VDB-114087 · CVE-2018-5255 · Qualys 43671

Arista EOS up to 4.19.4/4.20.2 UDP Packet data processing

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.1$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Arista EOS up to 4.19.4/4.20.2. The affected element is an unknown function of the component UDP Packet Handler. Performing a manipulation results in data processing. This vulnerability is reported as CVE-2018-5255. The attack is possible to be carried out remotely. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Arista EOS up to 4.19.4/4.20.2. This affects an unknown functionality of the component UDP Packet Handler. The manipulation with an unknown input leads to a data processing vulnerability. CWE is classifying the issue as CWE-19. This is going to have an impact on availability. The summary by CVE is:

The Mlag agent in Arista EOS 4.19 before 4.19.4M and 4.20 before 4.20.2F allows remote attackers to cause a denial of service (agent restart) via crafted UDP packets.

The bug was discovered 03/01/2018. The weakness was disclosed 03/05/2018 (Website). It is possible to read the advisory at arista.com. This vulnerability is uniquely identified as CVE-2018-5255 since 01/05/2018. The exploitability is told to be easy. It is possible to initiate the attack remotely. The successful exploitation needs a authentication. The technical details are unknown and an exploit is not publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 4 days. During that time the estimated underground price was around $0-$5k. The commercial vulnerability scanner Qualys is able to test this issue with plugin 43671 (Arista EOS denial of service vulnerability (SA0032)).

Upgrading to version 4.19.4M or 4.20.2F eliminates this vulnerability.

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

Productinfo

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.3

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.5
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Data processing
CWE: CWE-19
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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Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: EOS 4.19.4M/4.20.2F

Timelineinfo

01/05/2018 🔍
03/01/2018 +55 days 🔍
03/05/2018 +4 days 🔍
03/05/2018 +0 days 🔍
03/06/2018 +1 days 🔍
01/10/2020 +675 days 🔍

Sourcesinfo

Advisory: arista.com
Status: Not defined
Confirmation: 🔍

CVE: CVE-2018-5255 (🔍)
GCVE (CVE): GCVE-0-2018-5255
GCVE (VulDB): GCVE-100-114087

Entryinfo

Created: 03/06/2018 07:51
Updated: 01/10/2020 15:29
Changes: 03/06/2018 07:51 (60), 01/10/2020 15:29 (2)
Complete: 🔍
Cache ID: 216::103

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