

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Desktop version 3Fixed RHSA-2006:0697
Red Hat Enterprise Linux AS (Advanced Server) version 2.1 Fixed RHSA-2006:0698
Red Hat Enterprise Linux AS version 3Fixed RHSA-2006:0697
Red Hat Enterprise Linux AS version 4Fixed RHSA-2006:0697
Red Hat Enterprise Linux Desktop version 4Fixed RHSA-2006:0697
Red Hat Enterprise Linux ES version 2.1Fixed RHSA-2006:0698
Red Hat Enterprise Linux ES version 3Fixed RHSA-2006:0697
Red Hat Enterprise Linux ES version 4Fixed RHSA-2006:0697
Red Hat Enterprise Linux WS version 2.1Fixed RHSA-2006:0698
Red Hat Enterprise Linux WS version 3Fixed RHSA-2006:0697
Red Hat Enterprise Linux WS version 4Fixed RHSA-2006:0697
Red Hat Linux Advanced Workstation 2.1Fixed RHSA-2006:0698

Timeline

  1. 2026-10-02 Threatist record created from CVE-2006-4924
  2. 2026-10-03 Alias added: GHSA-8x5c-jhv9-65x6

References

Patch 3

Advisory 18

Other 23

  • TI-2023-19792 The PKCS#11 feature in ssh-agent in OpenSSH before 9.3p2 has an insufficiently… CVSS 3.1CRITICAL 9.8
  • TI-2024-05929 Openssh: regresshion - race condition in ssh allows rce/dos CVSS 3.1HIGH 8.1
  • TI-2023-10601 OpenSSH server (sshd) 9.1 introduced a double-free vulnerability during… CVSS 3.1MEDIUM 6.5
  • TI-2018-11033 OpenSSH through 7.7 is prone to a user enumeration vulnerability due to not delaying… CVSS 3.1MEDIUM 5.9
  • TI-2016-08105 Untrusted search path vulnerability in ssh-agent.c in ssh-agent in OpenSSH before 7.4… CVSS 3.1HIGH 7.3
  • TI-2023-28040 In ssh in OpenSSH before 9.6, OS command injection might occur if a user name or host… CVSS 3.1MEDIUM 6.5
See all 145 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences