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CVE-2019-11873

CVE-2019-11873

This page contains facts from public vulnerability sources. Check the original advisory before updating.

wolfSSL 4.0.0 has a Buffer Overflow in DoPreSharedKeys in tls13.c when a current identity size is greater than a client identity size. An attacker sends a crafted hello client packet over the network to a TLSv1.3 wolfSSL server. The length fields of the packet: record length, client hello length, total extensions length, PSK extension length, total identity length, and identity length contain their maximum value which is 2^16. The identity data field of the PSK extension of the packet contains the attack data, to be stored in the undefined memory (RAM) of the server. The size of the data is about 65 kB. Possibly the attacker can perform a remote code execution attack.

CVSS 9.8 · Critical · EPSS 9.2% · Fix available

Published
Updated

Stack: system

Affected products and versions

  • n/a

    Versions
    • n/a: Affected

    No fix published

  • wolfssl Debian:12

    Affected ranges
    • ECOSYSTEM: < 4.1.0+dfsg-1

    Update to 4.1.0+dfsg-1

  • wolfssl Debian:13

    Affected ranges
    • ECOSYSTEM: < 4.1.0+dfsg-1

    Update to 4.1.0+dfsg-1

  • wolfssl Ubuntu:16.04:LTS

    Versions
    • 3.4.8+dfsg-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • wolfssl Ubuntu:18.04:LTS

    Versions
    • 3.10.2+dfsg-2
    • 3.12.0+dfsg-1
    • 3.12.2+dfsg-1
    • 3.13.0+dfsg-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

Original sources

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