CVE-2017-17562
Published 2017-12-12 · Updated 2026-06-17 · Source cve@mitre.org
Summary
CVE-2017-17562 is a high-severity (CVSS 8.1) vulnerability in Embedthis GoAhead. CISA added it to the Known Exploited Vulnerabilities catalog on December 10, 2021, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by June 10, 2022. CISA does not currently list it as used in ransomware campaigns.
All 1 known-exploited Embedthis vulnerabilities →Description
Embedthis GoAhead before 3.6.5 allows remote code execution if CGI is enabled and a CGI program is dynamically linked. This is a result of initializing the environment of forked CGI scripts using untrusted HTTP request parameters in the cgiHandler function in cgi.c. When combined with the glibc dynamic linker, this behaviour can be abused for remote code execution using special parameter names such as LD_PRELOAD. An attacker can POST their shared object payload in the body of the request, and reference it using /proc/self/fd/0.
CVSS vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA Known-Exploited Vulnerability
Product: Embedthis — GoAhead
Name: Embedthis GoAhead Remote Code Execution Vulnerability
Date added: 2021-12-10 · Due: 2022-06-10
Required action: Apply updates per vendor instructions.
References
- http://www.oracle.com/technetwork/security-advisory/cpuapr2018-3678067.html
- http://www.securitytracker.com/id/1040702
- https://github.com/elttam/advisories/tree/master/CVE-2017-17562
- https://github.com/embedthis/goahead/commit/6f786c123196eb622625a920d54048629a7caa74
- https://github.com/embedthis/goahead/issues/249
- https://www.elttam.com.au/blog/goahead/
- https://www.exploit-db.com/exploits/43360/
- https://www.exploit-db.com/exploits/43877/