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.
5.7	$0-$5k	0.00

A vulnerability has been found in Arista 7280R3, 7289R3, 7500R3 and 7800R3 up to 4.28.5.1M/4.29.1F and classified as problematic. This vulnerability affects an unknown functionality of the component Mirroring Handler. The manipulation with an unknown input leads to a out-of-bounds vulnerability. The CWE definition for the vulnerability is CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect availability.

The weakness was published 08/24/2023 as Security Advisory 0088 / Bug 829136 as confirmed security advisory (Website). The advisory is available at arista.com. The security advisory contains:

In order to be vulnerable to the CVE a system must already be impacted by BUG765111, which is a non CVE known issue.

This vulnerability was named CVE-2023-3646. The technical details are unknown and an exploit is not available. The advisory points out:

On affected platforms running Arista EOS with mirroring to multiple destinations configured, an internal system error may trigger a kernel panic and cause system reload.

Upgrading to version 4.28.6M or 4.29.2F eliminates this vulnerability. It is possible to mitigate the problem by applying the configuration setting Disable Mirroring Config. The best possible mitigation is suggested to be upgrading to the latest version. The security advisory contains the following remark:

The recommended resolution is to upgrade to a remediated software version at your earliest convenience.

Productinfo

Vendor

• Arista

Name

• 7280R3
• 7289R3
• 7500R3
• 7800R3

Version

• 4.28.5.1M
• 4.29.1F

License

• commercial

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

CVSSv4info

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

CVSSv3info

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

VulDB Base Score: 3.7
VulDB Temp Score: 3.6
VulDB Vector: 🔒
VulDB Reliability: 🔍

Vendor Base Score (Arista): 5.9
Vendor Vector (Arista): 🔒

NVD Base Score: 7.5
NVD Vector: 🔒

CNA Base Score: 5.9
CNA Vector (Arista Networks, Inc.): 🔒

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: 🔍

Exploitinginfo

Class: Out-of-bounds
CWE: CWE-125 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

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

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: 7280R3/7289R3/7500R3/7800R3 4.28.6M/4.29.2F
Config: Disable Mirroring Config

Timelineinfo

07/12/2023 CVE reserved
08/24/2023 +43 days Advisory disclosed
08/24/2023 +0 days VulDB entry created
09/16/2023 +23 days VulDB entry last update

Sourcesinfo

Advisory: Security Advisory 0088 / Bug 829136
Status: Confirmed

CVE: CVE-2023-3646 (🔒)

Entryinfo

Created: 08/24/2023 14:20
Updated: 09/16/2023 17:19
Changes: 08/24/2023 14:20 (36), 08/24/2023 14:23 (18), 09/16/2023 17:12 (2), 09/16/2023 17:19 (21)
Complete: 🔍

Discussion

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