Attacker Value
Moderate
(1 user assessed)
Exploitability
Very High
(1 user assessed)
User Interaction
None
Privileges Required
None
Attack Vector
Network
2

CVE-2022-31129

Disclosure Date: July 06, 2022 •
CVE-2022-31129 CVSS v3 Base Score: 7.5
Exploited in the Wild
Reported by 3dcyber
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Execution
Techniques
Validation
Validated
Validated
Validated
Impact
Techniques
Validation
Validated
Initial Access
Techniques
Validation
Validated

Description

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.

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1
Ratings
  • Attacker Value
    Medium
  • Exploitability
    Very High
Easy to weaponizeUnauthenticatedVulnerable in default configurationNo useful access
Technical Analysis

This vulnerability causes a denial of service in applications that use the moment library in the vulnerable versions.

  • When it is a javascript application on node.js, the impact of the vulnerability is greater.

  • When the application only loads or uses the library on the frontend, the impact is less since the denial of service is local to the browser.

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CVSS V3 Severity and Metrics
Base Score:
7.5 High
Impact Score:
3.6
Exploitability Score:
3.9
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector (AV):
Network
Attack Complexity (AC):
Low
Privileges Required (PR):
None
User Interaction (UI):
None
Scope (S):
Unchanged
Confidentiality (C):
None
Integrity (I):
None
Availability (A):
High

General Information

Offensive Application
Unknown
Utility Class
Unknown
Ports
Unknown
OS
Unknown
Vulnerable Versions
moment >= 2.18.0, < 2.29.4
Prerequisites
Unknown
Discovered By
Unknown
PoC Author
Unknown
Metasploit Module
Unknown
Reporter
Unknown

Vendors

  • debian,
  • fedoraproject,
  • momentjs

Products

  • debian linux 10.0,
  • fedora 35,
  • fedora 36,
  • fedora 37,
  • moment

Exploited in the Wild

Reported by:
Technical Analysis