jsrsasign Package up to 8.0.18 on node.js ECDSA Signature signature verification

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CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.4$0-$5k0.00

A vulnerability classified as critical was found in jsrsasign Package up to 8.0.18 on node.js (JavaScript Library). Affected by this vulnerability is an unknown functionality of the component ECDSA Signature Handler. The manipulation with an unknown input leads to a weak authentication vulnerability. The CWE definition for the vulnerability is CWE-347. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

An issue was discovered in the jsrsasign package through 8.0.18 for Node.js. It allows a malleability in ECDSA signatures by not checking overflows in the length of a sequence and '0' characters appended or prepended to an integer. The modified signatures are verified as valid. This could have a security-relevant impact if an application relied on a single canonical signature.

The weakness was presented 06/22/2020. This vulnerability is known as CVE-2020-14966 since 06/22/2020. The attack can be launched remotely. The exploitation doesn't need any form of authentication. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 10/26/2020).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

See 157125 and 157124 for similar entries.

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CPE 2.3infoedit

CPE 2.2infoedit

CVSSv3infoedit

VulDB Meta Base Score: 7.4
VulDB Meta Temp Score: 7.4

VulDB Base Score: 7.3
VulDB Temp Score: 7.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔒

CVSSv2infoedit

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

NVD Base Score: 🔒

Exploitinginfoedit

Class: Weak authentication
CWE: CWE-347
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfoedit

Threat: 🔍
Adversaries: 🔍
Geopolitics: 🔍
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Countermeasuresinfoedit

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfoedit

06/22/2020 Advisory disclosed
06/22/2020 +0 days CVE assigned
06/23/2020 +1 days VulDB entry created
10/26/2020 +125 days VulDB last update

Sourcesinfoedit

Status: Not defined
Confirmation: 🔒

CVE: CVE-2020-14966 (🔒)
See also: 🔒

Entryinfoedit

Created: 06/23/2020 09:46 AM
Updated: 10/26/2020 01:46 PM
Changes: (1) advisory_confirm_url
Complete: 🔍

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