5.5

CVE-2021-37220: artifex mupdf Out-of-bounds Write

CVSS: 5.5v3.1MediumModified
AliasesUBUNTU-CVE-2021-37220DEBIAN-CVE-2021-37220
Published 21-07-2021Last modified 04-08-2024
Open JSON

Vulnerability summary

CVE-2021-37220 is a medium (CVSS 5.5) Out-of-bounds Write vulnerability in artifex mupdf. EPSS estimates a 1.33% chance of exploitation in the next 30 days, higher than 70.6% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
32/100
0100
Medium · default modelHow is this calculated?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
EPSS score
1.33%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference

Advisory lineage

Upstream 0 · Downstream 1 · Related 1
USN-7825-1

Timeline

  1. 21-07-2021
    PublishedVulnerability first disclosed.
  2. 04-08-2024
    Last modifiedVulnerability information updated.

Description

MuPDF through 1.18.1 has an out-of-bounds write because the cached color converter does not properly consider the maximum key size of a hash table. This can, for example, be seen with crafted "mutool draw" input.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

1.33%

Chance of exploitation in the next 30 days

Percentile

71%

Versus all other CVEs

30-day change

0.00 pp

From 1.33% on 19-09-2026

19-09-202619-10-2026
EPSS score
1.33%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • referenceUnverified

    Exploit Reference (bugs.ghostscript.com)

    Maturity: unknown

Weaknesses

CWE · root cause

Affected systems

Artifex1 product
Debian1 product
  • mupdf< 1.17.0+ds1-2
Fedoraproject1 product
Ubuntu1 product
  • mupdfAll versions (No fix recorded) | < 1.12.0+ds1-1ubuntu0.1~esm1 | < 1.16.1+ds1-1ubuntu1+esm1

4 vendors · 4 products

References

8 links