source-map-js through 1.2.1 Event Loop Denial of Service
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.7epss 0.4%
exploitation probability
0.4%top 71% of all CVEs
observed exploitation
nono source reports it
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.
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
Affected products
7rulnik · source-map-jsReferences
https://github.com/7rulnik/source-map-jshttps://github.com/7rulnik/source-map-js/blob/c1cd8904bb7bd0c7fb5879fcda48134d82a27934/lib/source-node.js#L115-L118https://github.com/7rulnik/source-map-js/issues/76https://www.vulncheck.com/advisories/source-map-js-through-1.2.1-event-loop-denial-of-service