// For flags

CVE-2020-13895

 

Severity Score

8.8
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

Crypt::Perl::ECDSA in the Crypt::Perl (aka p5-Crypt-Perl) module before 0.32 for Perl fails to verify correct ECDSA signatures when r and s are small and when s = 1. This happens when using the curve secp256r1 (prime256v1). This could conceivably have a security-relevant impact if an attacker wishes to use public r and s values when guessing whether signature verification will fail.

La función Crypt::Perl::ECDSA en el módulo Crypt::Perl (también se conoce como p5-Crypt-Perl) versiones anteriores a 0.32 para Perl, no puede verificar las firmas correctas ECDSA cuando r y s son pequeñas y cuando s = 1. Esto se presenta cuando se usa la curva secp256r1 (prime256v1). Esto podría tener un impacto relevante para la seguridad si un atacante desea utilizar los valores r y s públicos cuando adivina si la verificación de firma presentará un fallo

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Network
Attack Complexity
Medium
Authentication
None
Confidentiality
Partial
Integrity
Partial
Availability
Partial
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2020-06-07 CVE Reserved
  • 2020-06-07 CVE Published
  • 2023-03-07 EPSS Updated
  • 2024-08-04 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-347: Improper Verification of Cryptographic Signature
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
P5-crypt-perl Project
Search vendor "P5-crypt-perl Project"
 P5-crypt-perl
Search vendor "P5-crypt-perl Project" for product "P5-crypt-perl"
 < 0.32
Search vendor "P5-crypt-perl Project" for product "P5-crypt-perl" and version " < 0.32"
perl
Affected