Asymmetric denial of service - ReDoS

Asymmetric denial of service - ReDoS

Description

Within the source code there is evidence of the use of dangerous regular expressions, because they make use of complex operations to find matches, which can lead to an attacker sending a specific string of data that could cause the server to crash when evaluating the string with the dangerous regular expression.

Impact

Generate server crash.

Recommendation

Use optimized regular expressions to perform functions without much computational overhead.

Threat

Anonymous attacker from the Internet.

Expected Remediation Time

⌚ 60 minutes.

Score

Default score using CVSS 3.1. It may change depending on the context of the src.

Base

  • Attack vector: N
  • Attack complexity: L
  • Privileges required: N
  • User interaction: N
  • Scope: U
  • Confidentiality: N
  • Integrity: N
  • Availability: L

Temporal

  • Exploit code maturity: U
  • Remediation level: X
  • Report confidence: R

Result

  • Vector string: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:X/RC:R
  • Score:
    • Base: 5.3
    • Temporal: 4.7
  • Severity:
    • Base: Medium
    • Temporal: Medium

Score 4.0

Default score using CVSS 4.0. It may change depending on the context of the src.

Base 4.0

  • Attack vector: N
  • Attack complexity: L
  • Attack Requirements: N
  • Privileges required: N
  • User interaction: N
  • Confidentiality (VC): N
  • Integrity (VI): N
  • Availability (VA): L
  • Confidentiality (SC): N
  • Integrity (SI): N
  • Availability (SA): N

Threat 4.0

  • Exploit maturity: U

Result 4.0

  • Vector string: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U
  • Score:
    • CVSS-BT: 2.7
  • Severity:
    • CVSS-BT: Low

Requirements

Fixes

Free trial message
Free trial
Search for vulnerabilities in your apps for free with Fluid Attacks' automated security testing! Start your 21-day free trial and discover the benefits of the Continuous Hacking Essential plan. If you prefer the Advanced plan, which includes the expertise of Fluid Attacks' hacking team, fill out this contact form.