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PushSessionCacheFilter can cause remote DoS attacks

Low
joakime published GHSA-r7m4-f9h5-gr79 Oct 14, 2024

Package

maven org.eclipse.jetty:jetty-servlets (Maven)

Affected versions

>=10.0.0, <=10.0.17
>=11.0.0, <=11.0.17
>=12.0.0, <=12.0.3

Patched versions

10.0.18
11.0.18
12.0.4

Description

Impact

Jetty PushSessionCacheFilter can be exploited by unauthenticated users to launch remote DoS attacks by exhausting the server’s memory.

Patches

Workarounds

The session usage is intrinsic to the design of the PushCacheFilter. The issue can be avoided by:

  • not using the PushCacheFilter. Push has been deprecated by the various IETF specs and early hints responses should be used instead.
  • reducing the reducing the idle timeout on unauthenticated sessions will reduce the time such session stay in memory.
  • configuring a session cache to use session passivation, so that sessions are not stored in memory, but rather in a database or file system that may have significantly more capacity than memory.

References

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
Low
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:L/UI:N/S:U/C:N/I:N/A:L

CVE ID

CVE-2024-6762

Weaknesses