Known exploited vulnerability
CVE-2018-11776
The short answer
CVE-2018-11776 affects Apache Software Foundation Apache Struts and is rated high (CVSS 8.1). CISA added it to the Known Exploited Vulnerabilities catalog on 2021-11-03: attackers are using it, so patch it first. Fixed versions are published for struts2-core (2.3.35, 2.5.17).
What it is
Apache Struts versions 2.3 to 2.3.34 and 2.5 to 2.5.16 suffer from possible Remote Code Execution when alwaysSelectFullNamespace is true (either by user or a plugin like Convention Plugin) and then: results are used with no namespace and in same time, its upper package have no or wildcard namespace and similar to results, same possibility when using url tag which doesn't have value and action set and in same time, its upper package have no or wildcard namespace.
Severity
8.1 high
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Exploited (CISA KEV)
Yes, since Nov 3, 2021
Federal due date May 3, 2022
EPSS, next 30 days
100%
Higher than 100% of scored CVEs
How it can be exploited
- Attack vector
- Network
- Attack complexity
- High
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
What CISA says to do
Apply updates per vendor instructions.
Affected packages and fixed versions
| Package | Ecosystem | Fixed in | Advisory |
|---|---|---|---|
| org.apache.struts:struts2-core | Maven | 2.3.35, 2.5.17 | GHSA-cr6j-3jp9-rw65 |
Is it in your code? Drop your lockfile into the free vulnerability check, or let vulnerability watch check your repository every day and open the upgrade as a pull request.
Affected products
Apache Struts. NVD's record lists the exact affected versions.
References
- cwiki.apache.org/confluence/display/WW/S2-057 Issue TrackingThird Party Advisory
- github.com/hook-s3c/CVE-2018-11776-Python-PoC ExploitThird Party Advisory
- lgtm.com/blog/apache_struts_CVE-2018-11776 ExploitThird Party Advisory
- lists.apache.org/thread.html/r6d03e45b81eab03580cf7f8bb51cb3e9a1b10a2cc0c6a2d3cc92ed0c%40%3Cannounce.apache.org%3E Mailing List
- psirt.global.sonicwall.com/vuln-detail/SNWLID-2018-0012 Third Party Advisory
- security.netapp.com/advisory/ntap-20180822-0001/ Third Party Advisory
- security.netapp.com/advisory/ntap-20181018-0002/ Third Party Advisory
- www.exploit-db.com/exploits/45260/ ExploitThird Party AdvisoryVDB Entry
- www.exploit-db.com/exploits/45262/ ExploitThird Party AdvisoryVDB Entry
- www.exploit-db.com/exploits/45367/ ExploitThird Party AdvisoryVDB Entry
- www.oracle.com/security-alerts/cpujul2020.html Third Party Advisory
- www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html PatchThird Party Advisory
Questions
Is CVE-2018-11776 being exploited?
Yes. CISA added CVE-2018-11776 to its Known Exploited Vulnerabilities catalog on 2021-11-03, with a federal remediation due date of 2022-05-03.
How do I fix CVE-2018-11776?
Upgrade to a fixed version: org.apache.struts:struts2-core (Maven) 2.3.35 or 2.5.17. CISA's required action: Apply updates per vendor instructions.
From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Analyzed. The description is NVD's text, quoted as published.
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