CVE-2023-22512
Published: 16 January 2024
Summary
CVE-2023-22512 is a high-severity Uncontrolled Resource Consumption (CWE-400) vulnerability in Atlassian Confluence Data Center. Its CVSS base score is 7.5 (High).
Operationally, ranked in the top 5.3% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
Deeper analysis
CVE-2023-22512 is a high-severity denial-of-service vulnerability affecting Confluence Data Center and Server, introduced in version 5.6.0. It carries a CVSS 3.1 score of 7.5 with the vector AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H, corresponding to CWE-400 and an NVD-CWE-noinfo entry. The flaw permits an unauthenticated network attacker to render a Confluence instance unavailable by exhausting resources, with no effect on confidentiality or integrity.
An unauthenticated remote attacker can trigger the condition over the network without user interaction, resulting in temporary or sustained disruption of the Confluence service and high impact to availability for all users of the affected instance.
Atlassian’s advisory directs customers to upgrade Confluence Data Center and Server to 7.19.14 or later, 8.5.1 or later, or any 8.6 release; instances already on 8.6 or newer require no action. Fixed releases and release notes are available from the vendor’s download center and documentation pages. The issue was disclosed through Atlassian’s Bug Bounty program. The associated EPSS score has remained flat at 0.1481 with no material increase after publication.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2023-26652
Vulnerability details
This High severity DoS (Denial of Service) vulnerability was introduced in version 5.6.0 of Confluence Data Center and Server. With a CVSS Score of 7.5, this vulnerability allows an unauthenticated attacker to cause a resource to be unavailable for its…
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intended users by temporarily or indefinitely disrupting services of a vulnerable host (Confluence instance) connected to a network, which has no impact to confidentiality, no impact to integrity, high impact to availability, and requires no user interaction. Atlassian recommends that Confluence Data Center and Server customers upgrade to latest version, if you are unable to do so, upgrade your instance to one of the specified supported fixed versions: Confluence Data Center and Server 7.19: Upgrade to a release greater than or equal to 7.19.14 Confluence Data Center and Server 8.5: Upgrade to a release greater than or equal to 8.5.1 Confluence Data Center and Server 8.6 or above: No need to upgrade, you're already on a patched version See the release notes (https://confluence.atlassian.com/doc/confluence-release-notes-327.html ). You can download the latest version of Confluence Data Center and Server from the download center (https://www.atlassian.com/software/confluence/download-archives ]). This vulnerability was reported via our Bug Bounty program.
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Limiting concurrent sessions directly prevents uncontrolled resource consumption by capping the number of active sessions per user or account.
Analysis identifies uncontrolled resource consumption indicative of denial-of-service or abuse attempts.
Contingency plan testing includes resource exhaustion scenarios to verify recovery, making it harder for attackers to sustain exploits that cause uncontrolled consumption.
Updated contingency plans include current procedures to detect, contain, and recover from resource exhaustion, limiting an attacker's ability to sustain impact from uncontrolled consumption.
Alternate site allows resumption of operations if resource exhaustion at the primary site is exploited to cause unavailability.
Alternate telecommunications services enable resumption of essential functions when primary services become unavailable due to uncontrolled resource consumption.
The team can analyze and respond to resource exhaustion incidents, reducing the impact of attacks that exploit uncontrolled consumption weaknesses.
Timely maintenance support and spare parts enable rapid recovery from failures induced by uncontrolled resource consumption, shortening the impact window of denial-of-service attacks.