CVE-2015-1798
NTP Symmetric-Key MAC Omission Vulnerability
Description
The symmetric-key feature in the receive function in ntp_proto.c in ntpd in NTP 4.x before 4.2.8p2 requires a correct MAC only if the MAC field has a nonzero length, which makes it easier for man-in-the-middle attackers to spoof packets by omitting the MAC.
INFO
Published Date :
April 8, 2015, 10:59 a.m.
Last Modified :
April 12, 2025, 10:46 a.m.
Source :
secalert@redhat.com
Remotely Exploitable :
No
Impact Score :
2.9
Exploitability Score :
3.2
Public PoC/Exploit Available at Github
CVE-2015-1798 has a 1 public PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
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-2015-1798.
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).
EPSS & VEDAS Score Aggregator for CVEs
cve vulnerability exploit epss vedas
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2015-1798 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2015-1798 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.
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CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference http://bugs.ntp.org/show_bug.cgi?id=2779 Added Reference http://lists.apple.com/archives/security-announce/2015/Jun/msg00002.html Added Reference http://lists.fedoraproject.org/pipermail/package-announce/2015-April/155863.html Added Reference http://lists.fedoraproject.org/pipermail/package-announce/2015-April/155864.html Added Reference http://lists.opensuse.org/opensuse-updates/2015-04/msg00052.html Added Reference http://marc.info/?l=bugtraq&m=143213867103400&w=2 Added Reference http://marc.info/?l=bugtraq&m=143213867103400&w=2 Added Reference http://rhn.redhat.com/errata/RHSA-2015-1459.html Added Reference http://support.apple.com/kb/HT204942 Added Reference http://support.ntp.org/bin/view/Main/SecurityNotice#Recent_Vulnerabilities Added Reference http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20150408-ntpd Added Reference http://tools.cisco.com/security/center/viewAlert.x?alertId=38276 Added Reference http://www.debian.org/security/2015/dsa-3223 Added Reference http://www.kb.cert.org/vuls/id/374268 Added Reference http://www.mandriva.com/security/advisories?name=MDVSA-2015:202 Added Reference http://www.oracle.com/technetwork/topics/security/bulletinapr2015-2511959.html Added Reference http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html Added Reference http://www.securityfocus.com/bid/73951 Added Reference http://www.securitytracker.com/id/1032032 Added Reference http://www.ubuntu.com/usn/USN-2567-1 Added Reference https://kc.mcafee.com/corporate/index?page=content&id=SB10114 Added Reference https://security.gentoo.org/glsa/201509-01 -
CVE Modified by secalert@redhat.com
May. 14, 2024
Action Type Old Value New Value -
CVE Modified by secalert@redhat.com
Feb. 12, 2023
Action Type Old Value New Value Changed Description It was found that ntpd did not check whether a Message Authentication Code (MAC) was present in a received packet when ntpd was configured to use symmetric cryptographic keys. A man-in-the-middle attacker could use this flaw to send crafted packets that would be accepted by a client or a peer without the attacker knowing the symmetric key. The symmetric-key feature in the receive function in ntp_proto.c in ntpd in NTP 4.x before 4.2.8p2 requires a correct MAC only if the MAC field has a nonzero length, which makes it easier for man-in-the-middle attackers to spoof packets by omitting the MAC. Removed CVSS V2 Metadata Victim must voluntarily interact with attack mechanism Removed CVSS V2 Red Hat, Inc. (AV:N/AC:H/Au:N/C:N/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-2015-1798 [No Types Assigned] Removed Reference https://bugzilla.redhat.com/show_bug.cgi?id=1199430 [No Types Assigned] -
CVE Modified by secalert@redhat.com
Feb. 02, 2023
