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CVE-2021-23975 PUBLISHED

The developer page about:memory has a Measure function for exploring what object types the browser has allocated and their sizes. When this function was invoked we incorrectly called the sizeof function, instead of using the API method that checks for invalid pointers. This vulnerability affects Firefox < 86.

EPSS 0.29% · 51.8th percentile

Risk Scores

EPSS Score
0.29%
51.8th percentile

Affected Products

VendorProductVersions
Ubuntu:18.04:LTSmozjs520, 52.9.1-0ubuntu0.18.04.1, 52.8.1-0ubuntu0.18.04.1
Ubuntu:22.04:LTSmozjs7878.15.0-4ubuntu1, 78.15.0-2, 78.13.0-1
Ubuntu:18.04:LTSfirefox71.0+build5-0ubuntu0.18.04.1, 0, 56.0+build6-0ubuntu1
Ubuntu:20.04:LTSfirefox85.0.1+build1-0ubuntu0.20.04.1, 84.0.2+build1-0ubuntu0.20.04.1, 84.0.1+build1-0ubuntu0.20.04.1
Ubuntu:16.04:LTSfirefox0, 69.0.2+build1-0ubuntu0.16.04.1, 70.0.1+build1-0ubuntu0.16.04.1
Ubuntu:20.04:LTSmozjs5252.9.1-1ubuntu3, 52.9.1-1build1, 0
Ubuntu:18.04:LTSmozjs380, 38.8.0~repack1-0ubuntu4, 38.8.0~repack1-0ubuntu3
Ubuntu:20.04:LTSmozjs6868.5.0-1~fakesync, 68.5.0-2~fakesync, 68.6.0-1

Timeline

References

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