CVE-2020-14968

An issue was discovered in the jsrsasign package before 8.0.17 for Node.js. Its RSASSA-PSS (RSA-PSS) implementation does not detect signature manipulation/modification by prepending '\0' bytes to a signature (it accepts these modified signatures as valid). An attacker can abuse this behavior in an application by creating multiple valid signatures where only one signature should exist. Also, an attacker might prepend these bytes with the goal of triggering memory corruption issues.

CVSS v3.0 9.8 CRITICAL
CVSS v2.0 7.5 HIGH

9.8^/10

CVSS v3.0 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

7.5^/10

CVSS v2.0 : HIGH

Vector : AV:N/AC:L/Au:N/C:P/I:P/A:P

Exploitability : 10.0 / Impact : 6.4

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://github.com/kjur/jsrsasign/releases/tag/8.0.17	Release Notes Third Party Advisory
https://github.com/kjur/jsrsasign/issues/438	Exploit Third Party Advisory
https://github.com/kjur/jsrsasign/releases/tag/8.0.18	Release Notes Third Party Advisory
https://www.npmjs.com/package/jsrsasign	Product Third Party Advisory
https://kjur.github.io/jsrsasign/	Release Notes Third Party Advisory
https://security.netapp.com/advisory/ntap-20200724-0001/

Configurations

Configuration 1 (hide)

cpe:2.3:a:jsrsasign_project:jsrsasign:*:*:*:*:*:node.js:*:*

Information

Published : 2020-06-22 12:15

Updated : 2020-07-24 14:15

NVD link : CVE-2020-14968

Mitre link : CVE-2020-14968

JSON object : View

Products Affected

jsrsasign_project

jsrsasign

CWE

CWE-119

Improper Restriction of Operations within the Bounds of a Memory Buffer

{"cve": {"data_type": "CVE", "references": {"reference_data": [{"url": "https://github.com/kjur/jsrsasign/releases/tag/8.0.17", "name": "https://github.com/kjur/jsrsasign/releases/tag/8.0.17", "tags": ["Release Notes", "Third Party Advisory"], "refsource": "MISC"}, {"url": "https://github.com/kjur/jsrsasign/issues/438", "name": "https://github.com/kjur/jsrsasign/issues/438", "tags": ["Exploit", "Third Party Advisory"], "refsource": "MISC"}, {"url": "https://github.com/kjur/jsrsasign/releases/tag/8.0.18", "name": "https://github.com/kjur/jsrsasign/releases/tag/8.0.18", "tags": ["Release Notes", "Third Party Advisory"], "refsource": "MISC"}, {"url": "https://www.npmjs.com/package/jsrsasign", "name": "https://www.npmjs.com/package/jsrsasign", "tags": ["Product", "Third Party Advisory"], "refsource": "MISC"}, {"url": "https://kjur.github.io/jsrsasign/", "name": "https://kjur.github.io/jsrsasign/", "tags": ["Release Notes", "Third Party Advisory"], "refsource": "MISC"}, {"url": "https://security.netapp.com/advisory/ntap-20200724-0001/", "name": "https://security.netapp.com/advisory/ntap-20200724-0001/", "tags": [], "refsource": "CONFIRM"}]}, "data_format": "MITRE", "description": {"description_data": [{"lang": "en", "value": "An issue was discovered in the jsrsasign package before 8.0.17 for Node.js. Its RSASSA-PSS (RSA-PSS) implementation does not detect signature manipulation/modification by prepending '\\0' bytes to a signature (it accepts these modified signatures as valid). An attacker can abuse this behavior in an application by creating multiple valid signatures where only one signature should exist. Also, an attacker might prepend these bytes with the goal of triggering memory corruption issues."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "en", "value": "CWE-119"}]}]}, "data_version": "4.0", "CVE_data_meta": {"ID": "CVE-2020-14968", "ASSIGNER": "cve@mitre.org"}}, "impact": {"baseMetricV2": {"cvssV2": {"version": "2.0", "baseScore": 7.5, "accessVector": "NETWORK", "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "authentication": "NONE", "integrityImpact": "PARTIAL", "accessComplexity": "LOW", "availabilityImpact": "PARTIAL", "confidentialityImpact": "PARTIAL"}, "severity": "HIGH", "acInsufInfo": false, "impactScore": 6.4, "obtainAllPrivilege": false, "exploitabilityScore": 10.0, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}, "baseMetricV3": {"cvssV3": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.8, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 3.9}}, "publishedDate": "2020-06-22T12:15Z", "configurations": {"nodes": [{"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:a:jsrsasign_project:jsrsasign:*:*:*:*:*:node.js:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "8.0.17"}]}], "CVE_data_version": "4.0"}, "lastModifiedDate": "2020-07-24T14:15Z"}