7.5
HIGH
CVE-2015-5194
NTP Denial of Service Remote Crash
Description

The log_config_command function in ntp_parser.y in ntpd in NTP before 4.2.7p42 allows remote attackers to cause a denial of service (ntpd crash) via crafted logconfig commands.

INFO

Published Date :

July 21, 2017, 2:29 p.m.

Last Modified :

Nov. 21, 2024, 2:32 a.m.

Remotely Exploitable :

Yes !

Impact Score :

3.6

Exploitability Score :

3.9
Affected Products

The following products are affected by CVE-2015-5194 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.

ID Vendor Product Action
1 Suse linux_enterprise_server
2 Suse linux_enterprise_debuginfo
3 Suse openstack_cloud
4 Suse manager
5 Suse manager_proxy
1 Redhat enterprise_linux_desktop
2 Redhat enterprise_linux_server
3 Redhat enterprise_linux_workstation
4 Redhat enterprise_linux_hpc_node
1 Canonical ubuntu_linux
1 Fedoraproject fedora
1 Debian debian_linux
1 Ntp ntp
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-2015-5194.

URL Resource
http://bk1.ntp.org/ntp-dev/?PAGE=patch&REV=4c4fc141LwvcoGp-lLGhkAFp3ZvtrA Issue Tracking Patch Vendor Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2015-November/170926.html Third Party Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2015-October/169167.html Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00048.html Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00026.html Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00042.html Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2016-0780.html Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2016-2583.html Third Party Advisory
http://www.debian.org/security/2015/dsa-3388 Third Party Advisory
http://www.openwall.com/lists/oss-security/2015/08/25/3 Mailing List Patch Third Party Advisory
http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
http://www.securityfocus.com/bid/76475 Third Party Advisory VDB Entry
http://www.ubuntu.com/usn/USN-2783-1 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1254542 Issue Tracking Patch
https://github.com/ntp-project/ntp/commit/553f2fa65865c31c5e3c48812cfd46176cffdd27 Issue Tracking Patch Third Party Advisory
https://www-01.ibm.com/support/docview.wss?uid=isg3T1024157 Third Party Advisory
https://www-01.ibm.com/support/docview.wss?uid=swg21985122 Third Party Advisory
https://www-01.ibm.com/support/docview.wss?uid=swg21986956 Third Party Advisory
https://www-01.ibm.com/support/docview.wss?uid=swg21988706 Third Party Advisory
https://www-01.ibm.com/support/docview.wss?uid=swg21989542 Third Party Advisory
http://bk1.ntp.org/ntp-dev/?PAGE=patch&REV=4c4fc141LwvcoGp-lLGhkAFp3ZvtrA Issue Tracking Patch Vendor Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2015-November/170926.html Third Party Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2015-October/169167.html Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00048.html Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00026.html Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00042.html Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2016-0780.html Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2016-2583.html Third Party Advisory
http://www.debian.org/security/2015/dsa-3388 Third Party Advisory
http://www.openwall.com/lists/oss-security/2015/08/25/3 Mailing List Patch Third Party Advisory
http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
http://www.securityfocus.com/bid/76475 Third Party Advisory VDB Entry
http://www.ubuntu.com/usn/USN-2783-1 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1254542 Issue Tracking Patch
https://github.com/ntp-project/ntp/commit/553f2fa65865c31c5e3c48812cfd46176cffdd27 Issue Tracking Patch Third Party Advisory
https://www-01.ibm.com/support/docview.wss?uid=isg3T1024157 Third Party Advisory
https://www-01.ibm.com/support/docview.wss?uid=swg21985122 Third Party Advisory
https://www-01.ibm.com/support/docview.wss?uid=swg21986956 Third Party Advisory
https://www-01.ibm.com/support/docview.wss?uid=swg21988706 Third Party Advisory
https://www-01.ibm.com/support/docview.wss?uid=swg21989542 Third Party Advisory

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-2015-5194 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2015-5194 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 af854a3a-2127-422b-91ae-364da2661108

