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Public proof of conceptFix available

CVE-2021-33797

A public proof of concept exists; no exploitation attested.

  • Published2023-04-17
  • WeaknessCWE-119 · CWE-190

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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.

Timeline

dates in UTC
  1. 2023-04-1722:15CVE publishedNVD

Versions per branch

NVD
Artifex mujs
BranchAffectedFixed in
1.x≥ 1.0.1, ≤ 1.1.1no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Products declared by the CNA1 product

As fedora, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • mujs
    Affected
    • = mujs in versions 1.0.1 to 1.1.1no fix stated

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2023-04-17

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • mujsDebian:14all versions · fixed in 1.1.3-2
  • mujsDebian:13all versions · fixed in 1.1.3-2
  • mujsDebian:12all versions · fixed in 1.1.3-2

Full record on NVD

Fix

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
2023-04-17
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-cm79-jwwm-5h7h

Frequently asked questions

What is 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.

Is CVE-2021-33797 actively exploited?

A proof-of-concept exploit exists for CVE-2021-33797, but active exploitation has not been confirmed at this time.

What is the CVSS score for CVE-2021-33797?

CVE-2021-33797 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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Sources for this record