CVE-2023-32560
Published: 10 August 2023
Summary
CVE-2023-32560 is a critical-severity Out-of-bounds Write (CWE-787) vulnerability in Ivanti Avalanche. Its CVSS base score is 9.8 (Critical).
Operationally, ranked in the top 0.3% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
Deeper analysis
CVE-2023-32560 affects the Wavelink Avalanche Manager and stems from improper input validation combined with an out-of-bounds write. An unauthenticated attacker can submit a specially crafted network message that triggers the flaw, potentially causing service disruption or arbitrary code execution. The issue carries a CVSS 3.1 base score of 9.8 and was reported by a Tenable researcher.
Because the attack requires no credentials or user interaction and can be launched remotely, any reachable Avalanche Manager instance is exposed to full compromise or denial-of-service. Public exploit code for the vulnerability has been posted to PacketStorm.
The vendor addressed the problem in Avalanche version 6.4.1, as noted in the corresponding Ivanti advisory. The EPSS score currently stands at 0.9221, indicating sustained exploitation interest since disclosure.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2023-36804
Vulnerability details
An attacker can send a specially crafted message to the Wavelink Avalanche Manager, which could result in service disruption or arbitrary code execution. Thanks to a Researcher at Tenable for finding and reporting. Fixed in version 6.4.1.
- 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.
Security testing and developer training directly verify and enforce proper input validation, reducing exploitability of injection and malformed-data weaknesses.
Security testing and evaluation at multiple SDLC stages directly detects missing or flawed input validation, with the required remediation process ensuring fixes are applied.
Directly implements checks on information inputs to reject invalid data before processing.
Out-of-bounds writes that corrupt control flow or inject shellcode are rendered non-executable by the same memory protections.
Spam protection mechanisms perform filtering and detection on inbound/outbound messages, directly compensating for missing or weak input validation of unsolicited content.