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Advisories

source-map-js through 1.2.1 Event Loop Denial of Service

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severity
high
date
Affecting

  • source-map-js <= 1.2.1

CWE
  • CWE-1284 Improper Validation of Specified Quantity in Input
CVSS
8.7
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Credit
Wayde Shi (PayPal Cyber Security Team)
Description
source-map-js through 1.2.1 fails to validate the per-section offset line value in indexed source maps, allowing attackers to specify arbitrary numeric values. Attackers can supply extremely large offset line values that cause synchronous event loop blocking for extended periods, preventing the service from handling other requests.

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