CVE-2024-2511

Summary

Issue summary: Some non-default TLS server configurations can cause unbounded memory growth when processing TLSv1.3 sessions

Impact summary: An attacker may exploit certain server configurations to trigger unbounded memory growth that would lead to a Denial of Service

This problem can occur in TLSv1.3 if the non-default SSL_OP_NO_TICKET option is being used (but not if early_data support is also configured and the default anti-replay protection is in use). In this case, under certain conditions, the session cache can get into an incorrect state and it will fail to flush properly as it fills. The session cache will continue to grow in an unbounded manner. A malicious client could deliberately create the scenario for this failure to force a Denial of Service. It may also happen by accident in normal operation.

This issue only affects TLS servers supporting TLSv1.3. It does not affect TLS clients.

The FIPS modules in 3.2, 3.1 and 3.0 are not affected by this issue. OpenSSL 1.0.2 is also not affected by this issue.

Affected Software

VendorProductVersion RangeStatus
OpenSSLOpenSSL3.2.0 < 3.2.2affected
OpenSSLOpenSSL3.1.0 < 3.1.6affected
OpenSSLOpenSSL3.0.0 < 3.0.14affected
OpenSSLOpenSSL1.1.1 < 1.1.1yaffected

Weaknesses

  • CWE-1325: CWE-1325 Improperly Controlled Sequential Memory Allocation

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

CVE Program Container

Additional References

Additional References

References