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CVE-2017-17562
Current 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.
Basic Data
| Published | December 12, 2017 |
|---|---|
| Last Modified | April 20, 2018 |
| Assigner | cve@mitre.org |
| Data Type | CVE |
| Data Format | MITRE |
| Data Version | 4.0 |
| Problem Type | CWE-20 |
| CVE Data Version | 4.0 |
Base Metric V2
| CVSS 2 - Version | 2.0 |
|---|---|
| CVSS 2 - Vector String | AV:N/AC:M/Au:N/C:P/I:P/A:P |
| CVSS 2 - Access Vector | NETWORK |
| CVSS 2 - Access Complexity | MEDIUM |
| CVSS 2 - Authentication | NONE |
| CVSS 2 - Confidentiality Impact | PARTIAL |
| CVSS 2 - Availability Impact | PARTIAL |
| CVSS 2 - Base Score | 6.8 |
| Severity | MEDIUM |
| Exploitability Score | 8.6 |
| Impact Score | 6.4 |
| Obtain All Privilege | false |
| Obtain User Privilege | false |
| Obtain Other Privilege | false |
Base Metric V3
| CVSS 3 - Version | 3.0 |
|---|---|
| CVSS 3 - Vector String | CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |
| CVSS 3 - Attack Vector | NETWORK |
| CVSS 3 - Attack Complexity | HIGH |
| CVSS 3 - Privileges Required | NONE |
| CVSS 3 - User Interaction | NONE |
| CVSS 3 - Scope | UNCHANGED |
| CVSS 3 - Confidentiality Impact | HIGH |
| CVSS 3 - Integrity Impact | HIGH |
| CVSS 3 - Availability Impact | HIGH |
| CVSS 3 - Base Score | 8.1 |
| CVSS 3 - Base Severity | HIGH |
| Exploitability Score | 2.2 |
| Base Severity | HIGH |
Configurations
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OR - Configuration 1
Cpe Version Part Vendor Product Version Update Edition Language SW Edition Target SW Target HW Other Version Start Including Version End Including Version Start Excluding Version End Excluding 2.3 Application Embedthis Goahead * * * * * * * * 3.6.5
Vulnerable Software List
| Vendor | Product | Versions |
|---|---|---|
| Embedthis | Goahead | * |
References
| Name | Source | URL | Tags |
|---|---|---|---|
| http://www.oracle.com/technetwork/security-advisory/cpuapr2018-3678067.html | http://www.oracle.com/technetwork/security-advisory/cpuapr2018-3678067.html | CONFIRM | |
| 1040702 | http://www.securitytracker.com/id/1040702 | SECTRACK | |
| https://github.com/elttam/advisories/tree/master/CVE-2017-17562 | https://github.com/elttam/advisories/tree/master/CVE-2017-17562 | MISC | Third Party Advisory |
| https://github.com/embedthis/goahead/commit/6f786c123196eb622625a920d54048629a7caa74 | https://github.com/embedthis/goahead/commit/6f786c123196eb622625a920d54048629a7caa74 | MISC | Patch Third Party Advisory |
| https://github.com/embedthis/goahead/issues/249 | https://github.com/embedthis/goahead/issues/249 | MISC | Issue Tracking Third Party Advisory |
| https://www.elttam.com.au/blog/goahead/ | https://www.elttam.com.au/blog/goahead/ | MISC | Exploit Patch Third Party Advisory |
| 43360 | https://www.exploit-db.com/exploits/43360/ | EXPLOIT-DB | Exploit Third Party Advisory VDB Entry |
| 43877 | https://www.exploit-db.com/exploits/43877/ | EXPLOIT-DB |