Buffer overflow in Artifex Mujs

CVE-2021-33797

Buffer-overflow in jsdtoa.c in Artifex MuJS in versions 1.0.1 to 1.1.1. An integer overflow happens when js_strtod() reads in floating point exponent, which leads to a buffer overflow in the pointer *d.

Vulnerability class: Buffer Overflow

EPSS: 0.008 (52.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

  • Artifex Mujs
  • N/a Mujs — versions mujs in versions 1.0.1 to 1.1.1

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2021-33797?
CVE-2021-33797 is a critical-severity vulnerability in Artifex Mujs, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 9.8/10. Published 2023-04-17.
How severe is CVE-2021-33797?
Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2021-33797 known to be exploited?
1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.