CVE-2017-17562

high-risk
Published 2017-12-12

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.

Do I need to act?

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94.3% chance of exploitation in next 30 days
EPSS score — higher than 6% of all CVEs
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CISA KEV: actively exploited in the wild
On the Known Exploited Vulnerabilities catalog — federal agencies must patch
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2 public exploits available
43360, 43877
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
8
CVSS 8.1/10 High
NETWORK / HIGH complexity

Affected Products (3)

Affected Vendors

Embedthis Oracle

References (17)

Patch http://www.oracle.com/technetwork/security-advisory/cpuapr2018-3678067.html
Broken Link http://www.securitytracker.com/id/1040702
Broken Link https://github.com/elttam/advisories/tree/master/CVE-2017-17562
Broken Link https://github.com/embedthis/goahead/commit/6f786c123196eb622625a920d54048629a7c...
Broken Link https://github.com/embedthis/goahead/issues/249
Broken Link https://www.elttam.com.au/blog/goahead/
Exploit https://www.exploit-db.com/exploits/43360/
Exploit https://www.exploit-db.com/exploits/43877/
Patch http://www.oracle.com/technetwork/security-advisory/cpuapr2018-3678067.html
Broken Link http://www.securitytracker.com/id/1040702
Broken Link https://github.com/elttam/advisories/tree/master/CVE-2017-17562
Broken Link https://github.com/embedthis/goahead/commit/6f786c123196eb622625a920d54048629a7c...
Broken Link https://github.com/embedthis/goahead/issues/249
Broken Link https://www.elttam.com.au/blog/goahead/
Exploit https://www.exploit-db.com/exploits/43360/
Exploit https://www.exploit-db.com/exploits/43877/
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-...
67
/ 100
high-risk
Severity 24/34 · High
Exploitability 34/34 · Critical
Exposure 9/34 · Low