7.5high
CVE-2016-8858in critical feed
The kex_input_kexinit function in kex.c in OpenSSH 6.x and 7.x through 7.3 allows remote attackers to cause a denial of service (memory con…
Published 9 y ago · modified 4 mo ago · JSON
CVSS
7.5
v3.1 · CNA
CISA KEV
No
not known exploited
EPSS
29.5%
percentile 98%
Public exploits
0
none known
Summary
The kex_input_kexinit function in kex.c in OpenSSH 6.x and 7.x through 7.3 allows remote attackers to cause a denial of service (memory consumption) by sending many duplicate KEXINIT requests. NOTE: a third party reports that "OpenSSH upstream does not consider this as a security issue."
CISA SSVC assessment
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 2 y ago
Exploit prediction (EPSS)
29.46% probability of exploitation in the next 30 days, higher than 98% of all scored CVEs.
CVSS scores
| Assigned by | Version | Score | Vector |
|---|---|---|---|
| CISA ADP | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| CNA | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVD | 3.0 | 7.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVD | 2.0 | 7.8 | AV:N/AC:L/Au:N/C:N/I:N/A:C |
Classification
References
- securityfocus.com /bid/93776 · vdb-entry, x_transferred
- openwall.com /lists/oss-security/2016/10/20/1 · mailing-list, x_transferred
- security.netapp.com /advisory/ntap-20180201-0001/ · x_transferred
- openwall.com /lists/oss-security/2016/10/19/3 · mailing-list, x_transferred
- cvsweb.openbsd.org /cgi-bin/cvsweb/src/usr.bin/ssh/kex.c.diff?r1=1.126&r2=1.127&f=h · x_transferred
- github.com /openssh/openssh-portable/commit/ec165c392ca54317dbe3064a8c200de6531e89ad · x_transferred
- ftp.openbsd.org /pub/OpenBSD/patches/6.0/common/013_ssh_kexinit.patch.sig · x_transferred
- security.freebsd.org /advisories/FreeBSD-SA-16:33.openssh.asc · vendor-advisory, x_transferred
- securitytracker.com /id/1037057 · vdb-entry, x_transferred
- security.gentoo.org /glsa/201612-18 · vendor-advisory, x_transferred
- bugzilla.redhat.com /show_bug.cgi?id=1384860 · x_transferred
- cvsweb.openbsd.org /cgi-bin/cvsweb/src/usr.bin/ssh/kex.c?rev=1.127&content-type=text/x-cvsweb-markup · x_transferred
- cert-portal.siemens.com /productcert/pdf/ssa-412672.pdf · x_transferred
Sources
- CVE List: CVE-2016-8858
- NVD: CVE-2016-8858
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