Google Chrome prior 46.0.2490.71 PDF use after free

CVSS Meta Temp Score
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Current Exploit Price (≈)
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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.
6.4$5k-$25k0.00

Summaryinfo

A vulnerability has been found in Google Chrome and classified as critical. Affected is an unknown function of the component PDF Handler. The manipulation leads to use after free. This vulnerability is listed as CVE-2015-6756. There is no available exploit. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Google Chrome (Web Browser). This issue affects an unknown part of the component PDF Handler. The manipulation with an unknown input leads to a use after free vulnerability. Using CWE to declare the problem leads to CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. Impacted is confidentiality, integrity, and availability.

The weakness was presented 10/13/2015 by Muneaki Nishimura with OUSPG as Stable Channel Update, October 2015 as confirmed release notes (Website). The advisory is shared at googlechromereleases.blogspot.ch. The identification of this vulnerability is CVE-2015-6756 since 08/31/2015. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 06/21/2022). It is expected to see the exploit prices for this product increasing in the near future.

The vulnerability scanner Nessus provides a plugin with the ID 86486 (Debian DSA-3376-1 : chromium-browser - security update), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 175531 (Debian Security Update for chromium-browser (DSA 3376-1)).

Upgrading to version 46.0.2490.71 eliminates this vulnerability. The upgrade is hosted for download at chrome.google.com. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (107096), Tenable (86486), SecurityFocus (BID 77071†) and Vulnerability Center (SBV-53438†). See VDB-78084, VDB-78085, VDB-78472 and VDB-78474 for similar entries. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 6.4

VulDB Base Score: 7.3
VulDB Temp Score: 6.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Unproven

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 86486
Nessus Name: Debian DSA-3376-1 : chromium-browser - security update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 703376
OpenVAS Name: Debian Security Advisory DSA 3376-1 (chromium-browser - security update)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: Chrome 46.0.2490.71

Timelineinfo

08/31/2015 🔍
10/13/2015 +43 days 🔍
10/13/2015 +0 days 🔍
10/13/2015 +0 days 🔍
10/13/2015 +0 days 🔍
10/14/2015 +1 days 🔍
10/15/2015 +1 days 🔍
10/15/2015 +0 days 🔍
06/21/2022 +2441 days 🔍

Sourcesinfo

Vendor: google.com
Product: google.com

Advisory: Stable Channel Update, October 2015
Researcher: Muneaki Nishimura
Organization: OUSPG
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2015-6756 (🔍)
GCVE (CVE): GCVE-0-2015-6756
GCVE (VulDB): GCVE-100-78473

OVAL: 🔍

X-Force: 107096 - Google Chrome PDF code execution
SecurityFocus: 77071 - Google Chrome 46.0.2490.71 Multiple Security Vulnerabilities
SecurityTracker: 1033816
Vulnerability Center: 53438 - Google Chrome <46.0.2490.71 Remote Code Execution due to Use-After-Free in PDFium, Medium

See also: 🔍

Entryinfo

Created: 10/15/2015 12:16
Updated: 06/21/2022 22:26
Changes: 10/15/2015 12:16 (68), 02/13/2018 07:25 (12), 06/21/2022 22:16 (4), 06/21/2022 22:26 (1)
Complete: 🔍
Cache ID: 216:599:103

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

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