Security readout for executives and security teams
Plain-English summary
This vulnerability affects Cloud Foundry Bits Service Release before 2.14.0. A malicious remote user who obtains a signed URL could recover the signing key and gain read and write access to Bits Service storage, creating serious confidentiality and integrity risk.
Executive priority
Treat as high priority for affected Cloud Foundry environments because compromise could expose or alter Bits Service storage. Prioritize version validation and upgrade planning.
Technical view
Bits Service Release used an insecure hashing algorithm for signed URLs. With low privileges and no user interaction, an attacker may derive the signing key from a signed URL and use it to access Bits Service storage. CVSS v3.0 score is 8.1 high.
Likely exposure
Exposure is likely limited to Cloud Foundry environments running Bits Service Release versions prior to 2.14.0, especially where users can obtain signed Bits Service URLs.
Exploitation context
The source bundle does not show CISA KEV listing or cited evidence of active exploitation. The described attack requires obtaining a signed URL, then abusing weak signing to access storage.
Researcher notes
Evidence is concise and vendor-specific. The bundle identifies the flawed signed URL hashing and fixed version boundary, but does not provide exploit telemetry, detailed indicators, or key-rotation procedure.
Mitigation direction
- Upgrade Cloud Foundry Bits Service Release to 2.14.0 or later.
- Check Cloud Foundry advisory guidance before changing keys or storage settings.
- Review Bits Service storage for unauthorized reads, writes, or object changes.
- Investigate exposed or shared signed URLs created before remediation.
Validation and detection
- Inventory deployed Bits Service Release versions across Cloud Foundry foundations.
- Confirm no environment is running a version prior to 2.14.0.
- Review logs for unusual Bits Service storage read or write activity.
- Validate access controls around generation and sharing of signed URLs.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CVE-2018-15796 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 8.1 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N2.85.2Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
8.1HighVector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://www.cloudfoundry.org/blog/cve-2018-15796CVE reference · x_refsource_CONFIRM
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.