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Fencer Intel
high 7.5

CVE-2017-18077 json

ReDoS in brace-expansion

published 8y ago modified 4mo ago also GHSA-832h-xg76-4gv6 , EUVD-2018-0155

cvss
7.5
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.6%
EPSS 2.6% chance of exploitation in 30 days, percentile 85%
public exploits
0
none known

Summary

index.js in brace-expansion before 1.1.7 is vulnerable to Regular Expression Denial of Service (ReDoS) attacks, as demonstrated by an expand argument containing many comma characters.

Patch / fix

  • npm brace-expansion 1.1.7
  • brace_expansion_project brace_expansion 1.1.7
  • node-brace-expansion Debian 14, Debian 13, Debian 12 1.1.8-1

debian advisories DEBIAN-CVE-2017-18077

  • rh-nodejs8-nodejs RHEL 3 SOFTWARE_COLLECTIONS 8.17.0-2.el7
  • rh-nodejs8-npm RHEL 3 SOFTWARE_COLLECTIONS 6.13.4-8.17.0.2.el7

red hat advisories RHSA-2020:2625

Is CVE-2017-18077 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2017-18077 updated cvss 5.3

nodejs-brace-expansion: Regular expression denial of service

  • Red Hat Mobile Application Platform 4 fh-aaa Red Hat OpenShift Enterprise 3 nodejs-brace-expansion
    affected: no fix planned “Will not fix”
  • Red Hat Quay 3 quay/quay-rhel8
    affected: no fix available “Fix deferred”
  • Red Hat Software Collections rh-nodejs4-nodejs-brace-expansion, rh-nodejs6-nodejs-brace-expansion, rh-nodejs8-nodejs-brace-expansion
    affected: no fix available, no fix planned “Will not fix”
  • Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7) rh-nodejs8-nodejs 8.17.0-2.el7, rh-nodejs8-npm 6.13.4-8.17.0.2.el7 Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.6) rh-nodejs8-nodejs 8.17.0-2.el7, rh-nodejs8-npm 6.13.4-8.17.0.2.el7 Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.7) rh-nodejs8-nodejs 8.17.0-2.el7, rh-nodejs8-npm 6.13.4-8.17.0.2.el7 Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7) rh-nodejs8-nodejs 8.17.0-2.el7, rh-nodejs8-npm 6.13.4-8.17.0.2.el7
    fixed: vendor fix RHSA-2020:2625

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

2.58% chance of exploitation in the next 30 days, higher than 85% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • github.com https://github.com/juliangruber/brace-expansion/issues/33 referenced PoC, tagged "exploit" by a source, unverified
  • nodesecurity.io https://nodesecurity.io/advisories/338 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.0 7.5 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P
GitHub 3.0 7.5 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
npm brace-expansion
<1.1.7
1.1.7

Classification

Weakness
  • CWE-20 Improper Input Validation
  • CWE-1333 Inefficient Regular Expression Complexity

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.