    Nov. 21, 2024

    Action Type Old Value New Value
    Added Reference http://bk1.ntp.org/ntp-dev/?PAGE=patch&REV=4c4fc141LwvcoGp-lLGhkAFp3ZvtrA
    Added Reference http://lists.fedoraproject.org/pipermail/package-announce/2015-November/170926.html
    Added Reference http://lists.fedoraproject.org/pipermail/package-announce/2015-October/169167.html
    Added Reference http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00048.html
    Added Reference http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00026.html
    Added Reference http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00042.html
    Added Reference http://rhn.redhat.com/errata/RHSA-2016-0780.html
    Added Reference http://rhn.redhat.com/errata/RHSA-2016-2583.html
    Added Reference http://www.debian.org/security/2015/dsa-3388
    Added Reference http://www.openwall.com/lists/oss-security/2015/08/25/3
    Added Reference http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
    Added Reference http://www.securityfocus.com/bid/76475
    Added Reference http://www.ubuntu.com/usn/USN-2783-1
    Added Reference https://bugzilla.redhat.com/show_bug.cgi?id=1254542
    Added Reference https://github.com/ntp-project/ntp/commit/553f2fa65865c31c5e3c48812cfd46176cffdd27
    Added Reference https://www-01.ibm.com/support/docview.wss?uid=isg3T1024157
    Added Reference https://www-01.ibm.com/support/docview.wss?uid=swg21985122
    Added Reference https://www-01.ibm.com/support/docview.wss?uid=swg21986956
    Added Reference https://www-01.ibm.com/support/docview.wss?uid=swg21988706
    Added Reference https://www-01.ibm.com/support/docview.wss?uid=swg21989542
  • 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 It was found that ntpd could crash due to an uninitialized variable when processing malformed logconfig configuration commands. The log_config_command function in ntp_parser.y in ntpd in NTP before 4.2.7p42 allows remote attackers to cause a denial of service (ntpd crash) via crafted logconfig commands.
    Removed CVSS V2 Red Hat, Inc. (AV:N/AC:L/Au:S/C:N/I:P/A:N)
    Removed Reference https://access.redhat.com/errata/RHSA-2016:0780 [No Types Assigned]
    Removed Reference https://access.redhat.com/errata/RHSA-2016:2583 [No Types Assigned]
    Removed Reference https://access.redhat.com/security/cve/CVE-2015-5194 [No Types Assigned]
  • CVE Modified by [email protected]

    Feb. 02, 2023

    Action Type Old Value New Value
    Changed Description The log_config_command function in ntp_parser.y in ntpd in NTP before 4.2.7p42 allows remote attackers to cause a denial of service (ntpd crash) via crafted logconfig commands. It was found that ntpd could crash due to an uninitialized variable when processing malformed logconfig configuration commands.
    Added CVSS V2 Red Hat, Inc. (AV:N/AC:L/Au:S/C:N/I:P/A:N)
    Added Reference https://access.redhat.com/errata/RHSA-2016:2583 [No Types Assigned]
    Added Reference https://access.redhat.com/errata/RHSA-2016:0780 [No Types Assigned]
    Added Reference https://access.redhat.com/security/cve/CVE-2015-5194 [No Types Assigned]
  • CVE Modified by [email protected]

    May. 18, 2018

    Action Type Old Value New Value
    Added Reference http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html [No Types Assigned]
  • Initial Analysis by [email protected]

