Out-of-bounds Read Affecting firefox package, versions <56.0+build6-0ubuntu1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published11 Jun 2018
- disclosed11 Jun 2018
Introduced: 11 Jun 2018
CVE-2017-7813 (opens in a new tab)How to fix?
Upgrade Ubuntu:21.04 firefox to version 56.0+build6-0ubuntu1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream firefox package and not the firefox package as distributed by Ubuntu.
See How to fix? for Ubuntu:21.04 relevant fixed versions and status.
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.
References
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2017-7813
- https://security-tracker.debian.org/tracker/CVE-2017-7813
- https://www.mozilla.org/security/advisories/mfsa2017-21/
- https://bugzilla.mozilla.org/show_bug.cgi?id=1383951
- http://www.securityfocus.com/bid/101057
- http://www.securitytracker.com/id/1039465