National Vulnerability Database

National Vulnerability Database

National Vulnerability
Database

CVE-2017-17562 Detail

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.

Source:  MITRE      Last Modified:  12/12/2017      View Analysis Description

Quick Info

CVE Dictionary Entry:
CVE-2017-17562
Original release date:
12/12/2017
Last revised:
01/26/2018
Source:
US-CERT/NIST

Impact

CVSS Severity (version 3.0):
CVSS v3 Base Score:
8.1 High
Vector:
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H (legend)
Impact Score:
5.9
Exploitability Score:
2.2
CVSS Version 3 Metrics:
Attack Vector (AV):
Network
Attack Complexity (AC):
High
Privileges Required (PR):
None
User Interaction (UI):
None
Scope (S):
Unchanged
Confidentiality (C):
High
Integrity (I):
High
Availability (A):
High
CVSS Severity (version 2.0):
CVSS v2 Base Score:
6.8 MEDIUM
Vector:
(AV:N/AC:M/Au:N/C:P/I:P/A:P) (legend)
Impact Subscore:
6.4
Exploitability Subscore:
8.6
CVSS Version 2 Metrics:
Access Vector:
Network exploitable
Access Complexity:
Medium
Authentication:
Not required to exploit
Impact Type:
Allows unauthorized disclosure of information; Allows unauthorized modification; Allows disruption of service

References to Advisories, Solutions, and Tools

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Hyperlink Resource Type Source Name
https://github.com/elttam/advisories/tree/master/CVE-2017-17562 Third Party Advisory External Source MISC https://github.com/elttam/advisories/tree/master/CVE-2017-17562
https://github.com/embedthis/goahead/commit/6f786c123196eb622625a920d54048629a7caa74 Patch; Third Party Advisory External Source MISC https://github.com/embedthis/goahead/commit/6f786c123196eb622625a920d54048629a7caa74
https://github.com/embedthis/goahead/issues/249 Issue Tracking; Third Party Advisory External Source MISC https://github.com/embedthis/goahead/issues/249
https://www.elttam.com.au/blog/goahead/ Exploit; Patch; Third Party Advisory External Source MISC https://www.elttam.com.au/blog/goahead/
https://www.exploit-db.com/exploits/43360/ Exploit; Third Party Advisory; VDB Entry External Source EXPLOIT-DB 43360
https://www.exploit-db.com/exploits/43877/ External Source EXPLOIT-DB 43877

Technical Details

Vulnerability Type (View All)

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