7.5

CVE-2020-13757: canonical ubuntu_linux

Modified
AliasesMGASA-2020-0364SUSE-SU-2021:2008-1SUSE-SU-2021:2237-1
Published 01-06-2020Last modified 04-08-2024

Vulnerability summary

CVE-2020-13757 is a high (CVSS 7.5) vulnerability in canonical ubuntu_linux. EPSS estimates a 1.43% chance of exploitation in the next 30 days, higher than 73% of scored vulnerabilities. 1 public exploit is recorded.

Priority
Prioritisepublic exploit

Public exploit (GitHub, Date unknown)

Source freshness unavailable

How is this decided?
CVSS score
7.5/10
010
High · v3.1 (NVD)
EPSS score
1.43%
0%100%
Low · +0.03 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits1github

Advisory lineage

Upstream 0 · Downstream 5 · Related 3
OPENSUSE-SU-2024:11269-1OPENSUSE-SU-2024:14163-1OPENSUSE-SU-2026:12041-1RHSA-2020:3453RHSA-2020:3541

Timeline

  1. 01-06-2020
    PublishedVulnerability first disclosed.
  2. 04-08-2024
    Last modifiedVulnerability information updated.

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).

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

1.43%

Chance of exploitation in the next 30 days

Percentile

73%

Versus all other CVEs

30-day change

Increase +0.03 pp

From 1.40% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

1 found
  • githubUnverified

    Python Rsa

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Suse21 products
  • python-rsa&distro=HPE Helion OpenStack 8< 3.4.2-3.3.1
  • python-rsa&distro=SUSE Enterprise Storage 6< 3.4.2-3.4.1
  • python-rsa&distro=SUSE Linux Enterprise High Performance Computing 15 SP1-ESPOS< 3.4.2-3.4.1
  • python-rsa&distro=SUSE Linux Enterprise High Performance Computing 15 SP1-LTSS< 3.4.2-3.4.1
  • python-rsa&distro=SUSE Linux Enterprise Module for Basesystem 15 SP2< 3.4.2-3.4.1
Opensuse2 products
  • python-rsa&distro=openSUSE Leap 15.2< 3.4.2-lp152.4.3.1
  • python-rsa&distro=openSUSE Leap 15.3< 3.4.2-3.4.1
Canonical1 product
Debian1 product
  • python-rsa< 4.7.2-1
Fedoraproject1 product
Mageia1 product
  • python-rsa< 4.0-1.1.mga7
PyPI1 product
  • rsa< 4.1
Python-rsa_project1 product
Ubuntu1 product
  • python-rsa< 3.1.2-1ubuntu0.1+esm1 | < 3.2.3-1.1ubuntu0.1~esm1 | < 3.4.2-1ubuntu0.1~esm1 | < 4.0-3ubuntu0.1~esm1

9 vendors · 30 products

References

30 links
Show all 30 references