PolicyController up to 0.2.0 Image signature verification

CVSS Meta Temp Score
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CTI Interest Score
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7.4$0-$5k0.00

Summaryinfo

A vulnerability marked as critical has been reported in PolicyController up to 0.2.0. This impacts an unknown function of the component Image Handler. The manipulation leads to signature verification. This vulnerability is listed as CVE-2022-35930. The attack may be initiated remotely. In addition, an exploit is available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in PolicyController up to 0.2.0. This issue affects an unknown code of the component Image Handler. The manipulation with an unknown input leads to a signature verification vulnerability. Using CWE to declare the problem leads to CWE-347. The product does not verify, or incorrectly verifies, the cryptographic signature for data. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

PolicyController is a utility used to enforce supply chain policy in Kubernetes clusters. In versions prior to 0.2.1 PolicyController will report a false positive, resulting in an admission when it should not be admitted when there is at least one attestation with a valid signature and there are NO attestations of the type being verified (--type defaults to "custom"). An example image that can be used to test this is `ghcr.io/distroless/static@sha256:dd7614b5a12bc4d617b223c588b4e0c833402b8f4991fb5702ea83afad1986e2`. Users should upgrade to version 0.2.1 to resolve this issue. There are no workarounds for users unable to upgrade.

The weakness was presented 08/05/2022 as GHSA-739f-hw6h-7wq8. It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2022-35930 since 07/15/2022. It demands that the victim is doing some kind of user interaction. Technical details are unknown but a public exploit is available.

It is declared as proof-of-concept.

Upgrading to version 0.2.1 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch e852af36fb7d42678b21d7e97503c25bd1fd05c8 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.7
VulDB Meta Temp Score: 7.4

VulDB Base Score: 7.1
VulDB Temp Score: 6.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.8
NVD Vector: 🔍

CNA Base Score: 7.1
CNA Vector (GitHub, Inc.): 🔍

CVSSv2info

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

Exploitinginfo

Class: Signature verification
CWE: CWE-347 / CWE-345
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: PolicyController 0.2.1
Patch: e852af36fb7d42678b21d7e97503c25bd1fd05c8

Timelineinfo

07/15/2022 🔍
08/05/2022 +21 days 🔍
08/05/2022 +0 days 🔍
08/30/2022 +25 days 🔍

Sourcesinfo

Advisory: GHSA-739f-hw6h-7wq8
Status: Confirmed

CVE: CVE-2022-35930 (🔍)
GCVE (CVE): GCVE-0-2022-35930
GCVE (VulDB): GCVE-100-205643
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 08/05/2022 08:36
Updated: 08/30/2022 14:08
Changes: 08/05/2022 08:36 (54), 08/30/2022 14:08 (11)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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