libMirage 3.2.2 CSO Filter filter-stream.c memory corruption

EntryHistoryDiffjsonxmlCTI

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.
6.1	$0-$5k	0.00

A vulnerability was found in libMirage 3.2.2. It has been classified as problematic. Affected is an unknown part of the file filters/filter-cso/filter-stream.c of the component CSO Filter. The manipulation with an unknown input leads to a memory corruption vulnerability. CWE is classifying the issue as 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. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

filters/filter-cso/filter-stream.c in the CSO filter in libMirage 3.2.2 in CDemu does not validate the part size, triggering a heap-based buffer overflow that can lead to root access by a local Linux user.

The weakness was released 08/25/2019 as not defined bug report (GitHub Repository). The advisory is available at gist.github.com. This vulnerability is traded as CVE-2019-15540 since 08/25/2019. Local access is required to approach this attack. A authentication is necessary for exploitation. Technical details and a public exploit are known.

After immediately, there has been an exploit disclosed. The exploit is shared for download at gist.github.com. It is declared as proof-of-concept. The code used by the exploit is:

43 49 53 4F 00 00 00 00 FF 00 00 00 00 00 00 FF
FF 00 00 00 00 30 00 00 00 00 00 00 61 61 00 00
2A 2A 2A 2A 2A 2A 2A 2A 2A 2A 2A 2A 2A 2A 2A 2A
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2A 2A 2A 2A 2A 2A 2A 2A 2A 2A 2A 2A 2A 2A 2A 2A
41 41 41 41 41 41 41 41

Applying a patch is able to eliminate this problem. The bugfix is ready for download at gist.github.com. A possible mitigation has been published immediately after the disclosure of the vulnerability.

Affected

Cdemu

Productinfo

Name

libMirage

Version

3.2.2

CPE 2.3info

CPE 2.2info

CVSSv4info

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

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.1

VulDB Base Score: 5.3
VulDB Temp Score: 4.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock

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

NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
ATT&CK: Unknown

Local: Yes
Remote: No

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	unlock	unlock	unlock	unlock
Today	unlock	unlock	unlock	unlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

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

Patch: gist.github.com

Timelineinfo

08/25/2019 🔍
08/25/2019 +0 days 🔍
08/25/2019 +0 days 🔍
08/25/2019 +0 days 🔍
08/26/2019 +1 days 🔍
12/01/2023 +1558 days 🔍

Sourcesinfo

Advisory: 0e9292c9
Status: Not defined

CVE: CVE-2019-15540 (🔍)
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 08/26/2019 07:54
Updated: 12/01/2023 18:30
Changes: 08/26/2019 07:54 (49), 08/05/2020 22:08 (17), 12/01/2023 18:30 (4)
Complete: 🔍

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