QEMU e1000 NIC Emulator process_tx_desc infinite loop

CVSS Meta Temp Score
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CTI Interest Score
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5.5$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, was found in QEMU. Impacted is the function process_tx_desc of the component e1000 NIC Emulator. The manipulation results in infinite loop. This vulnerability was named CVE-2021-20257. There is no available exploit. Applying a patch is advised to resolve this issue.

Detailsinfo

A vulnerability was found in QEMU (Virtualization Software) (affected version not known). It has been classified as problematic. Affected is the function process_tx_desc of the component e1000 NIC Emulator. The manipulation with an unknown input leads to a infinite loop vulnerability. CWE is classifying the issue as CWE-835. The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop. This is going to have an impact on availability.

The weakness was presented 03/16/2022 as 3de46e6fc489c52c9431a8a832ad8170a7569bd8. The advisory is shared for download at github.com. This vulnerability is traded as CVE-2021-20257 since 12/17/2020. There are known technical details, but no exploit is 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.

Applying the patch 3de46e6fc489c52c9431a8a832ad8170a7569bd8 is able to eliminate this problem. The bugfix is ready for download at github.com.

The vulnerability is also documented in the vulnerability database at Tenable (209571). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.7
VulDB Meta Temp Score: 5.5

VulDB Base Score: 5.7
VulDB Temp Score: 5.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

Exploitinginfo

Class: Infinite loop
CWE: CWE-835 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Partially

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: Patch
Status: 🔍

0-Day Time: 🔍

Patch: 3de46e6fc489c52c9431a8a832ad8170a7569bd8

Timelineinfo

12/17/2020 🔍
03/16/2022 +454 days 🔍
03/16/2022 +0 days 🔍
10/26/2024 +954 days 🔍

Sourcesinfo

Product: qemu.org

Advisory: 3de46e6fc489c52c9431a8a832ad8170a7569bd8
Status: Confirmed

CVE: CVE-2021-20257 (🔍)
GCVE (CVE): GCVE-0-2021-20257
GCVE (VulDB): GCVE-100-195288

Entryinfo

Created: 03/16/2022 22:43
Updated: 10/26/2024 01:42
Changes: 03/16/2022 22:43 (41), 03/19/2022 13:44 (1), 10/26/2024 01:42 (20)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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