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State exhaustion DoS

Low
kazuho published GHSA-9h2v-5p8c-4wrr Dec 12, 2023

Package

quicly

Affected versions

commits up to 43f86e5

Patched versions

commit db5d54a and above

Description

Impact

Quicly up to commit 43f86e5 is susceptible to a state exhaustion attack.

A remote attacker can exploit this vulnerability to progressively increase the memory retained by the QUIC stack. This may lead to applications using quicly to abort due to memory exhaustion.

Patches

The vulnerability has been addressed in commit db5d54a. Users should upgrade quicly to commit db5d54a or above.

References

This vulnerability is an instance of a missspecification (or an oversight) of the QUIC version 1 protocol, which was reported by @marten-seemann.

See also: corresponding H2O security advisory.

Severity

Low

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
High
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

CVE ID

CVE-2023-50247

Weaknesses

No CWEs