Arista EOS ARP Packet input validation

CVSS Meta Temp Score
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CTI Interest Score
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6.4$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, was found in Arista EOS. This vulnerability affects unknown code. Executing a manipulation as part of ARP Packet can lead to input validation. The identification of this vulnerability is CVE-2019-18948. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability has been found in Arista EOS (affected version not known) and classified as problematic. This vulnerability affects some unknown functionality. The manipulation as part of a ARP Packet leads to a input validation vulnerability. The CWE definition for the vulnerability is CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. As an impact it is known to affect availability. CVE summarizes:

An issue was found in Arista EOS. Specific malformed ARP packets can impact the software forwarding of VxLAN packets. This issue is found in Arista’s EOS VxLAN code, which can allow attackers to crash the VxlanSwFwd agent. This affects EOS 4.21.8M and below releases in the 4.21.x train, 4.22.3M and below releases in the 4.22.x train, 4.23.1F and below releases in the 4.23.x train, and all releases in 4.15, 4.16, 4.17, 4.18, 4.19, 4.20 code train.

The weakness was shared 04/16/2020 (Website). The advisory is shared for download at arista.com. This vulnerability was named CVE-2019-18948 since 11/13/2019. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available.

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

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Productinfo

Vendor

Name

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.4

VulDB Base Score: 5.3
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
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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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

11/13/2019 🔍
04/16/2020 +155 days 🔍
04/17/2020 +1 days 🔍
04/17/2020 +0 days 🔍

Sourcesinfo

Advisory: arista.com
Status: Not defined

CVE: CVE-2019-18948 (🔍)
GCVE (CVE): GCVE-0-2019-18948
GCVE (VulDB): GCVE-100-153904

Entryinfo

Created: 04/17/2020 09:50
Updated: 04/17/2020 09:55
Changes: 04/17/2020 09:50 (36), 04/17/2020 09:55 (17)
Complete: 🔍
Cache ID: 216::103

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