CVE-2017-17562

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 v3.0 8.1 HIGH
CVSS v2.0 6.8 MEDIUM

8.1^/10

CVSS v3.0 : HIGH

Vector : AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploitability : 2.2 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

6.8^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:M/Au:N/C:P/I:P/A:P

Exploitability : 8.6 / Impact : 6.4

Access Vector NETWORK

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://github.com/embedthis/goahead/issues/249	Issue Tracking Third Party Advisory
https://github.com/embedthis/goahead/commit/6f786c123196eb622625a920d54048629a7caa74	Patch Third Party Advisory
https://www.elttam.com.au/blog/goahead/	Exploit Patch Third Party Advisory
https://github.com/elttam/advisories/tree/master/CVE-2017-17562	Third Party Advisory
https://www.exploit-db.com/exploits/43360/	Exploit Third Party Advisory VDB Entry
https://www.exploit-db.com/exploits/43877/
http://www.securitytracker.com/id/1040702
http://www.oracle.com/technetwork/security-advisory/cpuapr2018-3678067.html

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Configurations

Configuration 1 (hide)

cpe:2.3:a:embedthis:goahead:*:*:*:*:*:*:*:*

Information

Published : 2017-12-12 11:29

Updated : 2018-04-19 18:29

NVD link : CVE-2017-17562

Mitre link : CVE-2017-17562

JSON object : View

CWE

CWE-20

Improper Input Validation

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Products Affected

embedthis

goahead

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