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CVE-2024-2511 Affecting openssl package, versions *

low

Snyk CVSS

      Threat Intelligence

      EPSS 0.05% (15th percentile)
    Expand this section
    Red Hat
    3.7 low

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    • Snyk ID SNYK-DEBIAN10-OPENSSL-6592095
    • published 9 Apr 2024
    • disclosed 8 Apr 2024
    Report a new vulnerability Found a mistake?

    Introduced: 8 Apr 2024

    New CVE-2024-2511 Open this link in a new tab

    How to fix?

    There is no fixed version for Debian:10 openssl.

    NVD Description

    Note: Versions mentioned in the description apply only to the upstream openssl package and not the openssl package as distributed by Debian. See How to fix? for Debian:10 relevant fixed versions and status.

    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.