Fabrice Bellard QEMU up to 2.0.x CLIENT_CUT_TEXT Message infinite loop

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.
6.3$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Fabrice Bellard QEMU up to 2.0.x. The impacted element is an unknown function of the component CLIENT_CUT_TEXT Message Handler. This manipulation causes infinite loop. The identification of this vulnerability is CVE-2015-5239. It is possible to initiate the attack remotely. There is no exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in Fabrice Bellard QEMU up to 2.0.x (Virtualization Software). Affected by this vulnerability is an unknown functionality of the component CLIENT_CUT_TEXT Message Handler. The manipulation with an unknown input leads to a infinite loop vulnerability. The CWE definition for the vulnerability is CWE-835. The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop. As an impact it is known to affect availability. The summary by CVE is:

Integer overflow in the VNC display driver in QEMU before 2.1.0 allows attachers to cause a denial of service (process crash) via a CLIENT_CUT_TEXT message, which triggers an infinite loop.

The weakness was shared 04/22/2023. It is possible to read the advisory at arista.com. This vulnerability is known as CVE-2015-5239 since 07/01/2015. The exploitation appears to be easy. The attack can be launched remotely. The successful exploitation needs a single authentication. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

The commercial vulnerability scanner Qualys is able to test this issue with plugin 168944 (SUSE Enterprise Linux Security update for qemu (SUSE-SU-2016:1560-1)).

Upgrading to version 2.1.0 eliminates this vulnerability. Applying the patch f9a70e79391f6d7c2a912d785239ee8effc1922d is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.3

VulDB Base Score: 6.5
VulDB Temp Score: 6.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.5
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

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

NVD Base Score: 🔍

Exploitinginfo

Class: Infinite loop
CWE: CWE-835 / 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-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: QEMU 2.1.0
Patch: f9a70e79391f6d7c2a912d785239ee8effc1922d

Timelineinfo

07/01/2015 🔍
04/22/2023 +2852 days 🔍
04/22/2023 +0 days 🔍
10/01/2024 +528 days 🔍

Sourcesinfo

Vendor: bellard.org

Advisory: USN-2745-1
Status: Confirmed

CVE: CVE-2015-5239 (🔍)
GCVE (CVE): GCVE-0-2015-5239
GCVE (VulDB): GCVE-100-227179

Entryinfo

Created: 04/22/2023 09:08
Updated: 10/01/2024 21:50
Changes: 04/22/2023 09:08 (59), 05/15/2023 18:10 (1), 10/01/2024 21:50 (17)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Do you want to use VulDB in your project?

Use the official API to access entries easily!