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Vulnerabilities

Vulnerability · CVE-2019-20907

ALAS-2025-1972 (medium): python26

Published Jul 13, 2020 · catalog updated Oct 14, 2026 · Amazon Amazon Linux

Check if you run it

No confirmed exploitation is on record for CVE-2019-20907. EPSS is 2.99%. Act only if a listed version of Amazon Amazon Linux is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High7.5
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
2.99%
Remediation
Advisory link
Affected products
cpe canonical/ubuntu linux · cpe debian/debian linux · cpe fedoraproject/fedora · cpe netapp/active iq unified manager · cpe opensuse/leap · cpe oracle/zfs storage appliance kit

In Lib/tarfile.py in Python through 3.8.3, an attacker is able to craft a TAR archive leading to an infinite loop when opened by tarfile.open, because _proc_pax lacks header validation.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe canonical/ubuntu linux12.04
  • cpe debian/debian linux9.0
  • cpe fedoraproject/fedora31
  • cpe netapp/active iq unified managerversion unspecified
  • cpe opensuse/leap15.1
  • cpe opensuse/leap15.2
  • cpe oracle/zfs storage appliance kit8.8
  • cpe python/pythonversion unspecified

How to fix CVE-2019-20907

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2019-20907. EPSS is 2.99%. Act only if a listed version of Amazon Amazon Linux is installed.

Which versions are affected?

Compare what you have installed with canonical/ubuntu linux 12.04; debian/debian linux 9.0; oracle/zfs storage appliance kit 8.8. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-835: Infinite Loop. EPSS 2.99%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Jul 13, 2020 · NIST NVD

    Detected

    In Lib/tarfile.py in Python through 3.8.3, an attacker is able to craft a TAR archive leading to an infinite loop when opened by tarfile.open, because _proc_pax lacks header validation.

  2. Oct 14, 2026 · NIST NVD

    Updated

    In Lib/tarfile.py in Python through 3.8.3, an attacker is able to craft a TAR archive leading to an infinite loop when opened by tarfile.open, because _proc_pax lacks header validation.

Sources

  • Amazon LinuxVendor advisoryCVE-2019-20907

    CVE-2019-18348, CVE-2019-20907

    alas.aws.amazon.com
  • CVE.orgVulnerability recordCVE-2019-20907

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2019-20907

    30-day exploitation probability 3.0%

    first.org
  • NIST NVDVulnerability recordCVE-2019-20907

    In Lib/tarfile.py in Python through 3.8.3, an attacker is able to craft a TAR archive leading to an infinite loop when opened by tarfile.open, because _proc_pax lacks header validation.

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 16, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.