CVE-2016-7153

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 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.

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 Browser: 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/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
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

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