High severity · published Dec 9, 2016
CVE-2016-8858
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…
7.5
CVSS
29.5%
EPSS
No
On KEV
Description
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."
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)29.5% · higher than 98% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
OP
Openssh · Openbsd
6.8; 6.9; 7.0; 7.1; 7.2; 7.3 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2016-8858
CVE.org
https://www.cve.org/CVERecord?id=CVE-2016-8858
Issue Tracking
http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/kex.c.diff?r1=1.126&r2=1.127&f=h
Issue Tracking
http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/kex.c?rev=1.127&content-type=text/x-cvsweb-markup
Mailing List
http://www.openwall.com/lists/oss-security/2016/10/19/3
Mailing List
http://www.openwall.com/lists/oss-security/2016/10/20/1
Third Party Advisory
http://www.securityfocus.com/bid/93776
Third Party Advisory
http://www.securitytracker.com/id/1037057
More from Openssh
9.8
CVE-2023-38408
The PKCS#11 feature in ssh-agent in OpenSSH before 9.3p2 has an insufficiently trustworthy search path, leading to remote code execution if an agent is forwarded to an…
9.8
CVE-2023-28531
ssh-add in OpenSSH before 9.3 adds smartcard keys to ssh-agent without the intended per-hop destination constraints
9.8
CVE-2016-1908
The client in OpenSSH before 7.2 mishandles failed cookie generation for untrusted X11 forwarding and relies on the local X11 server for access-control decisions, which allows…
9.8
CVE-2010-4478
OpenSSH 5.6 and earlier, when J-PAKE is enabled, does not properly validate the public parameters in the J-PAKE protocol, which allows remote attackers to bypass the need for…
9.8
CVE-2002-0639
Integer overflow in sshd in OpenSSH 2.9.9 through 3.3 allows remote attackers to execute arbitrary code during challenge response authentication (ChallengeResponseAuthentication)…