Cloud Foundry UAA IDP Token session expiration

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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4.4$0-$5k0.00

Summaryinfo

A vulnerability was found in Cloud Foundry UAA. It has been classified as problematic. Affected by this issue is some unknown functionality of the component IDP Token Handler. Performing a manipulation results in session expiration. This vulnerability was named CVE-2023-20903. There is no available exploit. It is advisable to use the suggested workaround.

Detailsinfo

A vulnerability was found in Cloud Foundry UAA (Cloud Software) (unknown version). It has been classified as problematic. This affects an unknown code block of the component IDP Token Handler. The manipulation with an unknown input leads to a session expiration vulnerability. CWE is classifying the issue as CWE-613. According to WASC, "Insufficient Session Expiration is when a web site permits an attacker to reuse old session credentials or session IDs for authorization." This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

This disclosure regards a vulnerability related to UAA refresh tokens and external identity providers.Assuming that an external identity provider is linked to the UAA, a refresh token is issued to a client on behalf of a user from that identity provider, the administrator of the UAA deactivates the identity provider from the UAA. It is expected that the UAA would reject a refresh token during a refresh token grant, but it does not (hence the vulnerability). It will continue to issue access tokens to request presenting such refresh tokens, as if the identity provider was still active. As a result, clients with refresh tokens issued through the deactivated identity provider would still have access to Cloud Foundry resources until their refresh token expires (which defaults to 30 days).

The weakness was presented 03/29/2023. The advisory is shared at cloudfoundry.org. This vulnerability is uniquely identified as CVE-2023-20903 since 11/01/2022. Neither technical details nor an exploit are publicly available.

The best possible mitigation is suggested to be Workaround.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2023-25071). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Vendor

Name

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.4
VulDB Meta Temp Score: 4.4

VulDB Base Score: 4.6
VulDB Temp Score: 4.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 4.3
NVD Vector: 🔍

CVSSv2info

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

Exploitinginfo

Class: Session expiration
CWE: CWE-613
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: Workaround
Status: 🔍

0-Day Time: 🔍

Timelineinfo

11/01/2022 🔍
03/29/2023 +147 days 🔍
03/29/2023 +0 days 🔍
09/02/2025 +888 days 🔍

Sourcesinfo

Advisory: cloudfoundry.org
Status: Confirmed

CVE: CVE-2023-20903 (🔍)
GCVE (CVE): GCVE-0-2023-20903
GCVE (VulDB): GCVE-100-224313
EUVD: 🔍

Entryinfo

Created: 03/29/2023 07:04
Updated: 09/02/2025 03:19
Changes: 03/29/2023 07:04 (38), 04/16/2023 16:04 (11), 09/02/2025 03:19 (16)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Discussion

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