    Jul. 27, 2017

    Action Type Old Value New Value
    Added CVSS V2 (AV:N/AC:L/Au:N/C:N/I:N/A:P)
    Added CVSS V3 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    Changed Reference Type http://www.securityfocus.com/bid/76475 No Types Assigned http://www.securityfocus.com/bid/76475 Third Party Advisory, VDB Entry
    Changed Reference Type http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00026.html No Types Assigned http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00026.html Third Party Advisory
    Changed Reference Type https://github.com/ntp-project/ntp/commit/553f2fa65865c31c5e3c48812cfd46176cffdd27 No Types Assigned https://github.com/ntp-project/ntp/commit/553f2fa65865c31c5e3c48812cfd46176cffdd27 Issue Tracking, Patch, Third Party Advisory
    Changed Reference Type http://lists.fedoraproject.org/pipermail/package-announce/2015-November/170926.html No Types Assigned http://lists.fedoraproject.org/pipermail/package-announce/2015-November/170926.html Third Party Advisory
    Changed Reference Type http://www.openwall.com/lists/oss-security/2015/08/25/3 No Types Assigned http://www.openwall.com/lists/oss-security/2015/08/25/3 Mailing List, Patch, Third Party Advisory
    Changed Reference Type http://www.ubuntu.com/usn/USN-2783-1 No Types Assigned http://www.ubuntu.com/usn/USN-2783-1 Third Party Advisory
    Changed Reference Type https://www-01.ibm.com/support/docview.wss?uid=swg21988706 No Types Assigned https://www-01.ibm.com/support/docview.wss?uid=swg21988706 Third Party Advisory
    Changed Reference Type http://bk1.ntp.org/ntp-dev/?PAGE=patch&REV=4c4fc141LwvcoGp-lLGhkAFp3ZvtrA No Types Assigned http://bk1.ntp.org/ntp-dev/?PAGE=patch&REV=4c4fc141LwvcoGp-lLGhkAFp3ZvtrA Issue Tracking, Patch, 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 https://www-01.ibm.com/support/docview.wss?uid=swg21989542 No Types Assigned https://www-01.ibm.com/support/docview.wss?uid=swg21989542 Third Party Advisory
    Changed Reference Type http://rhn.redhat.com/errata/RHSA-2016-2583.html No Types Assigned http://rhn.redhat.com/errata/RHSA-2016-2583.html Third Party Advisory
    Changed Reference Type https://www-01.ibm.com/support/docview.wss?uid=swg21986956 No Types Assigned https://www-01.ibm.com/support/docview.wss?uid=swg21986956 Third Party Advisory
    Changed Reference Type http://rhn.redhat.com/errata/RHSA-2016-0780.html No Types Assigned http://rhn.redhat.com/errata/RHSA-2016-0780.html Third Party Advisory
    Changed Reference Type http://lists.fedoraproject.org/pipermail/package-announce/2015-October/169167.html No Types Assigned http://lists.fedoraproject.org/pipermail/package-announce/2015-October/169167.html Third Party Advisory
    Changed Reference Type http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00042.html No Types Assigned http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00042.html Third Party Advisory
    Changed Reference Type https://www-01.ibm.com/support/docview.wss?uid=swg21985122 No Types Assigned https://www-01.ibm.com/support/docview.wss?uid=swg21985122 Third Party Advisory
    Changed Reference Type https://bugzilla.redhat.com/show_bug.cgi?id=1254542 No Types Assigned https://bugzilla.redhat.com/show_bug.cgi?id=1254542 Issue Tracking, Patch
    Changed Reference Type http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00048.html No Types Assigned http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00048.html Third Party Advisory
    Changed Reference Type https://www-01.ibm.com/support/docview.wss?uid=isg3T1024157 No Types Assigned https://www-01.ibm.com/support/docview.wss?uid=isg3T1024157 Third Party Advisory
    Added CWE CWE-20
    Added CPE Configuration OR *cpe:2.3:o:fedoraproject:fedora:21:*:*:*:*:*:*:* *cpe:2.3:o:fedoraproject:fedora:22:*:*:*:*:*:*:*
    Added CPE Configuration OR *cpe:2.3:a:suse:linux_enterprise_debuginfo:11:sp2:*:*:*:*:*:* *cpe:2.3:a:suse:linux_enterprise_debuginfo:11:sp3:*:*:*:*:*:* *cpe:2.3:o:suse:linux_enterprise_server:10:sp4:*:*:ltss:*:*:* *cpe:2.3:o:suse:linux_enterprise_server:11:sp2:*:*:ltss:*:*:* *cpe:2.3:o:suse:linux_enterprise_server:11:sp3:*:*:ltss:*:*:* *cpe:2.3:o:suse:manager:2.1:*:*:*:*:*:*:* *cpe:2.3:o:suse:manager_proxy:2.1:*:*:*:*:*:*:* *cpe:2.3:o:suse:openstack_cloud:5:*:*:*:*:*:*:*
    Added CPE Configuration OR *cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux_hpc_node:6.0:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux_hpc_node:7.0:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*
    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:canonical:ubuntu_linux:12.04:*:*:*:lts:*:*:* *cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* *cpe:2.3:o:canonical:ubuntu_linux:15.04:*:*:*:*:*:*:* *cpe:2.3:o:canonical:ubuntu_linux:15.10:*:*:*:*:*:*:*
    Added CPE Configuration OR *cpe:2.3:a:ntp:ntp:4.2.7:p40:*:*:*:*:*:* (and previous)
  • CVE Modified by [email protected]

    Jul. 22, 2017

    Action Type Old Value New Value
    Removed Reference http://bk1.ntp.org/ntp-dev/?PAGE=patch&REV=4c4fc141LwvcoGp-lLGhkAFp3ZvtrA [No Types Assigned]
    Added Reference http://bk1.ntp.org/ntp-dev/?PAGE=patch&REV=4c4fc141LwvcoGp-lLGhkAFp3ZvtrA [No Types Assigned]
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2015-5194 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-2015-5194 weaknesses.

