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TI-2020-12521 Aliases CVE-2020-15904GHSA-f8m3-jpxr-hm5x

A buffer overflow in the patching routine of bsdiff4 before 1.2.0 allows an attacker to…

Priority LOW 36CWE-787Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-787 and the CVSS impact.

Summary

A buffer overflow in the patching routine of bsdiff4 before 1.2.0 allows an attacker to write to heap memory (beyond allocated bounds) via a crafted patch file.

Why it matters now

EPSS 0.0105 64th percentileScored 2026-11-08
Fix Fixed bsdiff4 (PyPI): 1.2.0

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
—bsdiff4 (PyPI)before 1.2.01.2.0Patch availableGHSA-f8m3-jpxr-hm5x
  • — Vendor— Affected all versions Fixed in — No fix listed CNA
  • bsdiff4 (PyPI) Vendor— Affected before 1.2.0 Fixed in 1.2.0 Patch available GHSA-f8m3-jpxr-hm5x

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:pypi:bsdiff4:*:*:*:*:*:*:*:*before 1.2.0VulnerablePypi
  • cpe:2.3:a:pypi:bsdiff4:*:*:*:*:*:*:*:* Versions before 1.2.0 Vulnerable ·Pypi

Remediation

  • Fix · GHSA-f8m3-jpxr-hm5x bsdiff4 (PyPI) Fixed in 1.2.0 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-15904
  2. 2026-10-03 Alias added: GHSA-f8m3-jpxr-hm5x

References

Patch 1

Advisory 2

Other 3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences