QEMU up to 5.0.0 NBD Server Request assertion

CVSS Meta Temp Score
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CTI Interest Score
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4.9$0-$5k0.00

Summaryinfo

A vulnerability identified as problematic has been detected in QEMU up to 5.0.0. Affected by this vulnerability is an unknown functionality of the component NBD Server. The manipulation as part of Request leads to assertion. This vulnerability is documented as CVE-2020-10761. The attack can be initiated remotely. There is not any exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in QEMU up to 5.0.0 (Virtualization Software). This issue affects some unknown functionality of the component NBD Server. The manipulation as part of a Request leads to a assertion vulnerability. Using CWE to declare the problem leads to CWE-617. The product contains an assert() or similar statement that can be triggered by an attacker, which leads to an application exit or other behavior that is more severe than necessary. Impacted is availability. The summary by CVE is:

An assertion failure issue was found in the Network Block Device(NBD) Server in all QEMU versions before QEMU 5.0.1. This flaw occurs when an nbd-client sends a spec-compliant request that is near the boundary of maximum permitted request length. A remote nbd-client could use this flaw to crash the qemu-nbd server resulting in a denial of service.

The weakness was released 06/09/2020 as not defined bug report (Bugzilla). It is possible to read the advisory at bugzilla.redhat.com. The identification of this vulnerability is CVE-2020-10761 since 03/20/2020. The attack may be initiated remotely. A simple authentication is required for exploitation. The technical details are unknown and an exploit is not publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 209571 (Oracle Linux 8 : virt:kvm_utils3 (ELSA-2024-12792)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.0.1 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (209571). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.0
VulDB Meta Temp Score: 4.9

VulDB Base Score: 5.0
VulDB Temp Score: 4.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.0
NVD Vector: 🔍

CVSSv2info

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

Exploitinginfo

Class: Assertion
CWE: CWE-617
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: 209571
Nessus Name: Oracle Linux 8 : virt:kvm_utils3 (ELSA-2024-12792)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: QEMU 5.0.1

Timelineinfo

03/20/2020 🔍
06/09/2020 +81 days 🔍
06/10/2020 +1 days 🔍
10/26/2024 +1599 days 🔍

Sourcesinfo

Product: qemu.org

Advisory: bugzilla.redhat.com
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2020-10761 (🔍)
GCVE (CVE): GCVE-0-2020-10761
GCVE (VulDB): GCVE-100-156431

Entryinfo

Created: 06/10/2020 11:29
Updated: 10/26/2024 18:16
Changes: 06/10/2020 11:29 (40), 06/10/2020 11:34 (12), 10/23/2020 16:25 (1), 10/23/2020 16:28 (1), 10/26/2024 18:16 (19)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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