high
7.5
CWE
1333 400
Advisory Published
Advisory Published
Updated

CVE-2022-31129: Inefficient Regular Expression Complexity in moment

First published: Wed Jul 06 2022(Updated: )

### Impact * using string-to-date parsing in moment (more specifically rfc2822 parsing, which is tried by default) has quadratic (N^2) complexity on specific inputs * noticeable slowdown is observed with inputs above 10k characters * users who pass user-provided strings without sanity length checks to moment constructor are vulnerable to (Re)DoS attacks ### Patches The problem is patched in 2.29.4, the patch can be applied to all affected versions with minimal tweaking. ### Workarounds In general, given the proliferation of ReDoS attacks, it makes sense to limit the length of the user input to something sane, like 200 characters or less. I haven't seen legitimate cases of date-time strings longer than that, so all moment users who do pass a user-originating string to constructor are encouraged to apply such a rudimentary filter, that would help with this but also most future ReDoS vulnerabilities. ### References There is an excellent writeup of the issue here: https://github.com/moment/moment/pull/6015#issuecomment-1152961973= ### Details The issue is rooted in the code that removes legacy comments (stuff inside parenthesis) from strings during rfc2822 parsing. `moment("(".repeat(500000))` will take a few minutes to process, which is unacceptable.

Credit: security-advisories@github.com security-advisories@github.com security-advisories@github.com

Affected SoftwareAffected VersionHow to fix
Momentjs Moment>=2.18.0<2.29.4
Momentjs Moment>=2.18.0<2.29.4
Fedoraproject Fedora=35
Fedoraproject Fedora=36
Fedoraproject Fedora=37
Debian Debian Linux=10.0
redhat/servicemesh-prometheus<0:2.14.0-18.el8.1
0:2.14.0-18.el8.1
redhat/servicemesh-prometheus<0:2.23.0-9.el8
0:2.23.0-9.el8
redhat/ceph<2:17.2.6-70.el9c
2:17.2.6-70.el9c
redhat/grafana<0:5.2.4-6.el7
0:5.2.4-6.el7
redhat/rh-sso7-keycloak<0:18.0.6-1.redhat_00001.1.el7
0:18.0.6-1.redhat_00001.1.el7
redhat/rh-sso7-keycloak<0:18.0.6-1.redhat_00001.1.el8
0:18.0.6-1.redhat_00001.1.el8
redhat/rh-sso7-keycloak<0:18.0.6-1.redhat_00001.1.el9
0:18.0.6-1.redhat_00001.1.el9
redhat/cockpit-ovirt<0:0.16.2-1.el8e
0:0.16.2-1.el8e
redhat/ovirt-engine-ui-extensions<0:1.3.5-1.el8e
0:1.3.5-1.el8e
nuget/Moment.js>=2.18.0<2.29.4
2.29.4
npm/moment>=2.18.0<2.29.4
2.29.4
redhat/moment<2.29.4
2.29.4
IBM Cognos Analytics<=12.0.0-12.0.2
IBM Cognos Analytics<=11.2.0-11.2.4 FP3
debian/node-moment
2.29.1+ds-2+deb11u2
2.29.4+ds-1

Remedy

https://github.com/moment/moment/commit/9a3b5894f3d5d602948ac8a02e4ee528a49ca3a3

Remedy

https://github.com/moment/moment/pull/6015#issuecomment-1152961973

Remedy

https://huntr.dev/bounties/f0952b67-f2ff-44a9-a9cd-99e0a87cb633/

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is CVE-2022-31129?

    CVE-2022-31129 is a vulnerability in the Moment.js package that allows an attacker to craft a user-provided string that can cause the parsing algorithm to become inefficient, potentially leading to denial of service.

  • How does CVE-2022-31129 affect moment.js?

    CVE-2022-31129 affects affected versions of moment.js, specifically those that use an inefficient parsing algorithm when handling user-provided strings.

  • What is the severity of CVE-2022-31129?

    CVE-2022-31129 has a severity rating of high, with a CVSS score of 7.5.

  • How do I fix CVE-2022-31129?

    To fix CVE-2022-31129, upgrade to version 2.29.4 of the moment.js package.

  • Where can I find more information about CVE-2022-31129?

    More information about CVE-2022-31129 can be found in the following references: [GitHub Commit](https://github.com/moment/moment/commit/9a3b5894f3d5d602948ac8a02e4ee528a49ca3a3), [GitHub Pull Request](https://github.com/moment/moment/pull/6015#issuecomment-1152961973), [GitHub Security Advisory](https://github.com/moment/moment/security/advisories/GHSA-wc69-rhjr-hc9g).

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