Full Report
On 2018-04-09, a research was reported, involving , gaining initial access via 1-day vulnerability, while using SSRF, IMDS abuse, targeting Confluence Server, Jira Server to achieve Resp. disclosure.
Analysis Summary
# Vulnerability: Atlassian SSRF leading to Response Disclosure via IMDS Abuse
## CVE Details
- CVE ID: *Not explicitly provided in the context, requires external lookup based on the date/description.*
- CVSS Score: *Not explicitly provided in the context, requires external lookup based on the date/description.*
- CWE: *Not explicitly provided in the context, requires external lookup based on the date/description.*
## Affected Systems
- Products: Confluence Server, Jira Server
- Versions: *Specific vulnerable versions are not listed in the context, requires external lookup.*
- Configurations: Systems deployed in environments where SSRF exploitation can lead to access to AWS Instance Metadata Service (IMDS).
## Vulnerability Description
The vulnerability involves an initial access technique utilizing a 1-day vulnerability (a vulnerability known and likely patched but still widely unpatched) in Atlassian Confluence Server and Jira Server. The core flaw appears to be a Server-Side Request Forgery (SSRF) vulnerability. This SSRF was then leveraged to abuse the Instance Metadata Service (IMDS) potentially exposing sensitive credentials or metadata associated with the underlying cloud infrastructure hosting the application (e.g., AWS EC2). The ultimate impact observed was Response/Data Disclosure.
## Exploitation
- Status: PoC available (Implied by the nature of public research and described proof-of-concept technique).
- Complexity: Medium (Requires SSRF chained with IMDS abuse).
- Attack Vector: Network (Remote)
## Impact
- Confidentiality: High (Potential exposure of metadata/credentials leading to further compromise).
- Integrity: Medium (Potential for unauthorized modification depending on metadata scope).
- Availability: Low (Direct impact on the server is likely low, focus is on information leakage).
## Remediation
### Patches
- *No specific patch version numbers are provided in the context. Users must consult official Atlassian security advisories corresponding to the reported time frame (April 2018) or subsequent advisories for known SSRF flaws in Confluence/Jira.*
### Workarounds
- Implement strict network egress filtering on web servers to prevent connection attempts to internal/private IP ranges (e.g., 169.254.169.254 for IMDS).
- Restrict access to services hosting Atlassian products.
- If applicable, migrate to IMDSv2, which mitigates many SSRF-based IMDS access techniques.
## Detection
- Indicators of Compromise: Outbound network traffic originating from the Confluence/Jira server directed towards internal network segments or the IMDS endpoint (often 169.254.169.254).
- Detection methods and tools: Web application firewalls (WAF) logging and monitoring for SSRF signatures; network monitoring tools tracking anomalous outbound connections from application servers.
## References
- Vendor advisories: *Requires lookup based on Confluence/Jira security bulletins around April 2018.*
- Relevant links:
- https://hackerone.com/reports/326040
- https://infosecwriteups.com/piercing-the-veil-server-side-request-forgery-to-niprnet-access-c358fd5e249a