CVE-2022-31129

moment is a JavaScript date library for parsing, validating, manipulating, and formatting dates. Affected versions of moment were found to use an inefficient parsing algorithm. Specifically using string-to-date parsing in moment (more specifically rfc2822 parsing, which is tried by default) has quadratic (N^2) complexity on specific inputs. Users may notice a 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. The problem is patched in 2.29.4, the patch can be applied to all affected versions with minimal tweaking. Users are advised to upgrade. Users unable to upgrade should consider limiting date lengths accepted from user input.

Weakness

The product does not properly control the allocation and maintenance of a limited resource.

Affected Software

Potential Mitigations

• Mitigation of resource exhaustion attacks requires that the target system either:

• The first of these solutions is an issue in itself though, since it may allow attackers to prevent the use of the system by a particular valid user. If the attacker impersonates the valid user, they may be able to prevent the user from accessing the server in question.

• The second solution is simply difficult to effectively institute – and even when properly done, it does not provide a full solution. It simply makes the attack require more resources on the part of the attacker.

Related Attack Patterns

• https://cwe.mitre.org/data/definitions/147.html
• https://cwe.mitre.org/data/definitions/227.html
• https://cwe.mitre.org/data/definitions/492.html

References

• https://github.com/moment/moment/commit/9a3b5894f3d5d602948ac8a02e4ee528a49ca3a3
• https://github.com/moment/moment/pull/6015#issuecomment-1152961973
• https://github.com/moment/moment/security/advisories/GHSA-wc69-rhjr-hc9g
• https://huntr.dev/bounties/f0952b67-f2ff-44a9-a9cd-99e0a87cb633/
• https://lists.debian.org/debian-lts-announce/2023/01/msg00035.html
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6QIO6YNLTK2T7SPKDS4JEL45FANLNC2Q/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IWY24RJA3SBJGA5N4CU4VBPHJPPPJL5O/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ORJX2LF6KMPIHP6B2P6KZIVKMLE3LVJ5/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZMX5YHELQVCGKKQVFXIYOTBMN23YYSRO/
• https://security.netapp.com/advisory/ntap-20221014-0003/
• https://github.com/moment/moment/commit/9a3b5894f3d5d602948ac8a02e4ee528a49ca3a3
• https://github.com/moment/moment/pull/6015#issuecomment-1152961973
• https://github.com/moment/moment/security/advisories/GHSA-wc69-rhjr-hc9g
• https://huntr.dev/bounties/f0952b67-f2ff-44a9-a9cd-99e0a87cb633/
• https://lists.debian.org/debian-lts-announce/2023/01/msg00035.html
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6QIO6YNLTK2T7SPKDS4JEL45FANLNC2Q/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IWY24RJA3SBJGA5N4CU4VBPHJPPPJL5O/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ORJX2LF6KMPIHP6B2P6KZIVKMLE3LVJ5/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZMX5YHELQVCGKKQVFXIYOTBMN23YYSRO/
• https://security.netapp.com/advisory/ntap-20221014-0003/