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CVE-2023-6193

MEDIUM
Published 2023-12-12T13:32:03.183Z
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CVSS Score

V3.1
5.3
/10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Base Score Metrics
Exploitability: N/A Impact: N/A

EPSS Score

v2025.03.14
0.003
probability
of exploitation in the wild

There is a 0.3% chance that this vulnerability will be exploited in the wild within the next 30 days.

Updated: 2025-06-25
Exploit Probability
Percentile: 0.547
Higher than 54.7% of all CVEs

Attack Vector Metrics

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED

Impact Metrics

Confidentiality
NONE
Integrity
NONE
Availability
LOW

Description

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.

Available Exploits

No exploits available for this CVE.

Related News

No news articles found for this CVE.

Affected Products

Cloudflare

quiche

Affected Versions:

0.15.0

GitHub Security Advisories

Community-driven vulnerability intelligence from GitHub

✓ GitHub Reviewed MODERATE

Unbounded queuing of path validation messages in cloudflare-quiche

GHSA-w3vp-jw9m-f9pm

Advisory Details

### Impact 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](https://datatracker.ietf.org/doc/html/rfc9000#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. ### Patches Quiche versions greater than 0.19.0 address this problem. ### References [CVE-2023-6193](https://www.cve.org/CVERecord?id=CVE-2023-6193) [RFC 9000 Section 8.2](https://datatracker.ietf.org/doc/html/rfc9000#section-8.2)

Affected Packages

crates.io quiche
ECOSYSTEM: ≥0.15.0 <0.19.1

CVSS Scoring

CVSS Score

5.0

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

References

WEB https://github.com/cloudflare/quiche/security/advisories/GHSA-w3vp-jw9m-f9pm
ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2023-6193
WEB https://github.com/cloudflare/quiche/commit/ea7ecf39ae28ab24cf1785c1674dc2e8a076f9ca
WEB https://datatracker.ietf.org/doc/html/rfc9000#section-8.2
PACKAGE https://github.com/cloudflare/quiche

Advisory provided by GitHub Security Advisory Database. Published: December 13, 2023, Modified: December 13, 2023

References

https://github.com/cloudflare/quiche/security/advisories/GHSA-w3vp-jw9m-f9pm
https://datatracker.ietf.org/doc/html/rfc9000#section-8.2
Published: 2023-12-12T13:32:03.183Z
Last Modified: 2024-08-02T08:21:17.737Z
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