Istio up to 1.3.6 Mixer Policy Attribute input validation

CVSS Meta Temp Score
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CTI Interest Score
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7.3$0-$5k0.00

Summaryinfo

A vulnerability described as critical has been identified in Istio up to 1.3.6. Impacted is an unknown function of the component Mixer Policy Handler. Executing a manipulation as part of Attribute can lead to input validation. This vulnerability is tracked as CVE-2020-8843. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability has been found in Istio up to 1.3.6 and classified as critical. This vulnerability affects an unknown code block of the component Mixer Policy Handler. The manipulation as part of a Attribute 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 confidentiality, integrity, and availability. CVE summarizes:

An issue was discovered in Istio 1.3 through 1.3.6. Under certain circumstances, it is possible to bypass a specifically configured Mixer policy. Istio-proxy accepts the x-istio-attributes header at ingress that can be used to affect policy decisions when Mixer policy selectively applies to a source equal to ingress. To exploit this vulnerability, someone has to encode a source.uid in this header. This feature is disabled by default in Istio 1.3 and 1.4.

The weakness was disclosed 02/14/2020 (Website). The advisory is shared for download at istio.io. This vulnerability was named CVE-2020-8843 since 02/10/2020. 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.

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

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 7.3

VulDB Base Score: 7.3
VulDB Temp Score: 7.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.4
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

02/10/2020 🔍
02/14/2020 +4 days 🔍
02/16/2020 +2 days 🔍
02/16/2020 +0 days 🔍

Sourcesinfo

Advisory: istio.io
Status: Not defined

CVE: CVE-2020-8843 (🔍)
GCVE (CVE): GCVE-0-2020-8843
GCVE (VulDB): GCVE-100-150232

Entryinfo

Created: 02/16/2020 19:58
Updated: 02/16/2020 20:03
Changes: 02/16/2020 19:58 (37), 02/16/2020 20:03 (17)
Complete: 🔍
Cache ID: 216::103

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