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CVE-2020-1747: fedoraproject fedora Improper Input Validation

CVSS: 10.0v2.0HighModified
AliasesALPINE-CVE-2020-1747MGASA-2020-0155SUSE-SU-2020:0959-1
Published 24-03-2020Last modified 04-08-2024
Open JSON

Vulnerability summary

CVE-2020-1747 is a high (CVSS 10.0) Improper Input Validation vulnerability in fedoraproject fedora. EPSS estimates a 5.44% chance of exploitation in the next 30 days, higher than 92.6% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
10.0/10
010
High · v2.0 (NVD)
EPSS score
5.44%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 2 · Related 1
RHSA-2020:4641SUSE-SU-2022:2841-1

Timeline

  1. 24-03-2020
    PublishedVulnerability first disclosed.
  2. 04-08-2024
    Last modifiedVulnerability information updated.

Description

A vulnerability was discovered in the PyYAML library in versions before 5.3.1, where it is susceptible to arbitrary code execution when it processes untrusted YAML files through the full_load method or with the FullLoader loader. Applications that use the library to process untrusted input may be vulnerable to this flaw. An attacker could use this flaw to execute arbitrary code on the system by abusing the python/object/new constructor.

CVSS metrics

8 scores · 6 sources · 3 versions

EPSS trend

Probability

5.44%

Chance of exploitation in the next 30 days

Percentile

93%

Versus all other CVEs

30-day change

0.00 pp

From 5.44% on 19-09-2026

19-09-202619-10-2026
EPSS score
5.44%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Suse24 products
  • python-PyYAML&distro=HPE Helion OpenStack 8< 5.1.2-26.12.1
  • python-PyYAML&distro=SUSE Enterprise Storage 5< 5.1.2-26.12.1
  • python-PyYAML&distro=SUSE Linux Enterprise High Availability Extension 12 SP1< 5.1.2-26.12.1
  • python-PyYAML&distro=SUSE Linux Enterprise High Availability Extension 12 SP2< 5.1.2-26.12.1
  • python-PyYAML&distro=SUSE Linux Enterprise Module for Advanced Systems Management 12< 5.1.2-26.12.1
Opensuse2 products
  • leapEOL15.1
  • python-PyYAML&distro=openSUSE Leap 15.1< 5.1.2-lp151.2.6.1 | < 5.1.2-lp151.2.13.1
Alpine1 product
  • py3-yaml< 5.3.1-r0
Debian1 product
  • pyyaml< 5.3-2
Fedoraproject1 product
Mageia1 product
  • python-yaml< 5.3.1-1.mga7
Oracle1 product
PyPI1 product
  • pyyaml≥ 5.1b7, < 5.3.1 | ≥ 5.1, < 5.3.1
Pyyaml1 product
Red hat1 product
Ubuntu1 product
  • pyyaml< 5.3-2

11 vendors · 35 products

References

40 links
Show all 40 references