Mozilla Firefox 39 decrease_ref_count memory corruption

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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8.7$0-$5k0.00

Summaryinfo

A vulnerability marked as critical has been reported in Mozilla Firefox 39. This issue affects the function decrease_ref_count. The manipulation leads to memory corruption. This vulnerability is documented as CVE-2015-4486. There is not any exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Mozilla Firefox 39 (Web Browser) and classified as critical. This issue affects the function decrease_ref_count. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

The decrease_ref_count function in libvpx in Mozilla Firefox before 40.0 and Firefox ESR 38.x before 38.2 allows remote attackers to execute arbitrary code or cause a denial of service (out-of-bounds read) via malformed WebM video data.

The weakness was released 08/11/2015 as MFSA 2015-89 as confirmed security advisory (Website). The advisory is shared at mozilla.org. The identification of this vulnerability is CVE-2015-4486 since 06/10/2015. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 10/22/2024).

The vulnerability scanner Nessus provides a plugin with the ID 85336 (CentOS 5 / 6 / 7 : firefox (CESA-2015:1586)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CentOS Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 123849 (CentOS Security Update for firefox Security Update (CESA-2015:1586)).

Upgrading to version 40 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (105527), Tenable (85336), SecurityFocus (BID 76296†) and Vulnerability Center (SBV-51912†). Entries connected to this vulnerability are available at VDB-76999, VDB-77001, VDB-77075 and VDB-77077. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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Version

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 10.0
VulDB Meta Temp Score: 8.7

VulDB Base Score: 10.0
VulDB Temp Score: 8.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: 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: 85336
Nessus Name: CentOS 5 / 6 / 7 : firefox (CESA-2015:1586)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 80056
OpenVAS Name: Oracle Linux Local Check: ELSA-2015-1586
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: Firefox 40

Timelineinfo

06/10/2015 🔍
08/11/2015 +62 days 🔍
08/11/2015 +0 days 🔍
08/11/2015 +0 days 🔍
08/12/2015 +1 days 🔍
08/13/2015 +1 days 🔍
08/15/2015 +2 days 🔍
10/22/2024 +3356 days 🔍

Sourcesinfo

Vendor: mozilla.org
Product: mozilla.org

Advisory: MFSA 2015-89
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2015-4486 (🔍)
GCVE (CVE): GCVE-0-2015-4486
GCVE (VulDB): GCVE-100-77081
X-Force: 105527 - Mozilla Firefox decrease_ref_count buffer overflow
SecurityFocus: 76296
SecurityTracker: 1033247
Vulnerability Center: 51912 - Mozilla Firefox <40, Firefox ESR 38.2 Remote DoS in Libvpx in decrease_ref_count, Medium

See also: 🔍

Entryinfo

Created: 08/13/2015 11:13
Updated: 10/22/2024 22:28
Changes: 08/13/2015 11:13 (68), 10/05/2017 18:23 (6), 06/09/2022 13:19 (2), 06/09/2022 13:25 (1), 10/22/2024 22:28 (15)
Complete: 🔍
Cache ID: 216:D8C:103

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

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