CVE-2015-3405
"Cryptoatlantic: NTP ntp-keygen MD5 Key Predictability Vulnerability"
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.
INFO
Published Date :
Aug. 9, 2017, 4:29 p.m.
Last Modified :
Feb. 13, 2023, 12:49 a.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
3.6
Exploitability Score :
3.9
Affected Products
The following products are affected by CVE-2015-3405
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2015-3405.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2015-3405 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2015-3405 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
Feb. 13, 2023
Action Type Old Value New Value Changed Description A flaw was found in the way the ntp-keygen utility generated MD5 symmetric keys on big-endian systems. An attacker could possibly use this flaw to guess generated MD5 keys, which could then be used to spoof an NTP client or server. 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. Removed CVSS V2 Metadata Access Complexity Insufficient Information Removed CVSS V2 Red Hat, Inc. (AV:N/AC:H/Au:N/C:P/I:P/A:N) Removed Reference https://access.redhat.com/errata/RHSA-2015:1459 [No Types Assigned] Removed Reference https://access.redhat.com/errata/RHSA-2015:2231 [No Types Assigned] Removed Reference https://access.redhat.com/security/cve/CVE-2015-3405 [No Types Assigned] -
CVE Modified by [email protected]
Feb. 02, 2023
Action Type Old Value New Value Changed 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. A flaw was found in the way the ntp-keygen utility generated MD5 symmetric keys on big-endian systems. An attacker could possibly use this flaw to guess generated MD5 keys, which could then be used to spoof an NTP client or server. Added CVSS V2 Red Hat, Inc. (AV:N/AC:H/Au:N/C:P/I:P/A:N) Added Reference https://access.redhat.com/errata/RHSA-2015:1459 [No Types Assigned] Added Reference https://access.redhat.com/errata/RHSA-2015:2231 [No Types Assigned] Added Reference https://access.redhat.com/security/cve/CVE-2015-3405 [No Types Assigned] -
CPE Deprecation Remap by [email protected]
May. 28, 2020
Action Type Old Value New Value Changed CPE Configuration OR *cpe:2.3:a:ntp:ntp:4.2.8:p2_rc1:*:*:*:*:*:* OR *cpe:2.3:a:ntp:ntp:4.2.8:p2-rc1:*:*:*:*:*:* -
CVE Modified by [email protected]
Aug. 28, 2018
Action Type Old Value New Value Added Reference https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03886en_us [No Types Assigned] -
CVE Modified by [email protected]
Jan. 30, 2018
Action Type Old Value New Value Added Reference http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html [No Types Assigned] Added Reference http://www.oracle.com/technetwork/topics/security/bulletinapr2015-2511959.html [No Types Assigned] -
Initial Analysis by [email protected]
Aug. 25, 2017
Action Type Old Value New Value Added CVSS V2 (AV:N/AC:L/Au:N/C:P/I:N/A:N) Added CVSS V3 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Changed Reference Type http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00000.html No Types Assigned http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00000.html Third Party Advisory Changed Reference Type http://rhn.redhat.com/errata/RHSA-2015-1459.html No Types Assigned http://rhn.redhat.com/errata/RHSA-2015-1459.html Third Party Advisory, VDB Entry Changed Reference Type http://www.debian.org/security/2015/dsa-3223 No Types Assigned http://www.debian.org/security/2015/dsa-3223 Third Party Advisory Changed