packet.c in ssh in OpenSSH allows remote attackers to cause a denial of service (crash) by sending an invalid protocol sequence with USERAUTH_SUCCESS before NEWKEYS, which causes newkeys[mode] to be NULL
Published Sep 29, 2006
5.0
MEDIUMCVSS 2.0
EPSS 15.16%
Description
packet.c in ssh in OpenSSH allows remote attackers to cause a denial of service (crash) by sending an invalid protocol sequence with USERAUTH_SUCCESS before NEWKEYS, which causes newkeys[mode] to be NULL.
Affected products
Remediation
Red Hat statement
Red Hat does not consider this flaw a security issue. This flaw can cause an OpenSSH client to crash when connecting to a malicious server, which does not result in a denial of service condition.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:N/AC:L/Au:N/C:N/I:N/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (21 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 15.16% (0.15156) | 96.65th | v5 (v2026.06.15) |
| Jun 15, 2026 | 14.64% (0.14641) | 96.21th | v5 (v2026.06.15) |
| Dec 28, 2025 | 3.37% (0.03372) | 86.99th | v4 (v2025.03.14) |
| Dec 27, 2025 | 9.16% (0.09163) | 92.45th | v4 (v2025.03.14) |
| Oct 28, 2025 | 3.37% (0.03372) | 86.84th | v4 (v2025.03.14) |
| Oct 27, 2025 | 9.16% (0.09163) | 92.34th | v4 (v2025.03.14) |
| Oct 1, 2025 | 2.99% (0.02987) | 86.08th | v4 (v2025.03.14) |
| Jul 30, 2025 | 6.00% (0.06003) | 90.32th | v4 (v2025.03.14) |
| Mar 30, 2025 | 2.68% (0.02683) | 84.53th | v4 (v2025.03.14) |
| Mar 29, 2025 | 3.77% (0.03771) | 79.86th | v4 (v2025.03.14) |
| Mar 17, 2025 | 2.68% (0.02683) | 84.85th | v4 (v2025.03.14) |
| Dec 17, 2024 | 4.44% (0.04440) | 92.32th | v3 (v2023.03.01) |
| Nov 24, 2023 | 6.16% (0.06155) | 92.79th | v3 (v2023.03.01) |
| Sep 9, 2023 | 4.99% (0.04989) | 91.85th | v3 (v2023.03.01) |
| Aug 2, 2023 | 9.19% (0.09186) | 93.84th | v3 (v2023.03.01) |
| Jun 25, 2023 | 10.39% (0.10388) | 94.15th | v3 (v2023.03.01) |
| May 18, 2023 | 10.91% (0.10911) | 94.24th | v3 (v2023.03.01) |
| Mar 7, 2023 | 9.86% (0.09855) | 93.85th | v3 (v2023.03.01) |
| Mar 6, 2023 | 3.78% (0.03779) | 85.48th | v2 (v2022.01.01) |
| Apr 1, 2022 | 3.78% (0.03779) | 84.01th | v2 (v2022.01.01) |
| Feb 4, 2022 | 3.78% (0.03779) | 67.21th | v2 (v2022.01.01) |
No CWE recorded.
References (17)
- http://bugs.gentoo.org/show_bug.cgi?id=148228 x_refsource_MISCExploitPatch
- http://secunia.com/advisories/22245 third-party-advisoryx_refsource_SECUNIA
- http://secunia.com/advisories/22298 third-party-advisoryx_refsource_SECUNIA
- http://secunia.com/advisories/22495 third-party-advisoryx_refsource_SECUNIA
- http://secunia.com/advisories/23038 third-party-advisoryx_refsource_SECUNIA
- http://www.mandriva.com/security/advisories?name=MDKSA-2006:179 vendor-advisoryx_refsource_MANDRIVA
- http://www.novell.com/linux/security/advisories/2006_24_sr.html vendor-advisoryx_refsource_SUSE
- http://www.novell.com/linux/security/advisories/2006_62_openssh.html vendor-advisoryx_refsource_SUSE
- http://www.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/packet.c.diff?r1=1.144&r2=1.145&f=h x_refsource_CONFIRM
- http://www.openpkg.org/security/advisories/OpenPKG-SA-2006.022-openssh.html vendor-advisoryx_refsource_OPENPKG
- http://www.securityfocus.com/archive/1/447153/100/0/threaded mailing-listx_refsource_BUGTRAQ
- http://www.securityfocus.com/archive/1/447861/100/200/threaded mailing-listx_refsource_BUGTRAQ
- https://access.redhat.com/security/cve/CVE-2006-4925 Vendor Advisory
- https://issues.rpath.com/browse/RPL-661 x_refsource_CONFIRM
- https://issues.rpath.com/browse/RPL-681 x_refsource_CONFIRM
- https://nvd.nist.gov/vuln/detail/CVE-2006-4925
- https://www.cve.org/CVERecord?id=CVE-2006-4925
Change history (0)
No recorded changes yet.