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CVE-2020-13757

Published: 1 June 2020

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).

Priority

Medium

Cvss 3 Severity Score

7.5

Score breakdown

Status

Package Release Status
python-rsa
Launchpad, Ubuntu, Debian
bionic
Released (3.4.2-1ubuntu0.1~esm1)
Available with Ubuntu Pro
eoan Ignored
(end of life)
focal
Released (4.0-3ubuntu0.1~esm1)
Available with Ubuntu Pro
groovy Ignored
(end of life)
hirsute Ignored
(end of life)
impish Ignored
(end of life)
jammy Not vulnerable
(4.8-1)
kinetic Not vulnerable
(4.8-1)
lunar Not vulnerable
(4.8-1)
mantic Not vulnerable
(4.8-1)
trusty
Released (3.1.2-1ubuntu0.1+esm1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
upstream
Released (4.1)
xenial
Released (3.2.3-1.1ubuntu0.1~esm1)
Available with Ubuntu Pro

Severity score breakdown

Parameter Value
Base score 7.5
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact None
Availability impact None
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N