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CVE-2021-23841

CVE-2021-23841 · Null pointer deref in X509_issuer_and_serial_hash()

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The OpenSSL public API function X509_issuer_and_serial_hash() attempts to create a unique hash value based on the issuer and serial number data contained within an X509 certificate. However it fails to correctly handle any errors that may occur while parsing the issuer field (which might occur if the issuer field is maliciously constructed). This may subsequently result in a NULL pointer deref and a crash leading to a potential denial of service attack. The function X509_issuer_and_serial_hash() is never directly called by OpenSSL itself so applications are only vulnerable if they use this function directly and they use it on certificates that may have been obtained from untrusted sources. OpenSSL versions 1.1.1i and below are affected by this issue. Users of these versions should upgrade to OpenSSL 1.1.1j. OpenSSL versions 1.0.2x and below are affected by this issue. However OpenSSL 1.0.2 is out of support and no longer receiving public updates. Premium support customers of OpenSSL 1.0.2 should upgrade to 1.0.2y. Other users should upgrade to 1.1.1j. Fixed in OpenSSL 1.1.1j (Affected 1.1.1-1.1.1i). Fixed in OpenSSL 1.0.2y (Affected 1.0.2-1.0.2x).

CVSS 5.9 · Mittel · EPSS 7,4% · Korrektur verfügbar

Veröffentlicht
Aktualisiert

Technologie-Stack: system · network

Betroffene Produkte und Versionen

  • openssl

    Softwareversionen
    • Fixed in OpenSSL 1.1.1j (Affected 1.1.1-1.1.1i): Betroffen
    • Fixed in OpenSSL 1.0.2y (Affected 1.0.2-1.0.2x): Betroffen

    Keine Korrektur veröffentlicht

  • openssl Debian:12

    Betroffene Versionsbereiche
    • ECOSYSTEM: < 1.1.1j-1

    Auf 1.1.1j-1 aktualisieren

  • openssl Debian:13

    Betroffene Versionsbereiche
    • ECOSYSTEM: < 1.1.1j-1

    Auf 1.1.1j-1 aktualisieren

  • openssl Debian:14

    Betroffene Versionsbereiche
    • ECOSYSTEM: < 1.1.1j-1

    Auf 1.1.1j-1 aktualisieren

  • openssl Ubuntu:Pro:14.04:LTS

    Softwareversionen
    • 1.0.1e-3ubuntu1
    • 1.0.1e-4ubuntu1
    • 1.0.1e-4ubuntu2
    • 1.0.1e-4ubuntu3
    • 1.0.1e-4ubuntu4
    • 1.0.1f-1ubuntu1
    • 1.0.1f-1ubuntu2
    • 1.0.1f-1ubuntu2.1
    • 1.0.1f-1ubuntu2.2
    • 1.0.1f-1ubuntu2.3
    • 1.0.1f-1ubuntu2.4
    • 1.0.1f-1ubuntu2.5
    • 1.0.1f-1ubuntu2.7
    • 1.0.1f-1ubuntu2.8
    • 1.0.1f-1ubuntu2.11
    • 1.0.1f-1ubuntu2.12
    • 1.0.1f-1ubuntu2.15
    • 1.0.1f-1ubuntu2.16
    • 1.0.1f-1ubuntu2.17
    • 1.0.1f-1ubuntu2.18
    • 1.0.1f-1ubuntu2.19
    • 1.0.1f-1ubuntu2.20
    • 1.0.1f-1ubuntu2.21
    • 1.0.1f-1ubuntu2.22
    • 1.0.1f-1ubuntu2.23
    • 1.0.1f-1ubuntu2.24
    • 1.0.1f-1ubuntu2.25
    • 1.0.1f-1ubuntu2.26
    • 1.0.1f-1ubuntu2.27
    • 1.0.1f-1ubuntu2.27+esm1
    Betroffene Versionsbereiche
    • ECOSYSTEM: < 1.0.1f-1ubuntu2.27+esm2

