CVE-2021-3047 (GCVE-0-2021-3047)
Vulnerability from cvelistv5 – Published: 2021-08-11 17:10 – Updated: 2024-09-17 02:32
VLAI
EPSS
VEX
Title
PAN-OS: Weak Cryptography Used in Web Interface Authentication
Summary
A cryptographically weak pseudo-random number generator (PRNG) is used during authentication to the Palo Alto Networks PAN-OS web interface. This enables an authenticated attacker, with the capability to observe their own authentication secrets over a long duration on the PAN-OS appliance, to impersonate another authenticated web interface administrator's session. This issue impacts: PAN-OS 8.1 versions earlier than PAN-OS 8.1.19; PAN-OS 9.0 versions earlier than PAN-OS 9.0.14; PAN-OS 9.1 versions earlier than PAN-OS 9.1.10; PAN-OS 10.0 versions earlier than PAN-OS 10.0.4. PAN-OS 10.1 versions are not impacted.
Severity
4.2 (Medium)
CWE
- CWE-338 - Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://security.paloaltonetworks.com/CVE-2021-3047 | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Palo Alto Networks | PAN-OS |
Unaffected:
10.1.*
Affected: 8.1 , < 8.1.19 (custom) Affected: 9.0 , < 9.0.14 (custom) Affected: 10.0 , < 10.0.4 (custom) Affected: 9.1 , < 9.1.10 (custom) |
guessed |
Date Public
2021-08-11 00:00
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},
"nvd": "{\"cve\":{\"id\":\"CVE-2021-3047\",\"sourceIdentifier\":\"psirt@paloaltonetworks.com\",\"published\":\"2021-08-11T17:15:07.523\",\"lastModified\":\"2024-11-21T06:20:50.483\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"A cryptographically weak pseudo-random number generator (PRNG) is used during authentication to the Palo Alto Networks PAN-OS web interface. This enables an authenticated attacker, with the capability to observe their own authentication secrets over a long duration on the PAN-OS appliance, to impersonate another authenticated web interface administrator\u0027s session. This issue impacts: PAN-OS 8.1 versions earlier than PAN-OS 8.1.19; PAN-OS 9.0 versions earlier than PAN-OS 9.0.14; PAN-OS 9.1 versions earlier than PAN-OS 9.1.10; PAN-OS 10.0 versions earlier than PAN-OS 10.0.4. PAN-OS 10.1 versions are not impacted.\"},{\"lang\":\"es\",\"value\":\"Es usado un generador de n\u00fameros pseudoaleatorios (PRNG) d\u00e9bil desde el punto de vista criptogr\u00e1fico durante la autenticaci\u00f3n en la interfaz web de PAN-OS de Palo Alto Networks. Esto permite a un atacante autenticado, con capacidad para observar sus propios secretos de autenticaci\u00f3n durante un tiempo prolongado en el dispositivo PAN-OS, hacerse pasar por la sesi\u00f3n de otro administrador de la interfaz web autenticado. Este problema afecta a: PAN-OS versiones 8.1 anteriores a PAN-OS 8.1.19; PAN-OS versiones 9.0 anteriores a PAN-OS 9.0.14; PAN-OS versiones 9.1 anteriores a PAN-OS 9.1.10; PAN-OS versiones 10.0 anteriores a PAN-OS 10.0.4. PAN-OS versiones 10.1 no est\u00e1n afectadas\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"psirt@paloaltonetworks.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N\",\"baseScore\":4.2,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"HIGH\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"LOW\",\"integrityImpact\":\"LOW\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":1.6,\"impactScore\":2.5},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N\",\"baseScore\":3.1,\"baseSeverity\":\"LOW\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"HIGH\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"LOW\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":1.6,\"impactScore\":1.4}],\"cvssMetricV2\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:N/AC:M/Au:S/C:N/I:P/A:N\",\"baseScore\":3.5,\"accessVector\":\"NETWORK\",\"accessComplexity\":\"MEDIUM\",\"authentication\":\"SINGLE\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"PARTIAL\",\"availabilityImpact\":\"NONE\"},\"baseSeverity\":\"LOW\",\"exploitabilityScore\":6.8,\"impactScore\":2.9,\"acInsufInfo\":false,\"obtainAllPrivilege\":false,\"obtainUserPrivilege\":false,\"obtainOtherPrivilege\":false,\"userInteractionRequired\":false}]},\"weaknesses\":[{\"source\":\"psirt@paloaltonetworks.com\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-338\"}]},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-338\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:paloaltonetworks:pan-os:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"8.1.0\",\"versionEndExcluding\":\"8.1.19\",\"matchCriteriaId\":\"186F919F-1EF1-4190-9852-2D64CF508E87\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:paloaltonetworks:pan-os:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"9.0.0\",\"versionEndExcluding\":\"9.0.14\",\"matchCriteriaId\":\"E9EE274A-3AF1-4204-B43D-1EA54C6442CC\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:paloaltonetworks:pan-os:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"9.1.0\",\"versionEndExcluding\":\"9.1.10\",\"matchCriteriaId\":\"6EED4206-00CC-449A-9681-612EC258CCEF\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:paloaltonetworks:pan-os:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"10.0.0\",\"versionEndExcluding\":\"10.0.4\",\"matchCriteriaId\":\"5914FFE6-7B35-4593-8F06-8C059C920AEA\"}]}]}],\"references\":[{\"url\":\"https://security.paloaltonetworks.com/CVE-2021-3047\",\"source\":\"psirt@paloaltonetworks.com\",\"tags\":[\"Vendor Advisory\"]},{\"url\":\"https://security.paloaltonetworks.com/CVE-2021-3047\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Vendor Advisory\"]}]}}",
"redhat_vex": {
"current_release_date": "2026-03-27T14:12:20+00:00",
"cve": "CVE-2021-3047",
"id": "CVE-2021-3047",
"initial_release_date": "2021-08-11T00:00:00+00:00",
"product_status:known_not_affected": "1",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "PAN-OS: Weak Cryptography Used in Web Interface Authentication",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-3047.json",
"version": "3"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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