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CVE-2015-3405

Published: Aug 9, 2017Updated: May 13, 2026 Sources: CVE List NVDCWE-331
NVD MITRE
7.5CVSSHIGH
EPSS Score
5.3%
Top 8.5%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

ntp-keygen in ntp 4.2.8px before 4.2.8p2-RC2 and 4.3.x before 4.3.12 does not generate MD5 keys with sufficient entropy on big endian machines when the lowest order byte of the temp variable is between 0x20 and 0x7f and not #, which might allow remote attackers to obtain the value of generated MD5 keys via a brute force attack with the 93 possible keys.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:NA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:NIntegrity
None
A:NAvailability
None
Open in CVSS calculator →

Weaknesses

CWE-331

Affected Products

ntpntp
On-prem
Networking Infrastructure / dns-dhcp-ntp
debian linuxdebian
On-premOS
Operating Systems / linux-distro
suse linux enterprise serveropensuse
On-prem
Operating Systems / linux-distro
suse linux enterprise desktopopensuse project
On-prem
Operating Systems / linux-distro
suse linux enterprise serversuse
On-premOS
Operating Systems / linux-distro
ntposs-projectNetworking Infrastructureaka ntp daemon
debianoss-projectGBOperating Systemsaka debian gnu/linux
opensuseoss-projectDEOperating Systemsaka opensuse
opensuse projectoss-projectDEOperating Systemsaka opensuse, opensuse
susecommercialDEOperating Systems
and 9 more affected products View all →

Exploitability

Official Patch Available

References

http://bk1.ntp.org/ntp-stable/?PAGE=patch&REV=55199296N2gFqH1Hm5GOnhrk9Ypygg
bk1.ntp.org
http://lists.fedoraproject.org/pipermail/package-announce/2015-April/156248.html
lists.fedoraproject.org
http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00000.html
lists.opensuse.org
and 11 more references View all →

Timeline

Published
Aug 9, 2017
Last Updated
May 13, 2026

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