libEBML up to 1.3.2 EbmlMaster::Read use after free

CVSS Meta Temp Score
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CTI Interest Score
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9.4$0-$5k0.00

Summaryinfo

A vulnerability has been found in libEBML up to 1.3.2 and classified as critical. This impacts the function EbmlMaster::Read. Performing a manipulation results in use after free. This vulnerability is reported as CVE-2015-8789. The attack is possible to be carried out remotely. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in libEBML up to 1.3.2. It has been classified as very critical. This affects the function EbmlMaster::Read. The manipulation with an unknown input leads to a use after free vulnerability. CWE is classifying the issue as CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

Use-after-free vulnerability in the EbmlMaster::Read function in libEBML before 1.3.3 allows context-dependent attackers to have unspecified impact via a "deeply nested element with infinite size" followed by another element of an upper level in an EBML document.

The weakness was disclosed 01/29/2016 by Aleksandar Nikolic with Cisco Talos (Website). It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2015-8789 since 01/29/2016. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 07/06/2022).

The vulnerability scanner Nessus provides a plugin with the ID 96993 (FreeBSD : libebml -- multiple vulnerabilities (a130bd8c-eafe-11e6-9ac1-a4badb2f4699)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family FreeBSD Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 175694 (Debian Security Update for libebml (DSA 3538-1)).

Upgrading to version 1.3.3 eliminates this vulnerability. A possible mitigation has been published 2 years after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (96993) and SecurityFocus (BID 94924†). The entries VDB-80728, VDB-80729 and VDB-95054 are pretty similar. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.6
VulDB Meta Temp Score: 9.4

VulDB Base Score: 9.6
VulDB Temp Score: 9.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.6
NVD Vector: 🔍

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: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 96993
Nessus Name: FreeBSD : libebml -- multiple vulnerabilities (a130bd8c-eafe-11e6-9ac1-a4badb2f4699)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 703538
OpenVAS Name: Debian Security Advisory DSA 3538-1 (libebml - 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: libEBML 1.3.3
Patch: github.com

Timelineinfo

01/29/2016 🔍
01/29/2016 +0 days 🔍
01/29/2016 +0 days 🔍
02/01/2016 +3 days 🔍
12/15/2016 +318 days 🔍
02/04/2017 +51 days 🔍
02/06/2017 +2 days 🔍
07/06/2022 +1976 days 🔍

Sourcesinfo

Advisory: 88409e2a94dd3b40ff81d08bf6d92f486d036b24
Researcher: Aleksandar Nikolic
Organization: Cisco Talos
Status: Not defined
Confirmation: 🔍

CVE: CVE-2015-8789 (🔍)
GCVE (CVE): GCVE-0-2015-8789
GCVE (VulDB): GCVE-100-80727

OVAL: 🔍

SecurityFocus: 94924 - Matroska libEBML CVE-2016-1515 Multiple Double Free Denial of Service Vulnerabilities

See also: 🔍

Entryinfo

Created: 02/01/2016 10:40
Updated: 07/06/2022 14:59
Changes: 02/01/2016 10:40 (50), 07/11/2018 04:10 (31), 07/06/2022 14:59 (4)
Complete: 🔍
Cache ID: 216::103

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