Reference Type http://lists.fedoraproject.org/pipermail/package-announce/2015-April/156248.html No Types Assigned http://lists.fedoraproject.org/pipermail/package-announce/2015-April/156248.html Third Party Advisory Changed Reference Type https://bugzilla.redhat.com/show_bug.cgi?id=1210324 No Types Assigned https://bugzilla.redhat.com/show_bug.cgi?id=1210324 Issue Tracking, Patch, Third Party Advisory, VDB Entry Changed Reference Type https://bugs.ntp.org/show_bug.cgi?id=2797 No Types Assigned https://bugs.ntp.org/show_bug.cgi?id=2797 Issue Tracking, Third Party Advisory, Vendor Advisory Changed Reference Type http://bk1.ntp.org/ntp-stable/?PAGE=patch&REV=55199296N2gFqH1Hm5GOnhrk9Ypygg No Types Assigned http://bk1.ntp.org/ntp-stable/?PAGE=patch&REV=55199296N2gFqH1Hm5GOnhrk9Ypygg Third Party Advisory, Vendor Advisory Changed Reference Type http://www.debian.org/security/2015/dsa-3388 No Types Assigned http://www.debian.org/security/2015/dsa-3388 Third Party Advisory Changed Reference Type http://rhn.redhat.com/errata/RHSA-2015-2231.html No Types Assigned http://rhn.redhat.com/errata/RHSA-2015-2231.html Third Party Advisory, VDB Entry Changed Reference Type http://www.openwall.com/lists/oss-security/2015/04/23/14 No Types Assigned http://www.openwall.com/lists/oss-security/2015/04/23/14 Mailing List, Third Party Advisory Changed Reference Type http://www.securityfocus.com/bid/74045 No Types Assigned http://www.securityfocus.com/bid/74045 Third Party Advisory, VDB Entry Added CWE CWE-331 Added CPE Configuration OR *cpe:2.3:a:ntp:ntp:4.2.8:p1:*:*:*:*:*:* *cpe:2.3:a:ntp:ntp:4.2.8:p2:*:*:*:*:*:* *cpe:2.3:a:ntp:ntp:4.2.8:p2_rc1:*:*:*:*:*:* *cpe:2.3:a:ntp:ntp:4.3.0:*:*:*:*:*:*:* *cpe:2.3:a:ntp:ntp:4.3.1:*:*:*:*:*:*:* *cpe:2.3:a:ntp:ntp:4.3.2:*:*:*:*:*:*:* *cpe:2.3:a:ntp:ntp:4.3.3:*:*:*:*:*:*:* *cpe:2.3:a:ntp:ntp:4.3.4:*:*:*:*:*:*:* *cpe:2.3:a:ntp:ntp:4.3.5:*:*:*:*:*:*:* *cpe:2.3:a:ntp:ntp:4.3.6:*:*:*:*:*:*:* *cpe:2.3:a:ntp:ntp:4.3.7:*:*:*:*:*:*:* *cpe:2.3:a:ntp:ntp:4.3.8:*:*:*:*:*:*:* *cpe:2.3:a:ntp:ntp:4.3.9:*:*:*:*:*:*:* *cpe:2.3:a:ntp:ntp:4.3.10:*:*:*:*:*:*:* *cpe:2.3:a:ntp:ntp:4.3.11:*:*:*:*:*:*:* Added CPE Configuration OR *cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:* *cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* Added CPE Configuration OR *cpe:2.3:o:opensuse:suse_linux_enterprise_server:11.0:sp3:*:*:*:*:*:* *cpe:2.3:o:opensuse_project:suse_linux_enterprise_desktop:11.0:sp3:*:*:*:*:*:* *cpe:2.3:o:suse:suse_linux_enterprise_server:11.0:sp3:*:*:*:vmware:*:* Added CPE Configuration OR *cpe:2.3:o:fedoraproject:fedora:21:*:*:*:*:*:*:* Added CPE Configuration OR *cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems:6.0:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux_for_power_big_endian:6.0:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux_for_scientific_computing:6.0:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux_server_from_rhui_6:6.0:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Aug. 10, 2017
Action Type Old Value New Value Removed Reference http://bk1.ntp.org/ntp-stable/?PAGE=patch&REV=55199296N2gFqH1Hm5GOnhrk9Ypygg [No Types Assigned] Added Reference http://bk1.ntp.org/ntp-stable/?PAGE=patch&REV=55199296N2gFqH1Hm5GOnhrk9Ypygg [No Types Assigned]
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2015-3405 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2015-3405
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.30 }} -0.12%
score
0.65838
percentile