CVE-2006-4924 EXPLOIT
7.8
HIGH · CVSS 2.0 · EPSS 37.5% (pctl 98)
Patch early
A public exploit exists.
Description
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.
Scoring
| CVSS | 7.8 (HIGH, v2.0) |
|---|---|
| Vector | AV:N/AC:L/Au:N/C:N/I:N/A:C |
| EPSS | 37.54% — more likely to be exploited than 98% of all CVEs |
| Weakness | CWE-399 |
| On CISA KEV | no |
| Public exploit | yes |
| Published | 2006-09-27 |
| Last modified | 2026-06-16 |
Affected (1)
| Vendor | Product |
|---|---|
| openbsd | openssh |
Public exploits
| Source | Title | Date |
|---|---|---|
| exploit-db | OpenSSH 4.3 p1 - Duplicated Block Remote Denial of Service | 2006-09-27 |
References
- ftp://ftp.freebsd.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-06:22.openssh.asc
- ftp://ftp.sco.com/pub/unixware7/714/security/p534336/p534336.txt
- ftp://patches.sgi.com/support/free/security/advisories/20061001-01-P.asc
- http://blogs.sun.com/security/entry/sun_alert_102962_security_vulnerability
- http://bugs.gentoo.org/show_bug.cgi?id=148228
- http://docs.info.apple.com/article.html?artnum=305214
- http://itrc.hp.com/service/cki/docDisplay.do?docId=c00815112
- http://lists.apple.com/archives/security-announce/2007/Mar/msg00002.html
- http://marc.info/?l=openssh-unix-dev&m=115939141729160&w=2
- http://secunia.com/advisories/21923
- http://secunia.com/advisories/22091
- http://secunia.com/advisories/22116
- http://secunia.com/advisories/22158
- http://secunia.com/advisories/22164
- http://secunia.com/advisories/22183
- http://secunia.com/advisories/22196
- http://secunia.com/advisories/22208
- http://secunia.com/advisories/22236
- http://secunia.com/advisories/22245
- http://secunia.com/advisories/22270
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