nuclei-templates/http/cves/2021/CVE-2021-22205.yaml

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id: CVE-2021-22205
info:
name: GitLab CE/EE - Remote Code Execution
author: GitLab Red Team
severity: critical
description: GitLab CE/EE starting from 11.9 does not properly validate image files that were passed to a file parser, resulting in a remote command execution vulnerability. This template attempts to passively identify vulnerable versions of GitLab without the need for an exploit by matching unique hashes for the application-<hash>.css file in the header for unauthenticated requests. Positive matches do not guarantee exploitability. Tooling to find relevant hashes based on the semantic version ranges specified in the CVE is linked in the references section below.
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impact: |
Successful exploitation of this vulnerability could allow an attacker to execute arbitrary code on the affected GitLab instance.
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remediation: |
Upgrade to GitLab CE/EE version 13.10.3 or 13.11.1 to mitigate this vulnerability.
reference:
- https://gitlab.com/gitlab-com/gl-security/security-operations/gl-redteam/red-team-research/cve-2021-22205-hash-generator
- https://gitlab.com/gitlab-com/gl-security/security-operations/gl-redteam/red-team-operations/-/issues/196
- https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-22205.json
- https://censys.io/blog/cve-2021-22205-it-was-a-gitlab-smash/
- https://security.humanativaspa.it/gitlab-ce-cve-2021-22205-in-the-wild/
- https://hackerone.com/reports/1154542
- https://nvd.nist.gov/vuln/detail/CVE-2021-22205
classification:
cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
cvss-score: 10
cve-id: CVE-2021-22205
2023-07-11 19:49:27 +00:00
cwe-id: CWE-94
epss-score: 0.97333
epss-percentile: 0.99868
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cpe: cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*
metadata:
max-request: 1
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vendor: gitlab
product: gitlab
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shodan-query: http.title:"GitLab"
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fofa-query: title="gitlab"
google-query: intitle:"gitlab"
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tags: cve2021,cve,kev,hackerone,gitlab,rce
http:
- method: GET
path:
- "{{BaseURL}}/users/sign_in"
host-redirects: true
max-redirects: 3
matchers:
- type: word
words:
- "015d088713b23c749d8be0118caeb21039491d9812c75c913f48d53559ab09df"
- "02aa9533ec4957bb01d206d6eaa51d762c7b7396362f0f7a3b5fb4dd6088745b"
- "051048a171ccf14f73419f46d3bd8204aa3ed585a72924faea0192f53d42cfce"
- "08858ced0ff83694fb12cf155f6d6bf450dcaae7192ea3de8383966993724290"
- "0993beabc8d2bb9e3b8d12d24989426b909921e20e9c6a704de7a5f1dfa93c59"
- "0a5b4edebfcb0a7be64edc06af410a6fbc6e3a65b76592a9f2bcc9afea7eb753"
- "1084266bd81c697b5268b47c76565aa86b821126a6b9fe6ea7b50f64971fc96f"
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- "39fdbd63424a09b5b065a6cc60c9267d3f49950bf1f1a7fd276fe1ece4a35c09"
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- "bb1565ffd7c937bea412482ed9136c6057be50356f1f901379586989b4dfe2ca"
- "be9a23d3021354ec649bc823b23eab01ed235a4eb730fd2f4f7cdb2a6dee453a"
- "bec9544b57b8b2b515e855779735ad31c3eacf65d615b4bfbd574549735111e7"
- "bf1ba5d5d3395adc5bad6f17cc3cb21b3fb29d3e3471a5b260e0bc5ec7a57bc4"
- "bf1c397958ee5114e8f1dadc98fa9c9d7ddb031a4c3c030fa00c315384456218"
- "c8d8d30d89b00098edab024579a3f3c0df2613a29ebcd57cdb9a9062675558e4"
- "c923fa3e71e104d50615978c1ab9fcfccfcbada9e8df638fc27bf4d4eb72d78c"
- "d0850f616c5b4f09a7ff319701bce0460ffc17ca0349ad2cf7808b868688cf71"
- "d161b6e25db66456f8e0603de5132d1ff90f9388d0a0305d2d073a67fd229ddb"
- "d56f0577fbbbd6f159e9be00b274270cb25b60a7809871a6a572783b533f5a3c"
- "d812b9bf6957fafe35951054b9efc5be6b10c204c127aa5a048506218c34e40f"
- "dc6b3e9c0fad345e7c45a569f4c34c3e94730c33743ae8ca055aa6669ad6ac56"
- "def1880ada798c68ee010ba2193f53a2c65a8981871a634ae7e18ccdcd503fa3"
- "e2578590390a9eb10cd65d130e36503fccb40b3921c65c160bb06943b2e3751a"
- "e4b6f040fe2e04c86ed1f969fc72710a844fe30c3501b868cb519d98d1fe3fd0"
- "eb078ffe61726e3898dc9d01ea7955809778bde5be3677d907cbd3b48854e687"
- "ec9dfedd7bd44754668b208858a31b83489d5474f7606294f6cc0128bb218c6d"
- "ed4780bb05c30e3c145419d06ad0ab3f48bd3004a90fb99601f40c5b6e1d90fd"
- "ef53a4f4523a4a0499fb892d9fb5ddb89318538fef33a74ce0bf54d25777ea83"
- "f154ef27cf0f1383ba4ca59531058312b44c84d40938bc8758827023db472812"
- "f7d1309f3caef67cb63bd114c85e73b323a97d145ceca7d6ef3c1c010078c649"
- "f9ab217549b223c55fa310f2007a8f5685f9596c579f5c5526e7dcb204ba0e11"
condition: or
extractors:
- type: regex
group: 1
regex:
- '(?:application-)(\S{64})(?:\.css)'
# digest: 4a0a00473045022100abc381440f9275837d7e15eedee65a255ebe4897cdd81a9ec8bddc15e9fff97f02204d5198bbdca5253fecaf70b30ba2a9cb00162a44795ea0769c8d3c00f92c72fa:922c64590222798bb761d5b6d8e72950