Opera Web Browser HTTPS HEIST information disclosure

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
4.7$0-$5k0.00

Summaryinfo

A vulnerability has been found in Opera Web Browser and classified as problematic. This affects an unknown function of the component HTTPS Handler. This manipulation causes information disclosure (HEIST). This vulnerability is tracked as CVE-2016-7152. The attack is possible to be carried out remotely. No exploit exists. This vulnerability has a historic impact because of its background and how it was received. It is advisable to use the suggested workaround.

Detailsinfo

A vulnerability classified as problematic was found in Opera Web Browser (Web Browser) (the affected version unknown). Affected by this vulnerability is an unknown part of the component HTTPS Handler. The manipulation with an unknown input leads to a information disclosure vulnerability (HEIST). The CWE definition for the vulnerability is CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. As an impact it is known to affect confidentiality. The summary by CVE is:

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.

The weakness was disclosed 08/03/2016 by Mathy Vanhoef and Tom Van Goethem with iMinds-DistriNet as HEIST: HTTP Encrypted Information can be Stolen through TCP-windows as confirmed paper (Blackhat). The advisory is shared at blackhat.com. The public release happened without involvement of Opera. This vulnerability is known as CVE-2016-7152 since 09/06/2016. The exploitation appears to be difficult. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 09/08/2025). MITRE ATT&CK project uses the attack technique T1592 for this issue. Due to its background and reception, this vulnerability has a historic impact.

The vulnerability scanner Nessus provides a plugin with the ID 261330 (Linux Distros Unpatched Vulnerability : CVE-2016-7152), which helps to determine the existence of the flaw in a target environment.

The best possible mitigation is suggested to be Workaround.

The vulnerability is also documented in the databases at Tenable (261330) and SecurityFocus (BID 92769†). Additional details are provided at arstechnica.com. The entries VDB-91292, VDB-91293, VDB-91294 and VDB-91295 are pretty similar. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Vendor

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.8
VulDB Meta Temp Score: 4.7

VulDB Base Score: 4.3
VulDB Temp Score: 4.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.3
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Name: HEIST
Class: Information disclosure / HEIST
CWE: CWE-200 / CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Nessus ID: 261330
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2016-7152

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Workaround
Status: 🔍

0-Day Time: 🔍

Timelineinfo

08/03/2016 🔍
09/06/2016 +34 days 🔍
09/06/2016 +0 days 🔍
09/06/2016 +0 days 🔍
09/07/2016 +1 days 🔍
09/08/2025 +3288 days 🔍

Sourcesinfo

Vendor: opera.com

Advisory: HEIST: HTTP Encrypted Information can be Stolen through TCP-windows
Researcher: Mathy Vanhoef, Tom Van Goethem
Organization: iMinds-DistriNet
Status: Confirmed

CVE: CVE-2016-7152 (🔍)
GCVE (CVE): GCVE-0-2016-7152
GCVE (VulDB): GCVE-100-91297
SecurityFocus: 92769 - HTTPS CVE-2016-7152 Information Disclosure Vulnerability
SecurityTracker: 1036741

Misc.: 🔍
See also: 🔍

Entryinfo

Created: 09/07/2016 11:07
Updated: 09/08/2025 20:21
Changes: 09/07/2016 11:07 (53), 04/22/2019 10:53 (9), 09/15/2022 07:31 (2), 09/15/2022 07:37 (11), 09/08/2025 20:21 (16)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Do you want to use VulDB in your project?

Use the official API to access entries easily!