    Auf 1.0.1f-1ubuntu2.27+esm2 aktualisieren

  • openssl Ubuntu:16.04:LTS

    Softwareversionen
    • 1.0.2d-0ubuntu1
    • 1.0.2d-0ubuntu2
    • 1.0.2e-1ubuntu1
    • 1.0.2f-2ubuntu1
    • 1.0.2g-1ubuntu2
    • 1.0.2g-1ubuntu3
    • 1.0.2g-1ubuntu4
    • 1.0.2g-1ubuntu4.1
    • 1.0.2g-1ubuntu4.2
    • 1.0.2g-1ubuntu4.4
    • 1.0.2g-1ubuntu4.5
    • 1.0.2g-1ubuntu4.6
    • 1.0.2g-1ubuntu4.8
    • 1.0.2g-1ubuntu4.9
    • 1.0.2g-1ubuntu4.10
    • 1.0.2g-1ubuntu4.11
    • 1.0.2g-1ubuntu4.12
    • 1.0.2g-1ubuntu4.13
    • 1.0.2g-1ubuntu4.14
    • 1.0.2g-1ubuntu4.15
    • 1.0.2g-1ubuntu4.16
    • 1.0.2g-1ubuntu4.17
    • 1.0.2g-1ubuntu4.18
    Betroffene Versionsbereiche
    • ECOSYSTEM: < 1.0.2g-1ubuntu4.19

    Auf 1.0.2g-1ubuntu4.19 aktualisieren

  • openssl Ubuntu:18.04:LTS

    Softwareversionen
    • 1.0.2g-1ubuntu13
    • 1.0.2g-1ubuntu14
    • 1.0.2n-1ubuntu1
    • 1.1.0g-2ubuntu1
    • 1.1.0g-2ubuntu2
    • 1.1.0g-2ubuntu3
    • 1.1.0g-2ubuntu4
    • 1.1.0g-2ubuntu4.1
    • 1.1.0g-2ubuntu4.3
    • 1.1.1-1ubuntu2.1~18.04.1
    • 1.1.1-1ubuntu2.1~18.04.2
    • 1.1.1-1ubuntu2.1~18.04.3
    • 1.1.1-1ubuntu2.1~18.04.4
    • 1.1.1-1ubuntu2.1~18.04.5
    • 1.1.1-1ubuntu2.1~18.04.6
    • 1.1.1-1ubuntu2.1~18.04.7
    Betroffene Versionsbereiche
    • ECOSYSTEM: < 1.1.1-1ubuntu2.1~18.04.8

    Auf 1.1.1-1ubuntu2.1~18.04.8 aktualisieren

  • openssl1.0 Ubuntu:18.04:LTS

    Softwareversionen
    • 1.0.2n-1ubuntu2
    • 1.0.2n-1ubuntu3
    • 1.0.2n-1ubuntu4
    • 1.0.2n-1ubuntu5
    • 1.0.2n-1ubuntu5.1
    • 1.0.2n-1ubuntu5.2
    • 1.0.2n-1ubuntu5.3
    • 1.0.2n-1ubuntu5.4
    • 1.0.2n-1ubuntu5.5
    Betroffene Versionsbereiche
    • ECOSYSTEM: < 1.0.2n-1ubuntu5.6

    Auf 1.0.2n-1ubuntu5.6 aktualisieren

  • openssl Ubuntu:20.04:LTS

    Softwareversionen
    • 1.1.1c-1ubuntu4
    • 1.1.1d-2ubuntu3
    • 1.1.1d-2ubuntu6
    • 1.1.1f-1ubuntu1
    • 1.1.1f-1ubuntu2
    • 1.1.1f-1ubuntu2.1
    Betroffene Versionsbereiche
    • ECOSYSTEM: < 1.1.1f-1ubuntu2.2

    Auf 1.1.1f-1ubuntu2.2 aktualisieren

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