libEBML up to 1.3.2 UTF-8 String UpdateFromUTF8 information disclosure

CVSS Meta Temp Score
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CTI Interest Score
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4.2$0-$5k0.00

A vulnerability was found in libEBML up to 1.3.2. It has been declared as problematic. This vulnerability affects the function EbmlUnicodeString::UpdateFromUTF8 of the component UTF-8 String Handler. The manipulation with an unknown input leads to a information disclosure vulnerability. 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. CVE summarizes:

The EbmlUnicodeString::UpdateFromUTF8 function in libEBML before 1.3.3 allows context-dependent attackers to obtain sensitive information from process heap memory via a crafted UTF-8 string, which triggers an invalid memory access.

The weakness was presented 01/29/2016 by Aleksandar Nikolic with Cisco Talos (Website). The advisory is shared for download at github.com. This vulnerability was named CVE-2015-8790 since 01/29/2016. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1592.

The vulnerability scanner Nessus provides a plugin with the ID 88999 (Debian DLA-438-1 : libebml 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 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 months after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (88999) and SecurityFocus (BID 85307†).

Productinfo

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License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
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VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 4.2

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 4.3
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

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

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 88999
Nessus Name: Debian DLA-438-1 : libebml security update
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 🔍
02/28/2016 +27 days 🔍
02/29/2016 +1 days 🔍
03/23/2016 +23 days 🔍
07/06/2022 +2296 days 🔍

Sourcesinfo

Advisory: ababb64e0c792ad2a314245233db0833ba12036b
Researcher: Aleksandar Nikolic
Organization: Cisco Talos
Status: Not defined
Confirmation: 🔍

CVE: CVE-2015-8790 (🔍)
OVAL: 🔍

SecurityFocus: 85307 - RETIRED: Matroska libEBML CVE-2015-8790 Information Disclosure Vulnerability

Entryinfo

Created: 02/01/2016 10:41 AM
Updated: 07/06/2022 03:04 PM
Changes: 02/01/2016 10:41 AM (55), 07/11/2018 04:10 AM (27), 07/06/2022 03:04 PM (4)
Complete: 🔍
Cache ID: 3:79A:40

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