CAPEC-3: Using Leading 'Ghost' Character Sequences to Bypass Input Filters Using Leading 'Ghost' Character Sequences to Bypass Input Filters CAPEC-7: Blind SQL Injection Blind SQL Injection CAPEC-8: Buffer Overflow in an API Call Buffer Overflow in an API Call CAPEC-9: Buffer Overflow in Local Command-Line Utilities Buffer Overflow in Local Command-Line Utilities CAPEC-10: Buffer Overflow via Environment Variables Buffer Overflow via Environment Variables CAPEC-13: Subverting Environment Variable Values Subverting Environment Variable Values CAPEC-14: Client-side Injection-induced Buffer Overflow Client-side Injection-induced Buffer Overflow CAPEC-22: Exploiting Trust in Client Exploiting Trust in Client CAPEC-23: File Content Injection File Content Injection CAPEC-24: Filter Failure through Buffer Overflow Filter Failure through Buffer Overflow CAPEC-28: Fuzzing Fuzzing CAPEC-31: Accessing/Intercepting/Modifying HTTP Cookies Accessing/Intercepting/Modifying HTTP Cookies CAPEC-42: MIME Conversion MIME Conversion CAPEC-43: Exploiting Multiple Input Interpretation Layers Exploiting Multiple Input Interpretation Layers CAPEC-45: Buffer Overflow via Symbolic Links Buffer Overflow via Symbolic Links CAPEC-46: Overflow Variables and Tags Overflow Variables and Tags CAPEC-47: Buffer Overflow via Parameter Expansion Buffer Overflow via Parameter Expansion CAPEC-52: Embedding NULL Bytes Embedding NULL Bytes CAPEC-53: Postfix, Null Terminate, and Backslash Postfix, Null Terminate, and Backslash CAPEC-63: Cross-Site Scripting (XSS) Cross-Site Scripting (XSS) CAPEC-64: Using Slashes and URL Encoding Combined to Bypass Validation Logic Using Slashes and URL Encoding Combined to Bypass Validation Logic CAPEC-67: String Format Overflow in syslog() String Format Overflow in syslog() CAPEC-71: Using Unicode Encoding to Bypass Validation Logic Using Unicode Encoding to Bypass Validation Logic CAPEC-72: URL Encoding URL Encoding CAPEC-73: User-Controlled Filename User-Controlled Filename CAPEC-78: Using Escaped Slashes in Alternate Encoding Using Escaped Slashes in Alternate Encoding CAPEC-79: Using Slashes in Alternate Encoding Using Slashes in Alternate Encoding CAPEC-80: Using UTF-8 Encoding to Bypass Validation Logic Using UTF-8 Encoding to Bypass Validation Logic CAPEC-81: Web Server Logs Tampering Web Server Logs Tampering CAPEC-83: XPath Injection XPath Injection CAPEC-85: AJAX Footprinting AJAX Footprinting CAPEC-88: OS Command Injection OS Command Injection CAPEC-101: Server Side Include (SSI) Injection Server Side Include (SSI) Injection CAPEC-104: Cross Zone Scripting Cross Zone Scripting CAPEC-108: Command Line Execution through SQL Injection Command Line Execution through SQL Injection CAPEC-109: Object Relational Mapping Injection Object Relational Mapping Injection CAPEC-110: SQL Injection through SOAP Parameter Tampering SQL Injection through SOAP Parameter Tampering CAPEC-120: Double Encoding Double Encoding CAPEC-135: Format String Injection Format String Injection CAPEC-136: LDAP Injection LDAP Injection CAPEC-153: Input Data Manipulation Input Data Manipulation CAPEC-182: Flash Injection Flash Injection CAPEC-209: XSS Using MIME Type Mismatch XSS Using MIME Type Mismatch CAPEC-230: Serialized Data with Nested Payloads Serialized Data with Nested Payloads CAPEC-231: Oversized Serialized Data Payloads Oversized Serialized Data Payloads CAPEC-250: XML Injection XML Injection CAPEC-261: Fuzzing for garnering other adjacent user/sensitive data Fuzzing for garnering other adjacent user/sensitive data CAPEC-267: Leverage Alternate Encoding Leverage Alternate Encoding CAPEC-473: Signature Spoof Signature Spoof CAPEC-588: DOM-Based XSS DOM-Based XSS CAPEC-664: Server Side Request Forgery Server Side Request Forgery
Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

1.68 }} -5.94%

score

0.87341

percentile

CVSS30 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability