CG

Carnal0wnage & Attack Research Blog

second exploit from the blog posthttps://blog.orange.tw/2019/01/hacking-jenkins-part-1-play-with-dynamic-routing.htmlChained with CVE-2018-1000600 to a Pre-auth Fully-responded SSRFhttps://jenkins.io/security/advisory/2018-06-25/#SECURITY-915This affects the GitHub plugin that is installed by default. However, I learned that when you spin up a new jenkins instance it pulls all the updated plugins (also by default) I'm honestly not sure how often people ... Read More

If you find yourself on a Jenkins box with script console access you can decrypt the saved passwords in credentials.xml in the following way:hashed_pw='$PASSWORDHASH'passwd = hudson.util.Secret.decrypt(hashed_pw)println(passwd)You need to perform this on the the Jenkins system itself as it's using the local master.key and hudson.util.SecretScreenshot belowCode to get the credentials.xml from ... Read More

A collection of posts on attacking Jenkinshttp://www.labofapenetrationtester.com/2014/08/script-execution-and-privilege-esc-jenkins.htmlManipulating build steps to get RCEhttps://medium.com/@uranium238/shodan-jenkins-to-get-rces-on-servers-6b6ec7c960e2Using the terminal plugin to get RCEhttps://sharadchhetri.com/2018/12/02/managing-jenkins-plugins/Getting going with the jenkins-clihttps://github.com/Coalfire-Research/java-deserialization-exploits/tree/master/Jenkinshttps://www.contrastsecurity.com/security-influencers/serialization-must-die-act-2-xstreamCVE-2015-8103 & CVE-2016-0792https://blog.orange.tw/2019/01/hacking-jenkins-part-1-play-with-dynamic-routing.htmlhttp://blog.orange.tw/2019/02/abusing-meta-programming-for-unauthenticated-rce.htmlunauth user enumeration jenkins 1>CVE-2019-1003000 (https://jenkins.io/security/advisory/2019-01-08/#SECURITY-1266)vulns in: Pipeline: Declarative Plugin up to and including 1.3.4Pipeline: Groovy Plugin up to and including 2.61Script Security Plugin up to and ... Read More

After the release of Orange Tsai's exploit for Jenkins. I've been doing some poking. PreAuth RCE against Jenkins is something everyone wants.While not totally related to the blog post and tweet the following exploit came up while searching.What I have figured out that is important is the plug versions as ... Read More

Jenkins notes for:https://blog.orange.tw/2019/01/hacking-jenkins-part-1-play-with-dynamic-routing.htmlhttp://blog.orange.tw/2019/02/abusing-meta-programming-for-unauthenticated-rce.htmlto download old jenkins WAR fileshttp://updates.jenkins-ci.org/download/war/1st bug in the blog is a username enumeration bug inJenkins weekly up to and including 2.145Jenkins LTS up to and including 2.138.1From the blog:Pre-auth User Information LeakageWhile testing Jenkins, it’s a common scenario that you want to perform a brute-force attack but ... Read More

Notes on abusing open Docker socketsThis wont cover breaking out of docker containersPorts: usually 2375 & 2376 but can be anythingRefs:https://blog.sourcerer.io/a-crash-course-on-docker-learn-to-swim-with-the-big-fish-6ff25e8958b0https://www.slideshare.net/BorgHan/hacking-docker-the-easy-wayhttps://blog.secureideas.com/2018/05/escaping-the-whale-things-you-probably-shouldnt-do-with-docker-part-1.htmlhttps://blog.secureideas.com/2018/08/escaping-the-whale-things-you-probably-shouldnt-do-with-docker-part-2.htmlhttps://infoslack.com/devops/exploring-docker-remote-apihttps://www.blackhat.com/docs/us-17/thursday/us-17-Cherny-Well-That-Escalated-Quickly-How-Abusing-The-Docker-API-Led-To-Remote-Code-Execution-Same-Origin-Bypass-And-Persistence_wp.pdfhttps://raesene.github.io/blog/2016/03/06/The-Dangers-Of-Docker.sock/https://cert.litnet.lt/2016/11/owning-system-through-an-exposed-docker-engine/https://medium.com/@riccardo.ancarani94/attacking-docker-exposed-api-3e01ffc3c124https://www.exploit-db.com/exploits/42356https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/linux/http/docker_daemon_tcp.rbhttp://blog.nibblesec.org/2014/09/abusing-dockers-remote-apis.htmlhttps://www.prodefence.org/knock-knock-docker-will-you-let-me-in-open-api-abuse-in-docker-containers/https://blog.ropnop.com/plundering-docker-images/Enable docker socket (Create practice locations)https://success.docker.com/article/how-do-i-enable-the-remote-api-for-dockerdHaving the docker API | socket exposed is essentially granting root to any of the containers on the systemThe daemon listens on unix:///var/run/docker.sock but you ... Read More

Unauth API access (10250)Most Kubernetes deployments provide authentication for this port. But it’s still possible to expose it inadvertently and it's still pretty common to find it exposed via the "insecure API service" option.Everybody who has access to the service kubelet port (10250), even without a certificate, can execute any ... Read More

Kubernetes: unauthenticated kublet API (10250) token theft & kubectl access & execkube-hunter output to get us started: do a curl -s https://k8-node:10250/runningpods/ to get a list of running podsWith that data, you can craft your post request to exec within a pod so we can poke around. Example request:curl -k ... Read More

Below is some sample output that mainly is here to see what open 10255 will give you and look like. What probably of most interest is the /pods endpointor the /metrics endpointor the /stats endpoint $ ./kube-hunter.pyChoose one of the options below:1. Remote scanning (scans one or more specific IPs ... Read More

How to get the info that kube-hunter reports for open /containerLogs endpointVulnerabilities+---------------+-------------+------------------+----------------------+----------------+| LOCATION CATEGORY | VULNERABILITY | DESCRIPTION | EVIDENCE |+---------------+-------------+------------------+----------------------+----------------++----------------+------------+------------------+----------------------+----------------+| 1.2.3.4:10250 | Information | Exposed Container| Output logs from a | || | Disclosure | Logs | running container | || | | | are using the | || ... Read More