Out-of-bounds write in ntpsec (Alpine package)
| Risk | High |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2019-6442 |
| CWE-ID | CWE-787 |
| Exploitation vector | Network |
| Public exploit | Public exploit code for vulnerability #1 is available. |
| Vulnerable software Subscribe |
ntpsec (Alpine package) Operating systems & Components / Operating system package or component |
| Vendor | Alpine Linux Development Team |
Security Bulletin
This security bulletin contains one high risk vulnerability.
1) Out-of-bounds write
EUVDB-ID: #VU17181
Risk: High
CVSSv3.1: 8.9 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C]
CVE-ID: CVE-2019-6442
CWE-ID:
CWE-787 - Out-of-bounds write
Exploit availability: Yes
DescriptionThe vulnerability allows a remote authenticated attacker to execute arbitrary code on the target system.
The weakness exists due to the affected software allows one byte to be written out of bounds in the ntpd daemon, related to the config_remotely function in the ntp_config.c source code file, the yyparse function in the ntp_parser.tab.c source code file, and the yyerror function in the ntp_parser.y source code file. A remote attacker can send a configuration request that submits malicious input, trigger ou-of-bounds write and execute arbitrary code with elevated privileges.
Successful exploitation of the vulnerability may result in system compromise.
Install update from vendor's website.
Vulnerable software versionsntpsec (Alpine package): 1.1.1-r0 - 1.1.1-r2
External linkshttp://git.alpinelinux.org/aports/commit/?id=6e65ec77c34fcea98b3b7fbef8cb62d3b6dae0d3
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.
