CVE-2018-11776: high-severity vulnerability in Apache Struts
Published · Updated
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100Vexday Risk Score
Patch now. It under exploitation confirmed by CISA and has a working public exploit.
ssvc Actcvss 8.1epss 100%
from disclosure to weapon1 day
Published on NVDAug 22
1st PoC+1d
metasploitAug 22
CISA KEV+1169d
What the vendors declare (VEX)
Official vendor statements in CSAF/VEX format: whether their product is affected, already fixed, or ruled out — and why. These are the vendor's assertions, not Vexday's judgment.
Red HatVEX document ↗
Not affected
1 product — because the vulnerable code is not present in the product
Red Hat JBoss Fuse Service Works 6
Action required by CISAfederal deadline: 2022-05-03
Apply updates per vendor instructions.
In short
Apache Struts has a flaw that allows attackers to run harmful code on servers running vulnerable versions. This happens when certain namespace settings are misconfigured, letting attackers inject commands through web requests.
Technical detail
Remote Code Execution vulnerability in Apache Struts 2.3.0-2.3.34 and 2.5.0-2.5.16 when alwaysSelectFullNamespace is enabled and namespace handling results in incomplete or wildcard namespace resolution. Attack vector is network-based via crafted requests to results without explicit namespaces or url tags with missing action values; exploitation requires specific package/namespace configuration conditions.
Summary generated and translated by AI from the official description.
The full analysis of this CVE is available in Portuguese →
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.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected products
Apache Software Foundation · Apache Strutspublic PoCs found — 44✓ VexDay Proof
exploitdb✓ VexDay Proofwww.exploit-db.com/exploits/45367exploitdbwww.exploit-db.com/exploits/45260unverifiedexploitdbwww.exploit-db.com/exploits/45262unverifiedgithubgithub.com/mazen160/struts-pwn_CVE-2018-11776★ 304githubgithub.com/hook-s3c/CVE-2018-11776-Python-PoC★ 123githubgithub.com/649/Apache-Struts-Shodan-Exploit★ 56githubgithub.com/Ekultek/Strutter★ 21githubgithub.com/brianwrf/S2-057-CVE-2018-11776★ 16githubgithub.com/arlyone/Apache-Struts-0Day-Exploit★ 16githubgithub.com/xfox64x/CVE-2018-11776★ 15githubgithub.com/bhdresh/CVE-2018-11776★ 12githubgithub.com/jiguangsdf/CVE-2018-11776★ 10githubgithub.com/knqyf263/CVE-2018-11776★ 4githubgithub.com/tuxotron/cve-2018-11776-docker★ 3githubgithub.com/cved-sources/cve-2018-11776★ 1githubgithub.com/m4sk0ff/CVE-2018-11776★ 0githubgithub.com/jezzus/CVE-2018-11776-Python-PoC★ 0githubgithub.com/cucadili/CVE-2018-11776★ 0githubgithub.com/freshdemo/ApacheStruts-CVE-2018-11776★ 0githubgithub.com/sonpt-afk/CVE-2018-11776-FIS★ 0githubgithub.com/OzNetNerd/apche-struts-vuln-demo-cve-2018-11776★ 0cve_referencewww.exploit-db.com/exploits/45262/unverifiedcve_referencewww.exploit-db.com/exploits/45367/unverifiedvulncheckvulncheck.com/xdb/b878f3547573unverifiedcve_referencepacketstormsecurity.com/files/172830/Apache-Struts-Remote-Code-Execution.htmlunverifiedcve_referencewww.exploit-db.com/exploits/45260/unverifiedvulncheckvulncheck.com/xdb/a77791dae374unverifiedvulncheckvulncheck.com/xdb/3c27e7312b41unverifiedvulncheckvulncheck.com/xdb/df6d7ff7d1ecunverifiedvulncheckvulncheck.com/xdb/9047aecb9a46unverifiedvulncheckvulncheck.com/xdb/8b73fc205202unverifiedvulncheckvulncheck.com/xdb/4ab6e9a43949unverifiedvulncheckvulncheck.com/xdb/80e42f4cab6bunverifiedvulncheckvulncheck.com/xdb/306db2bfde48unverifiedvulncheckvulncheck.com/xdb/65f49344f646unverifiedvulncheckvulncheck.com/xdb/1d30c749488dunverifiedvulncheckvulncheck.com/xdb/b26aba013508unverifiedvulncheckvulncheck.com/xdb/7380914b3f92unverifiedvulncheckvulncheck.com/xdb/e1d36328bfd4unverifiedvulncheckvulncheck.com/xdb/515a9f223269unverifiedvulncheckvulncheck.com/xdb/db2bd9c38413unverifiedvulncheckvulncheck.com/xdb/3dd317159905unverifiedvulncheckvulncheck.com/xdb/3d93850f32dcunverifiedvulncheckvulncheck.com/xdb/bc306d38c92cunverified⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
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References
http://packetstormsecurity.com/files/172830/Apache-Struts-Remote-Code-Execution.htmlhttps://cwiki.apache.org/confluence/display/WW/S2-057https://github.com/hook-s3c/CVE-2018-11776-Python-PoChttps://lgtm.com/blog/apache_struts_CVE-2018-11776https://lists.apache.org/thread.html/r6d03e45b81eab03580cf7f8bb51cb3e9a1b10a2cc0c6a2d3cc92ed0c%40%3Cannounce.apache.org%3Ehttps://psirt.global.sonicwall.com/vuln-detail/SNWLID-2018-0012https://security.netapp.com/advisory/ntap-20180822-0001/https://security.netapp.com/advisory/ntap-20181018-0002/https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-11776https://www.exploit-db.com/exploits/45260/https://www.exploit-db.com/exploits/45262/https://www.exploit-db.com/exploits/45367/