CVE-2020-13757

HIGH
7.5
CVSS Score
Published: June 1, 2020 at 06:17 PM UTC
Updated: June 17, 2026 at 02:53 AM UTC
3 products affected across 3 vendorsFedoraUbuntu LinuxPython Rsa

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Severity
HIGH7.5
Exploit prediction
EPSS 1%

Description

Python-RSA before 4.1 ignores leading '\0' bytes during decryption of ciphertext. This could conceivably have a security-relevant impact, e.g., by helping an attacker to infer that an application uses Python-RSA, or if the length of accepted ciphertext affects application behavior (such as by causing excessive memory allocation).

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 4.1
Affected range stops below 4.1, so it looks safe — our inference, not a vendor statement

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-327

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