Hash Collision Vulnerability in LiteSpeed QUIC by LiteSpeed Technologies
CVE-2025-24947

5.3MEDIUM

Key Information:

Vendor

Litespeedtech

Status
Lsquic
Vendor
CVE Published:
20 February 2025

What is CVE-2025-24947?

A hash collision vulnerability exists in LiteSpeed QUIC that enables remote attackers to exploit the hash table managing connections. By sending requests with colliding Source Connection IDs (SCIDs), attackers can significantly overload the server's CPU, leading to potential Denial of Service (DoS) conditions. This issue arises from the use of XXH32 in previous versions, making it crucial for users to upgrade to version 4.2.0 or later to mitigate risks.

Affected Version(s)

LSQUIC 0 < 4.2.0

References

https://xxhash.com
https://github.com/ncc-pbottine/QUIC-Hash-Dos-Advisory
https://github.com/litespeedtech/lsquic/releases/tag/v4.2.0

CVSS V3.1

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.