What is CVE-2020-15904?

CVE-2020-15904 is a high-severity vulnerability in Pypi Bsdiff4, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2020-07-22.

How severe is CVE-2020-15904?

High severity. CVSS v3 base score is 7.8 out of 10.

Is CVE-2020-15904 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in Pypi Bsdiff4

CVE-2020-15904

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.

Vulnerability class: Buffer Overflow

EPSS: 0.011 (60.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

Affected products

Pypi Bsdiff4
N/a — versions n/a

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

Public proof-of-concept exploits

risicle/cpytraceafl

References

cve@mitre.org (Patch, Third Party Advisory, x_refsource_MISC)
cve@mitre.org (Third Party Advisory, x_refsource_MISC, Release Notes)

Frequently asked questions

What is CVE-2020-15904?: CVE-2020-15904 is a high-severity vulnerability in Pypi Bsdiff4, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2020-07-22.
How severe is CVE-2020-15904?: High severity. CVSS v3 base score is 7.8 out of 10.
Is CVE-2020-15904 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.