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No exploitation reportedFix available

CVE-2017-7813

No exploitation reported by the sources we read.

  • Published2018-06-11
  • WeaknessCWE-125 · CWE-704

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

Inside the JavaScript parser, a cast of an integer to a narrower type can result in data read from outside the buffer being parsed. This usually results in a non-exploitable crash, but can leak a limited amount of information from memory if it matches JavaScript identifier syntax. This vulnerability affects Firefox < 56.

Timeline

dates in UTC
  1. 2018-06-1121:29CVE publishedNVD

Versions per branch

NVD
Mozilla firefox
BranchAffectedFixed in
55.0≤ 55.0.3no fix published

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

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

  • firefoxUbuntu:18.04:LTSall versions · fixed in 56.0+build6-0ubuntu1
  • firefoxUbuntu:16.04:LTSall versions · fixed in 56.0+build6-0ubuntu0.16.04.1
  • firefoxUbuntu:14.04:LTSall versions · fixed in 56.0+build6-0ubuntu0.14.04.1
  • firefox-esropenSUSE:Tumbleweedall versions · fixed in 128.5.1-1.1
  • MozillaFirefoxopenSUSE:Tumbleweedall versions · fixed in 92.0-1.2
  • mozjs38Ubuntu:18.04:LTSall versions · no fixed version listed

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:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
Published
2018-06-11
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-3q69-c555-hw23

Frequently asked questions

What is CVE-2017-7813?

Inside the JavaScript parser, a cast of an integer to a narrower type can result in data read from outside the buffer being parsed. This usually results in a non-exploitable crash, but can leak a limited amount of information from memory if it matches JavaScript identifier syntax. This vulnerability affects Firefox < 56.

Is CVE-2017-7813 actively exploited?

Active exploitation of CVE-2017-7813 has not been confirmed. Its EPSS score was 1.6% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2017-7813?

CVE-2017-7813 has a CVSS v3 base score of 8.2 (HIGH severity), with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H.

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