VDB-150938 · CVE-2019-20382 · USN-4372-1

QEMU 4.1.0 ui/vnc-enc-zrle.c zrle_compress_data memory leak

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.
5.3	$0-$5k	0.00

Summaryinfo

A vulnerability was found in QEMU 4.1.0 and classified as problematic. The impacted element is the function zrle_compress_data of the file ui/vnc-enc-zrle.c. Such manipulation leads to memory leak. This vulnerability is listed as CVE-2019-20382. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability was found in QEMU 4.1.0 (Virtualization Software). It has been rated as problematic. Affected by this issue is the function zrle_compress_data of the file ui/vnc-enc-zrle.c. The manipulation with an unknown input leads to a memory leak vulnerability. Using CWE to declare the problem leads to CWE-401. The product does not sufficiently track and release allocated memory after it has been used, which slowly consumes remaining memory. Impacted is availability. CVE summarizes:

QEMU 4.1.0 has a memory leak in zrle_compress_data in ui/vnc-enc-zrle.c during a VNC disconnect operation because libz is misused, resulting in a situation where memory allocated in deflateInit2 is not freed in deflateEnd.

The weakness was presented 03/05/2020. This vulnerability is handled as CVE-2019-20382 since 01/20/2020. The exploitation is known to be easy. The attack may be launched remotely. A simple authentication is needed for exploitation. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 10/15/2024). This vulnerability is assigned to T1499 by the MITRE ATT&CK project.

The vulnerability scanner Nessus provides a plugin with the ID 208579 (CentOS 7 : qemu-kvm-ma (RHSA-2020:3907)), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at Tenable (208579). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

Virtualization Software

Name

QEMU

Version

4.1.0

License

open-source

Website

Product: https://www.qemu.org/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.4

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

NVD Base Score: 6.5
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 leak
CWE: CWE-401 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 208579
Nessus Name: CentOS 7 : qemu-kvm-ma (RHSA-2020:3907)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Patch: 6bf21f3d83e95bcc4ba35a7a07cc6655e8b010b0

Timelineinfo

01/20/2020 🔍
03/05/2020 +45 days 🔍
03/06/2020 +1 days 🔍
10/15/2024 +1684 days 🔍

Sourcesinfo

Product: qemu.org

Advisory: USN-4372-1
Status: Not defined

CVE: CVE-2019-20382 (🔍)
GCVE (CVE): GCVE-0-2019-20382
GCVE (VulDB): GCVE-100-150938

Entryinfo

Created: 03/06/2020 10:21
Updated: 10/15/2024 15:43
Changes: 03/06/2020 10:21 (35), 03/06/2020 10:26 (18), 04/09/2024 16:12 (20), 10/15/2024 15:43 (4)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.