CVE-2006-4924
sshd in OpenSSH before 4.4, when using the version 1 SSH protocol, allows remote attackers to...
7.8 HighPublic exploitFix available
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.
Exploit likelihood
38.1%Up 22.8 points since Feb 4, 2022
What each source reports
NVD Score used
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.
- Record
CVE-2006-4924- CVSS 2.0
- 7.8 High
AV:N/AC:L/Au:N/C:N/I:N/A:C - Weakness
- CWE-399
- Updated
- 2026-11-02
CVE List No score
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.
- Record
CVE-2006-4924- Updated
- 2026-11-02
EUVDEUVD-2006-4911 No score
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.
- Record
EUVD-2006-4911- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-8x5c-jhv9-65x6 No score
sshd in OpenSSH before 4.4, when using the version 1 SSH protocol, allows remote attackers to...
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.
- Record
GHSA-8x5c-jhv9-65x6- Updated
- 2026-11-02
OSV No score
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.
- Record
CVE-2006-4924- Updated
- 2026-11-02
OSVDEBIAN-CVE-2006-4924 No score
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.
- Record
DEBIAN-CVE-2006-4924- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
opensshDebian:12 |
before 1:4.3p2-4 | 1:4.3p2-4 |
opensshDebian:13 |
before 1:4.3p2-4 | 1:4.3p2-4 |
opensshDebian:14 |
before 1:4.3p2-4 | 1:4.3p2-4 |
openssh-krb5Debian:3.1 From an advisory covering 2 CVEs |
before 3.8.1p1-7sarge1, plus listed versions 3.8.1p1-7 |
3.8.1p1-7sarge1 |
opensshDebian:3.1 From an advisory covering 2 CVEs |
before 1:3.8.1p1-8.sarge.6, plus listed versions 1:3.8.1p1-8.sarge.4 |
1:3.8.1p1-8.sarge.6 |
opensshRed Hat:enterprise_linux:3::as From an advisory covering 2 CVEs |
before 0:3.6.1p2-33.30.12 | 0:3.6.1p2-33.30.12 |
openssh-askpassRed Hat:enterprise_linux:3::as From an advisory covering 2 CVEs |
before 0:3.6.1p2-33.30.12 | 0:3.6.1p2-33.30.12 |
openssh-askpass-gnomeRed Hat:enterprise_linux:3::as From an advisory covering 2 CVEs |
before 0:3.6.1p2-33.30.12 | 0:3.6.1p2-33.30.12 |
openssh-clientsRed Hat:enterprise_linux:3::as From an advisory covering 2 CVEs |
before 0:3.6.1p2-33.30.12 | 0:3.6.1p2-33.30.12 |
openssh-debuginfoRed Hat:enterprise_linux:3::as From an advisory covering 2 CVEs |
before 0:3.6.1p2-33.30.12 | 0:3.6.1p2-33.30.12 |
Show 63 moreShow less
| Package | Affected | Fixed |
|---|---|---|
openssh-serverRed Hat:enterprise_linux:3::as From an advisory covering 2 CVEs |
before 0:3.6.1p2-33.30.12 | 0:3.6.1p2-33.30.12 |
opensshRed Hat:enterprise_linux:3::desktop From an advisory covering 2 CVEs |
before 0:3.6.1p2-33.30.12 | 0:3.6.1p2-33.30.12 |
openssh-askpassRed Hat:enterprise_linux:3::desktop From an advisory covering 2 CVEs |
before 0:3.6.1p2-33.30.12 | 0:3.6.1p2-33.30.12 |
openssh-askpass-gnomeRed Hat:enterprise_linux:3::desktop From an advisory covering 2 CVEs |
before 0:3.6.1p2-33.30.12 | 0:3.6.1p2-33.30.12 |
openssh-clientsRed Hat:enterprise_linux:3::desktop From an advisory covering 2 CVEs |
before 0:3.6.1p2-33.30.12 | 0:3.6.1p2-33.30.12 |
openssh-debuginfoRed Hat:enterprise_linux:3::desktop From an advisory covering 2 CVEs |
before 0:3.6.1p2-33.30.12 | 0:3.6.1p2-33.30.12 |
openssh-serverRed Hat:enterprise_linux:3::desktop From an advisory covering 2 CVEs |
before 0:3.6.1p2-33.30.12 | 0:3.6.1p2-33.30.12 |
opensshRed Hat:enterprise_linux:3::es From an advisory covering 2 CVEs |
before 0:3.6.1p2-33.30.12 | 0:3.6.1p2-33.30.12 |
openssh-askpassRed Hat:enterprise_linux:3::es From an advisory covering 2 CVEs |
before 0:3.6.1p2-33.30.12 | 0:3.6.1p2-33.30.12 |
openssh-askpass-gnomeRed Hat:enterprise_linux:3::es From an advisory covering 2 CVEs |
before 0:3.6.1p2-33.30.12 | 0:3.6.1p2-33.30.12 |
openssh-clientsRed Hat:enterprise_linux:3::es From an advisory covering 2 CVEs |
before 0:3.6.1p2-33.30.12 | 0:3.6.1p2-33.30.12 |
openssh-debuginfoRed Hat:enterprise_linux:3::es From an advisory covering 2 CVEs |
before 0:3.6.1p2-33.30.12 | 0:3.6.1p2-33.30.12 |
openssh-serverRed Hat:enterprise_linux:3::es From an advisory covering 2 CVEs |
before 0:3.6.1p2-33.30.12 | 0:3.6.1p2-33.30.12 |
opensshRed Hat:enterprise_linux:3::ws From an advisory covering 2 CVEs |
before 0:3.6.1p2-33.30.12 | 0:3.6.1p2-33.30.12 |
openssh-askpassRed Hat:enterprise_linux:3::ws From an advisory covering 2 CVEs |
before 0:3.6.1p2-33.30.12 | 0:3.6.1p2-33.30.12 |
openssh-askpass-gnomeRed Hat:enterprise_linux:3::ws From an advisory covering 2 CVEs |
before 0:3.6.1p2-33.30.12 | 0:3.6.1p2-33.30.12 |
openssh-clientsRed Hat:enterprise_linux:3::ws From an advisory covering 2 CVEs |
before 0:3.6.1p2-33.30.12 | 0:3.6.1p2-33.30.12 |
openssh-debuginfoRed Hat:enterprise_linux:3::ws From an advisory covering 2 CVEs |
before 0:3.6.1p2-33.30.12 | 0:3.6.1p2-33.30.12 |
openssh-serverRed Hat:enterprise_linux:3::ws From an advisory covering 2 CVEs |
before 0:3.6.1p2-33.30.12 | 0:3.6.1p2-33.30.12 |
opensshRed Hat:enterprise_linux:4::as From an advisory covering 2 CVEs |
before 0:3.9p1-8.RHEL4.17 | 0:3.9p1-8.RHEL4.17 |
openssh-askpassRed Hat:enterprise_linux:4::as From an advisory covering 2 CVEs |
before 0:3.9p1-8.RHEL4.17 | 0:3.9p1-8.RHEL4.17 |
openssh-askpass-gnomeRed Hat:enterprise_linux:4::as From an advisory covering 2 CVEs |
before 0:3.9p1-8.RHEL4.17 | 0:3.9p1-8.RHEL4.17 |
openssh-clientsRed Hat:enterprise_linux:4::as From an advisory covering 2 CVEs |
before 0:3.9p1-8.RHEL4.17 | 0:3.9p1-8.RHEL4.17 |
openssh-debuginfoRed Hat:enterprise_linux:4::as From an advisory covering 2 CVEs |
before 0:3.9p1-8.RHEL4.17 | 0:3.9p1-8.RHEL4.17 |
openssh-serverRed Hat:enterprise_linux:4::as From an advisory covering 2 CVEs |
before 0:3.9p1-8.RHEL4.17 | 0:3.9p1-8.RHEL4.17 |
opensshRed Hat:enterprise_linux:4::desktop From an advisory covering 2 CVEs |
before 0:3.9p1-8.RHEL4.17 | 0:3.9p1-8.RHEL4.17 |
openssh-askpassRed Hat:enterprise_linux:4::desktop From an advisory covering 2 CVEs |
before 0:3.9p1-8.RHEL4.17 | 0:3.9p1-8.RHEL4.17 |
openssh-askpass-gnomeRed Hat:enterprise_linux:4::desktop From an advisory covering 2 CVEs |
before 0:3.9p1-8.RHEL4.17 | 0:3.9p1-8.RHEL4.17 |
openssh-clientsRed Hat:enterprise_linux:4::desktop From an advisory covering 2 CVEs |
before 0:3.9p1-8.RHEL4.17 | 0:3.9p1-8.RHEL4.17 |
openssh-debuginfoRed Hat:enterprise_linux:4::desktop From an advisory covering 2 CVEs |
before 0:3.9p1-8.RHEL4.17 | 0:3.9p1-8.RHEL4.17 |
openssh-serverRed Hat:enterprise_linux:4::desktop From an advisory covering 2 CVEs |
before 0:3.9p1-8.RHEL4.17 | 0:3.9p1-8.RHEL4.17 |
opensshRed Hat:enterprise_linux:4::es From an advisory covering 2 CVEs |
before 0:3.9p1-8.RHEL4.17 | 0:3.9p1-8.RHEL4.17 |
openssh-askpassRed Hat:enterprise_linux:4::es From an advisory covering 2 CVEs |
before 0:3.9p1-8.RHEL4.17 | 0:3.9p1-8.RHEL4.17 |
openssh-askpass-gnomeRed Hat:enterprise_linux:4::es From an advisory covering 2 CVEs |
before 0:3.9p1-8.RHEL4.17 | 0:3.9p1-8.RHEL4.17 |
openssh-clientsRed Hat:enterprise_linux:4::es From an advisory covering 2 CVEs |
before 0:3.9p1-8.RHEL4.17 | 0:3.9p1-8.RHEL4.17 |
openssh-debuginfoRed Hat:enterprise_linux:4::es From an advisory covering 2 CVEs |
before 0:3.9p1-8.RHEL4.17 | 0:3.9p1-8.RHEL4.17 |
openssh-serverRed Hat:enterprise_linux:4::es From an advisory covering 2 CVEs |
before 0:3.9p1-8.RHEL4.17 | 0:3.9p1-8.RHEL4.17 |
opensshRed Hat:enterprise_linux:4::ws From an advisory covering 2 CVEs |
before 0:3.9p1-8.RHEL4.17 | 0:3.9p1-8.RHEL4.17 |
openssh-askpassRed Hat:enterprise_linux:4::ws From an advisory covering 2 CVEs |
before 0:3.9p1-8.RHEL4.17 | 0:3.9p1-8.RHEL4.17 |
openssh-askpass-gnomeRed Hat:enterprise_linux:4::ws From an advisory covering 2 CVEs |
before 0:3.9p1-8.RHEL4.17 | 0:3.9p1-8.RHEL4.17 |
openssh-clientsRed Hat:enterprise_linux:4::ws From an advisory covering 2 CVEs |
before 0:3.9p1-8.RHEL4.17 | 0:3.9p1-8.RHEL4.17 |
openssh-debuginfoRed Hat:enterprise_linux:4::ws From an advisory covering 2 CVEs |
before 0:3.9p1-8.RHEL4.17 | 0:3.9p1-8.RHEL4.17 |
openssh-serverRed Hat:enterprise_linux:4::ws From an advisory covering 2 CVEs |
before 0:3.9p1-8.RHEL4.17 | 0:3.9p1-8.RHEL4.17 |
opensshRed Hat:enterprise_linux:2.1::as From an advisory covering 4 CVEs |
before 0:3.1p1-21 | 0:3.1p1-21 |
openssh-askpassRed Hat:enterprise_linux:2.1::as From an advisory covering 4 CVEs |
before 0:3.1p1-21 | 0:3.1p1-21 |
openssh-askpass-gnomeRed Hat:enterprise_linux:2.1::as From an advisory covering 4 CVEs |
before 0:3.1p1-21 | 0:3.1p1-21 |
openssh-clientsRed Hat:enterprise_linux:2.1::as From an advisory covering 4 CVEs |
before 0:3.1p1-21 | 0:3.1p1-21 |
openssh-serverRed Hat:enterprise_linux:2.1::as From an advisory covering 4 CVEs |
before 0:3.1p1-21 | 0:3.1p1-21 |
opensshRed Hat:enterprise_linux:2.1::aw From an advisory covering 4 CVEs |
before 0:3.1p1-21 | 0:3.1p1-21 |
openssh-askpassRed Hat:enterprise_linux:2.1::aw From an advisory covering 4 CVEs |
before 0:3.1p1-21 | 0:3.1p1-21 |
openssh-askpass-gnomeRed Hat:enterprise_linux:2.1::aw From an advisory covering 4 CVEs |
before 0:3.1p1-21 | 0:3.1p1-21 |
openssh-clientsRed Hat:enterprise_linux:2.1::aw From an advisory covering 4 CVEs |
before 0:3.1p1-21 | 0:3.1p1-21 |
openssh-serverRed Hat:enterprise_linux:2.1::aw From an advisory covering 4 CVEs |
before 0:3.1p1-21 | 0:3.1p1-21 |
opensshRed Hat:enterprise_linux:2.1::es From an advisory covering 4 CVEs |
before 0:3.1p1-21 | 0:3.1p1-21 |
openssh-askpassRed Hat:enterprise_linux:2.1::es From an advisory covering 4 CVEs |
before 0:3.1p1-21 | 0:3.1p1-21 |
openssh-askpass-gnomeRed Hat:enterprise_linux:2.1::es From an advisory covering 4 CVEs |
before 0:3.1p1-21 | 0:3.1p1-21 |
openssh-clientsRed Hat:enterprise_linux:2.1::es From an advisory covering 4 CVEs |
before 0:3.1p1-21 | 0:3.1p1-21 |
openssh-serverRed Hat:enterprise_linux:2.1::es From an advisory covering 4 CVEs |
before 0:3.1p1-21 | 0:3.1p1-21 |
opensshRed Hat:enterprise_linux:2.1::ws From an advisory covering 4 CVEs |
before 0:3.1p1-21 | 0:3.1p1-21 |
openssh-askpassRed Hat:enterprise_linux:2.1::ws From an advisory covering 4 CVEs |
before 0:3.1p1-21 | 0:3.1p1-21 |
openssh-askpass-gnomeRed Hat:enterprise_linux:2.1::ws From an advisory covering 4 CVEs |
before 0:3.1p1-21 | 0:3.1p1-21 |
openssh-clientsRed Hat:enterprise_linux:2.1::ws From an advisory covering 4 CVEs |
before 0:3.1p1-21 | 0:3.1p1-21 |
openssh-serverRed Hat:enterprise_linux:2.1::ws From an advisory covering 4 CVEs |
before 0:3.1p1-21 | 0:3.1p1-21 |
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| Exploit-DB | OpenSSH 4.3 p1 - Duplicated Block Remote Denial of Service | 2006-09-27 |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| affected | ||
| aliases | EUVD | |
| first indexed | CVE List, Exploit-DB, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2006-4924 is a high vulnerability (CVSS 7.8) in Openbsd Openssh, published September 27, 2006. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 38.1%, the 98th percentile. Fixed in openssh 1:4.3p2-4.
References
security.freebsd.org/advisories/FreeBSD-SA-06%3A22.openssh.asc
sourceforge.net/forum/forum.php?forum_id=681763
blogs.sun.com/security/entry/sun_alert_102962_security_vulnerability
secunia.com/advisories/22270
itrc.hp.com/service/cki/docDisplay.do?docId=c00815112
Show 98 moreShow less
ubuntu.com/usn/usn-355-1
trustix.org/errata/2006/0054
vmware.com/support/vi3/doc/esx-3069097-patch.html
vupen.com/english/advisories/2006/4401
openbsd.org/errata.html
novell.com/linux/security/advisories/2006_24_sr.html
us-cert.gov/cas/techalerts/TA07-072A.html
security.gentoo.org/glsa/glsa-200611-06.xml
support.avaya.com/elmodocs2/security/ASA-2006-262.htm
bugs.gentoo.org/show_bug.cgi?id=148228
sunsolve.sun.com/search/document.do?assetkey=1-26-102962-1
lists.apple.com/archives/security-announce/2007/Mar/msg00002.html
kb.cert.org/vuls/id/787448
docs.info.apple.com/article.html?artnum=305214
securitytracker.com/id?1016931
oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A1193
bugzilla.redhat.com/bugzilla/show_bug.cgi?id=207955
securityfocus.com/bid/20216
slackware.com/security/viewer.php?l=slackware-security&y=2006&m=slackware-security.592566
redhat.com/support/errata/RHSA-2006-0697.html
hypersonic.bluecoat.com/support/securityadvisories/ssh_server_on_sg
openpkg.org/security/advisories/OpenPKG-SA-2006.022-openssh.html
exchange.xforce.ibmcloud.com/vulnerabilities/29158
marc.info?l=openssh-unix-dev&m=115939141729160&w=2
www-unix.globus.org/mail_archive/security-announce/2007/04/msg00000.html
issues.rpath.com/browse/RPL-661
debian.org/security/2006/dsa-1212
osvdb.org/29152
mandriva.com/security/advisories?name=MDKSA-2006:179
nvd.nist.gov/vuln/detail/CVE-2006-4924
github.com/advisories/GHSA-8x5c-jhv9-65x6
security-tracker.debian.org/tracker/CVE-2006-4924
access.redhat.com/errata/RHSA-2006:0697
security.access.redhat.com/data/csaf/v2/advisories/2006/rhsa-2006_0697.json
cve.org/CVERecord?id=CVE-2006-4924