CVE-2016-7152

Severity: medium (CVSS 5.3 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 12.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2016-09-06 · updated 2026-06-17
Weakness: CWE-200

Description

The HTTPS 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.

Affected products

Apple Safari: all versions
Google Chrome: all versions
Microsoft Edge: all versions
Microsoft Internet Explorer 11: all versions
Mozilla Firefox: all versions
Opera Software AS Opera for Android: all versions

References

http://arstechnica.com/security/2016/08/new-attack-steals-ssns-e-mail-addresses-and-more-from-https-pages/
http://www.securityfocus.com/bid/92769
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
http://arstechnica.com/security/2016/08/new-attack-steals-ssns-e-mail-addresses-and-more-from-https-pages/
http://www.securityfocus.com/bid/92769
http://www.securitytracker.com/id/1036741

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