Action Type Old Value New Value Changed Description The symmetric-key feature in the receive function in ntp_proto.c in ntpd in NTP 4.x before 4.2.8p2 requires a correct MAC only if the MAC field has a nonzero length, which makes it easier for man-in-the-middle attackers to spoof packets by omitting the MAC. It was found that ntpd did not check whether a Message Authentication Code (MAC) was present in a received packet when ntpd was configured to use symmetric cryptographic keys. A man-in-the-middle attacker could use this flaw to send crafted packets that would be accepted by a client or a peer without the attacker knowing the symmetric key. Added CVSS V2 Red Hat, Inc. (AV:N/AC:H/Au:N/C:N/I:P/A:N) Added Reference https://access.redhat.com/errata/RHSA-2015:1459 [No Types Assigned] Added Reference https://bugzilla.redhat.com/show_bug.cgi?id=1199430 [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-2015-1798 [No Types Assigned] -
CVE Modified by secalert@redhat.com
Jan. 05, 2018
Action Type Old Value New Value Added Reference http://rhn.redhat.com/errata/RHSA-2015-1459.html [No Types Assigned] -
CVE Modified by secalert@redhat.com
Jul. 01, 2017
Action Type Old Value New Value Added Reference https://security.gentoo.org/glsa/201509-01 [No Types Assigned] -
CVE Modified by secalert@redhat.com
Oct. 25, 2016
Action Type Old Value New Value Added Reference http://www.oracle.com/technetwork/topics/security/bulletinapr2015-2511959.html -
CVE Modified by secalert@redhat.com
Oct. 15, 2016
Action Type Old Value New Value Added Reference http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html -
CVE Modified by secalert@redhat.com
Aug. 23, 2016
Action Type Old Value New Value Added Reference http://marc.info/?l=bugtraq&m=143213867103400&w=2 -
CVE Modified by secalert@redhat.com
Jul. 06, 2015
Action Type Old Value New Value Added Reference http://lists.apple.com/archives/security-announce/2015/Jun/msg00002.html Added Reference http://support.apple.com/kb/HT204942 -
CVE Modified by secalert@redhat.com
May. 12, 2015
Action Type Old Value New Value Added Reference http://lists.fedoraproject.org/pipermail/package-announce/2015-April/155863.html Added Reference https://kc.mcafee.com/corporate/index?page=content&id=SB10114 Added Reference http://lists.opensuse.org/opensuse-updates/2015-04/msg00052.html Added Reference http://lists.fedoraproject.org/pipermail/package-announce/2015-April/155864.html -
CVE Modified by secalert@redhat.com
Apr. 23, 2015
Action Type Old Value New Value Added Reference http://www.securityfocus.com/bid/73951 Added Reference http://www.debian.org/security/2015/dsa-3223 Added Reference http://www.ubuntu.com/usn/USN-2567-1 -
CVE Modified by secalert@redhat.com
Apr. 15, 2015
Action Type Old Value New Value Added Reference http://www.mandriva.com/security/advisories?name=MDVSA-2015:202 -
CVE Modified by secalert@redhat.com
Apr. 14, 2015
Action Type Old Value New Value Added Reference http://tools.cisco.com/security/center/viewAlert.x?alertId=38276 Added Reference http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20150408-ntpd Added Reference http://www.securitytracker.com/id/1032032 -
Modified Analysis by nvd@nist.gov
Apr. 08, 2015
Action Type Old Value New Value Added CPE Configuration Configuration 1 OR *cpe:2.3:a:ntp:ntp:4.2.7p444:*:*:*:*:*:*:* (and previous) Added CVSS V2 (AV:A/AC:H/Au:N/C:N/I:P/A:N) Changed Reference Type http://www.kb.cert.org/vuls/id/374268 US Govt Resource http://www.kb.cert.org/vuls/id/374268 Advisory, US Govt Resource Changed Reference Type http://support.ntp.org/bin/view/Main/SecurityNotice#Recent_Vulnerabilities No Types Assigned http://support.ntp.org/bin/view/Main/SecurityNotice#Recent_Vulnerabilities Advisory Added CWE CWE-17 -
Initial Analysis by nvd@nist.gov
Apr. 08, 2015
Action Type Old Value New Value -
Initial Analysis by nvd@nist.gov
Apr. 08, 2015
Action Type Old Value New Value
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2015-1798 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-2015-1798
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.55 }} -0.67%
score
0.65437
percentile