CVE-2015-7853

Description

The datalen parameter in the refclock driver in NTP 4.2.x before 4.2.8p4, and 4.3.x before 4.3.77 allows remote attackers to execute arbitrary code or cause a denial of service (crash) via a negative input value.

Category

9.8
CVSS
Severity: Critical
CVSS 3.1 •
CVSS 2.0 •
EPSS 19.03% Top 10%
Vendor Advisory opensuse.org Vendor Advisory ubuntu.com Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory gentoo.org Vendor Advisory cisco.com Vendor Advisory opensuse.org Vendor Advisory ntp.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://support.ntp.org/bin/view/Main/NtpBug2920 patch vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00026.html vendor advisory
http://www.ubuntu.com/usn/USN-2783-1 vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00020.html vendor advisory
http://www.securitytracker.com/id/1033951 vdb entry third party advisory
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00048.html vendor advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1274262 issue tracking vdb entry third party advisory
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00042.html vendor advisory
http://www.securityfocus.com/bid/77273 vdb entry third party advisory
http://lists.opensuse.org/opensuse-updates/2016-05/msg00114.html vendor advisory
https://security.gentoo.org/glsa/201607-15 vdb entry third party advisory vendor advisory
https://security.netapp.com/advisory/ntap-20171004-0001/ third party advisory
http://packetstormsecurity.com/files/134137/Slackware-Security-Advisory-ntp-Updates.html
http://packetstormsecurity.com/files/134082/FreeBSD-Security-Advisory-ntp-Authentication-Bypass.html
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20151021-ntp vendor advisory
https://bto.bluecoat.com/security-advisory/sa103
http://www.securityfocus.com/archive/1/536833/100/0/threaded mailing list
http://www.talosintel.com/vulnerability-reports/
http://lists.opensuse.org/opensuse-updates/2015-11/msg00093.html vendor advisory
http://www.securityfocus.com/archive/1/archive/1/536833/100/100/threaded mailing list
http://www.securityfocus.com/archive/1/536760/100/0/threaded mailing list
http://www.securityfocus.com/archive/1/archive/1/536760/100/100/threaded mailing list
http://www.securityfocus.com/archive/1/536796/100/0/threaded mailing list
http://www.securityfocus.com/archive/1/archive/1/536796/100/100/threaded mailing list
http://www.securityfocus.com/archive/1/536737/100/0/threaded mailing list
http://www.securityfocus.com/archive/1/archive/1/536737/100/100/threaded mailing list
https://cert-portal.siemens.com/productcert/pdf/ssa-211752.pdf
https://us-cert.cisa.gov/ics/advisories/icsa-21-159-11

Frequently Asked Questions

What is the severity of CVE-2015-7853?
CVE-2015-7853 has been scored as a critical severity vulnerability.
How to fix CVE-2015-7853?
To fix CVE-2015-7853, 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-2015-7853 being actively exploited in the wild?
It is possible that CVE-2015-7853 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~19% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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