CVE-2021-32489

An issue was discovered in the _send_secure_msg() function of Yubico yubihsm-shell through 2.0.3. The function does not correctly validate the embedded length field of an authenticated message received from the device because response_msg.st.len=8 can be accepted but triggers an integer overflow, which causes CRYPTO_cbc128_decrypt (in OpenSSL) to encounter an undersized buffer and experience a segmentation fault. The yubihsm-shell project is included in the YubiHSM 2 SDK product.

CVSS v3 4.4 MEDIUM
CVSS v2.0 3.5 LOW

4.4^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 0.7 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

3.5^/10

CVSS v2.0 : LOW

Vector : AV:N/AC:M/Au:S/C:N/I:N/A:P

Exploitability : 6.8 / Impact : 2.9

Access Vector NETWORK

Access Complexity MEDIUM

Authentication SINGLE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

References

Link	Resource
https://blog.inhq.net/posts/yubico-libyubihsm-vuln2/#second-attack-variant-cve-pending	Exploit Third Party Advisory
https://blog.inhq.net/posts/yubico-libyubihsm-vuln2/#second-attack-variant-cve-pending	Exploit Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:yubico:yubihsm-shell:*:*:*:*:*:*:*:*

History

21 Nov 2024, 06:07

Type	Values Removed	Values Added
References	~~() https://blog.inhq.net/posts/yubico-libyubihsm-vuln2/#second-attack-variant-cve-pending - Exploit, Third Party Advisory~~	() https://blog.inhq.net/posts/yubico-libyubihsm-vuln2/#second-attack-variant-cve-pending - Exploit, Third Party Advisory

Information

Published : 2021-05-10 22:15

Updated : 2024-11-21 06:07

NVD link : CVE-2021-32489

Mitre link : CVE-2021-32489

CVE.ORG link : CVE-2021-32489

JSON object : View

Products Affected

yubico

yubihsm-shell

CWE

CWE-190

Integer Overflow or Wraparound

{"id": "CVE-2021-32489", "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 3.5, "accessVector": "NETWORK", "vectorString": "AV:N/AC:M/Au:S/C:N/I:N/A:P", "authentication": "SINGLE", "integrityImpact": "NONE", "accessComplexity": "MEDIUM", "availabilityImpact": "PARTIAL", "confidentialityImpact": "NONE"}, "acInsufInfo": false, "impactScore": 2.9, "baseSeverity": "LOW", "obtainAllPrivilege": false, "exploitabilityScore": 6.8, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}], "cvssMetricV31": [{"type": "Secondary", "source": "cve@mitre.org", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 4.4, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "HIGH", "privilegesRequired": "HIGH", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 0.7}, {"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 4.4, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "HIGH", "privilegesRequired": "HIGH", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 0.7}]}, "published": "2021-05-10T22:15:06.213", "references": [{"url": "https://blog.inhq.net/posts/yubico-libyubihsm-vuln2/#second-attack-variant-cve-pending", "tags": ["Exploit", "Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "https://blog.inhq.net/posts/yubico-libyubihsm-vuln2/#second-attack-variant-cve-pending", "tags": ["Exploit", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-190"}]}], "descriptions": [{"lang": "en", "value": "An issue was discovered in the _send_secure_msg() function of Yubico yubihsm-shell through 2.0.3. The function does not correctly validate the embedded length field of an authenticated message received from the device because response_msg.st.len=8 can be accepted but triggers an integer overflow, which causes CRYPTO_cbc128_decrypt (in OpenSSL) to encounter an undersized buffer and experience a segmentation fault. The yubihsm-shell project is included in the YubiHSM 2 SDK product."}, {"lang": "es", "value": "Se detect\u00f3 un problema en la funci\u00f3n _send_secure_msg() de Yubico yubihsm-shell versiones hasta 2.0.3. La funci\u00f3n no comprueba correctamente el campo de longitud insertado de un mensaje autenticado recibido del dispositivo porque response_msg.st.len=8 puede ser aceptado pero desencadena un desbordamiento de enteros, lo que causa a CRYPTO_cbc128_decrypt (en OpenSSL) encuentre un b\u00fafer de tama\u00f1o insuficiente y experimente un fallo de segmentaci\u00f3n. El proyecto yubihsm-shell est\u00e1 incluido en el producto YubiHSM 2 SDK"}], "lastModified": "2024-11-21T06:07:08.163", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:yubico:yubihsm-shell:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "9F7C9BAC-A77B-4333-A29C-4EABAF1B7003", "versionEndIncluding": "2.0.3"}], "operator": "OR"}]}], "sourceIdentifier": "cve@mitre.org"}