CVE-2015-1799

Description

The symmetric-key feature in the receive function in ntp_proto.c in ntpd in NTP 3.x and 4.x before 4.2.8p2 performs state-variable updates upon receiving certain invalid packets, which makes it easier for man-in-the-middle attackers to cause a denial of service (synchronization loss) by spoofing the source IP address of a peer.

Category

4.3
CVSS
Severity: Medium
CVSS 2.0 •
EPSS 0.68% Top 30%
Vendor Advisory debian.org Vendor Advisory cisco.com Vendor Advisory ubuntu.com Vendor Advisory marc.info Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory apple.com Vendor Advisory opensuse.org Vendor Advisory gentoo.org Vendor Advisory mandriva.com Vendor Advisory marc.info Vendor Advisory redhat.com Vendor Advisory cisco.com Vendor Advisory debian.org Vendor Advisory ntp.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://www.debian.org/security/2015/dsa-3222 vendor advisory
http://tools.cisco.com/security/center/viewAlert.x?alertId=38275 vendor advisory
http://listengine.tuxfamily.org/chrony.tuxfamily.org/chrony-announce/2015/04/msg00002.html mailing list
http://www.ubuntu.com/usn/USN-2567-1 vendor advisory
http://www.kb.cert.org/vuls/id/374268 third party advisory us government resource
http://www.securityfocus.com/bid/73950 vdb entry
http://marc.info/?l=bugtraq&m=143213867103400&w=2 vendor advisory
http://lists.fedoraproject.org/pipermail/package-announce/2015-April/155864.html vendor advisory
http://support.ntp.org/bin/view/Main/SecurityNotice#Recent_Vulnerabilities vendor advisory
https://kc.mcafee.com/corporate/index?page=content&id=SB10114
http://lists.fedoraproject.org/pipermail/package-announce/2015-April/155863.html vendor advisory
http://lists.apple.com/archives/security-announce/2015/Jun/msg00002.html vendor advisory
http://lists.opensuse.org/opensuse-updates/2015-04/msg00052.html vendor advisory
http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
https://security.gentoo.org/glsa/201509-01 vendor advisory
http://www.mandriva.com/security/advisories?name=MDVSA-2015:202 vendor advisory
http://www.oracle.com/technetwork/topics/security/bulletinapr2015-2511959.html
http://support.apple.com/kb/HT204942
http://marc.info/?l=bugtraq&m=145750740530849&w=2 vendor advisory
http://rhn.redhat.com/errata/RHSA-2015-1459.html vendor advisory
http://bugs.ntp.org/show_bug.cgi?id=2781
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20150408-ntpd vendor advisory
http://www.debian.org/security/2015/dsa-3223 vendor advisory
http://www.securitytracker.com/id/1032031 vdb entry

Frequently Asked Questions

What is the severity of CVE-2015-1799?
CVE-2015-1799 has been scored as a medium severity vulnerability.
How to fix CVE-2015-1799?
To fix CVE-2015-1799, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2015-1799 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2015-1799 is being actively exploited. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.