firefox: Inside the JavaScript parser, a cast of an integer to a narrower type can result in data read from outside the buffer...
CVE-2017-7813 is fixed in 4 products on 1 platform, first by firefox 56.0+build6-0ubuntu1, released October 1, 2017. It is not reported as exploited. Patch Radar priority: Routine.
Inside the JavaScript parser, a cast of an integer to a narrower type can result in data read from outside the buffer being parsed. This usually results in a non-exploitable crash, but can leak a limited amount of information from memory if it matches JavaScript identifier syntax. This vulnerability affects Firefox < 56.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| firefox · Ubuntu 18.04.6 LTS (bionic) | 56.0+build6-0ubuntu1 | firefox 56.0+build6-0ubuntu1 | Oct 1, 2017 |
| firefox-globalmenu · Ubuntu 18.04.6 LTS (bionic) | 56.0+build6-0ubuntu1 | firefox-globalmenu 56.0+build6-0ubuntu1 | Oct 1, 2017 |
| firefox-mozsymbols · Ubuntu 18.04.6 LTS (bionic) | 56.0+build6-0ubuntu1 | firefox-mozsymbols 56.0+build6-0ubuntu1 | Oct 1, 2017 |
| firefox-testsuite · Ubuntu 18.04.6 LTS (bionic) | 56.0+build6-0ubuntu1 | firefox-testsuite 56.0+build6-0ubuntu1 | Oct 1, 2017 |
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