NTPsec up to 1.1.2 ntpd ntp_config.c Request out-of-bounds write

Summaryinfo

A vulnerability described as critical has been identified in NTPsec up to 1.1.2. This vulnerability affects unknown code of the file ntp_config.c of the component ntpd. The manipulation as part of Request results in out-of-bounds write. This vulnerability is reported as CVE-2019-6442. The attack can be launched remotely. Moreover, an exploit is present. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability, which was classified as critical, was found in NTPsec up to 1.1.2. Affected is an unknown code block of the file ntp_config.c of the component ntpd. The manipulation as part of a Request leads to a out-of-bounds write vulnerability. CWE is classifying the issue as CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

An issue was discovered in NTPsec before 1.1.3. An authenticated attacker can write one byte out of bounds in ntpd via a malformed config request, related to config_remotely in ntp_config.c, yyparse in ntp_parser.tab.c, and yyerror in ntp_parser.y.

The bug was discovered 01/16/2019. The weakness was disclosed 01/16/2019 (Website). The advisory is shared for download at dumpco.re. This vulnerability is traded as CVE-2019-6442 since 01/15/2019. The exploitability is told to be easy. It is possible to launch the attack remotely. The requirement for exploitation is a authentication. Technical details and a public exploit are known.

The exploit is shared for download at exploit-db.com. It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 121340 (openSUSE Security Update : ntpsec (openSUSE-2019-82)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family SuSE Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 371590 (NTPsec Multiple Vulnerabilities).

Upgrading to version 1.1.3 eliminates this vulnerability. A possible mitigation has been published 1 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Exploit-DB (46178) and Tenable (121340). The entries VDB-129793, VDB-129794 and VDB-129795 are pretty similar. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Name

• NTPsec

Version

• 1.1.0
• 1.1.1
• 1.1.2

CPE 2.3info

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CPE 2.2info

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VulDB is the best source for vulnerability data and more expert information about this specific topic.

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