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CVE-2006-4924

47
FAUCET Score

CVE-2006-4924 describes a denial-of-service vulnerability in OpenSSH versions prior to 4.4, specifically when using the SSH version 1 protocol. Remote attackers can exploit this by sending SSH packets with duplicate blocks, leading to high CPU consumption due to improper handling by the CRC compensation attack detector. This vulnerability has a high CVSS score of 7.8, indicating a network-based attack with low complexity and a complete availability impact. While not actively exploited in the wild, public exploit code exists, and it has a high FAUCET Risk Score, despite minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
1.2CPE matchmatch criteria
cpe:2.3:a:openbsd:openssh:1.2:*:*:*:*:*:*:*
1.2.1CPE matchmatch criteria
cpe:2.3:a:openbsd:openssh:1.2.1:*:*:*:*:*:*:*
1.2.2CPE matchmatch criteria
cpe:2.3:a:openbsd:openssh:1.2.2:*:*:*:*:*:*:*
1.2.3CPE matchmatch criteria
cpe:2.3:a:openbsd:openssh:1.2.3:*:*:*:*:*:*:*
1.2.27CPE matchmatch criteria
cpe:2.3:a:openbsd:openssh:1.2.27:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

7.8HIGH

AV:N/AC:L/Au:N/C:N/I:N/A:C

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
6.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
34.67%
Probability of exploitation in next 30 days
EPSS Percentile
98.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
ExploitDB: EDB-2444 · Sep 27, 2006
This CVE's current EPSS score of 0.3467 is in the 97th percentile among its peer group of 51,553 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (5)

debianpatch availablevia nvd_reference
View patch
redhatpatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 2.1Fixed in: openssh-0:3.1p1-21
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 3Fixed in: openssh-0:3.6.1p2-33.30.12
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: openssh-0:3.9p1-8.RHEL4.17
View patch

Vendor Advisories (1)

redhatCVE-2006-4924Moderate

openssh DoS

Sep 19, 2006

References

ftp.freebsd.org / pub/FreeBSD/CERT/advisories/FreeBSD-SA-06:22.openssh.asc
ftp.sco.com / pub/unixware7/714/security/p534336/p534336.txt
patches.sgi.com / support/free/security/advisories/20061001-01-P.asc
blogs.sun.com / security/entry/sun_alert_102962_security_vulnerability
bugs.gentoo.org / show_bug.cgi
docs.info.apple.com / article.html
itrc.hp.com / service/cki/docDisplay.do
lists.apple.com / archives/security-announce/2007/Mar/msg00002.html
marc.info
bugzilla.redhat.com / bugzilla/show_bug.cgi
PatchVendor Advisory
secunia.com / advisories/21923
Vendor Advisory
secunia.com / advisories/22091
Vendor Advisory
secunia.com / advisories/22116
Vendor Advisory
secunia.com / advisories/22158
Vendor Advisory
secunia.com / advisories/22164
Vendor Advisory
secunia.com / advisories/22183
Vendor Advisory
secunia.com / advisories/22196
Vendor Advisory
secunia.com / advisories/22208
Vendor Advisory
secunia.com / advisories/22236
Vendor Advisory
secunia.com / advisories/22245
Vendor Advisory
secunia.com / advisories/22270
Vendor Advisory
secunia.com / advisories/22298
Vendor Advisory
secunia.com / advisories/22352
Vendor Advisory
secunia.com / advisories/22362
Vendor Advisory
secunia.com / advisories/22487
Vendor Advisory
secunia.com / advisories/22495
Vendor Advisory
secunia.com / advisories/22823
Vendor Advisory
secunia.com / advisories/22926
Vendor Advisory
secunia.com / advisories/23038
Vendor Advisory
secunia.com / advisories/23241
Vendor Advisory
secunia.com / advisories/23340
Vendor Advisory
secunia.com / advisories/23680
secunia.com / advisories/24479
secunia.com / advisories/24799
secunia.com / advisories/24805
secunia.com / advisories/25608
secunia.com / advisories/29371
secunia.com / advisories/34274
security.freebsd.org / advisories/FreeBSD-SA-06%3A22.openssh.asc
security.gentoo.org / glsa/glsa-200609-17.xml
security.gentoo.org / glsa/glsa-200611-06.xml
securitytracker.com / id
exchange.xforce.ibmcloud.com / vulnerabilities/29158
hypersonic.bluecoat.com / support/securityadvisories/ssh_server_on_sg
issues.rpath.com / browse/RPL-661
slackware.com / security/viewer.php
sourceforge.net / forum/forum.php
sourceforge.net / project/shownotes.php
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10462
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A1193
sunsolve.sun.com / search/document.do
support.avaya.com / elmodocs2/security/ASA-2006-216.htm
support.avaya.com / elmodocs2/security/ASA-2006-262.htm
debian.org / security/2006/dsa-1189
Patch
debian.org / security/2006/dsa-1212
Patch
kb.cert.org / vuls/id/787448
US Government Resource
mandriva.com / security/advisories
novell.com / linux/security/advisories/2006_24_sr.html
novell.com / linux/security/advisories/2006_62_openssh.html
openbsd.org / errata.html
openpkg.org / security/advisories/OpenPKG-SA-2006.022-openssh.html
osvdb.org / 29152
redhat.com / support/errata/RHSA-2006-0697.html
redhat.com / support/errata/RHSA-2006-0698.html
securityfocus.com / archive/1/447153/100/0/threaded
securityfocus.com / bid/20216
ExploitPatch
trustix.org / errata/2006/0054
ubuntu.com / usn/usn-355-1
www-unix.globus.org / mail_archive/security-announce/2007/04/msg00000.html
us-cert.gov / cas/techalerts/TA07-072A.html
US Government Resource
vmware.com / support/vi3/doc/esx-3069097-patch.html
vmware.com / support/vi3/doc/esx-9986131-patch.html
vupen.com / english/advisories/2006/3777
vupen.com / english/advisories/2006/4401
vupen.com / english/advisories/2006/4869
vupen.com / english/advisories/2007/0930
vupen.com / english/advisories/2007/1332
vupen.com / english/advisories/2007/2119
vupen.com / english/advisories/2009/0740