Information Exposure Affecting firefox package, versions <144.0.2-r0
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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Test your applications- Snyk IDSNYK-CHAINGUARDLATEST-FIREFOX-14887012
- published7 Jan 2026
- disclosed6 Sept 2016
Introduced: 6 Sep 2016
CVE-2016-7153 (opens in a new tab)How to fix?
Upgrade Chainguard firefox to version 144.0.2-r0 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 Chainguard.
See How to fix? for Chainguard relevant fixed versions and status.
The HTTP/2 protocol does not consider the role of the TCP congestion window in providing information about content length, which makes it easier for remote attackers to obtain cleartext data by leveraging a web-browser configuration in which third-party cookies are sent, aka a "HEIST" attack.
References
- http://arstechnica.com/security/2016/08/new-attack-steals-ssns-e-mail-addresses-and-more-from-https-pages/
- http://www.securityfocus.com/bid/92773
- http://www.securitytracker.com/id/1036741
- http://www.securitytracker.com/id/1036742
- http://www.securitytracker.com/id/1036743
- http://www.securitytracker.com/id/1036744
- http://www.securitytracker.com/id/1036745
- http://www.securitytracker.com/id/1036746
- https://tom.vg/papers/heist_blackhat2016.pdf