Vulnerability Details : CVE-2023-6193
quiche v. 0.15.0 through 0.19.0 was discovered to be vulnerable to unbounded queuing of path validation messages, which could lead to excessive resource consumption.
QUIC path validation (RFC 9000 Section 8.2) requires that the recipient of a PATH_CHALLENGE frame responds by sending a PATH_RESPONSE. An unauthenticated remote attacker can exploit the vulnerability by sending PATH_CHALLENGE frames and manipulating the connection (e.g. by restricting the peer's congestion window size) so that PATH_RESPONSE frames can only be sent at the slower rate than they are received; leading to storage of path validation data in an unbounded queue.
Quiche versions greater than 0.19.0 address this problem.
Products affected by CVE-2023-6193
- cpe:2.3:a:cloudflare:quiche:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2023-6193
0.14%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 50 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2023-6193
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
---|---|---|---|---|---|---|
5.3
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L |
3.9
|
1.4
|
Cloudflare, Inc. | |
5.3
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L |
3.9
|
1.4
|
NIST |
CWE ids for CVE-2023-6193
-
The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources.Assigned by:
- cna@cloudflare.com (Secondary)
- nvd@nist.gov (Primary)
References for CVE-2023-6193
-
https://github.com/cloudflare/quiche/security/advisories/GHSA-w3vp-jw9m-f9pm
Unbounded queuing of path validation messages in cloudflare-quiche · Advisory · cloudflare/quiche · GitHubVendor Advisory
-
https://datatracker.ietf.org/doc/html/rfc9000#section-8.2
RFC 9000 - QUIC: A UDP-Based Multiplexed and Secure TransportTechnical Description
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