QID 670877

QID 670877: EulerOS Security Update for Open Secure Sockets Layer (OpenSSL) (EulerOS-SA-2021-1985)

The OpenSSL toolkit provides support for secure communications between machines. OpenSSL includes a certificate management tool and shared libraries which provide various cryptographic algorithms and protocols. Security Fix(es): An OpenSSL TLS server may crash if sent a maliciously crafted renegotiation ClientHello message from a client. If a TLSv1.2 renegotiation ClientHello omits the signature_algorithms extension (where it was present in the initial ClientHello), but includes a signature_algorithms_cert extension then a NULL pointer dereference will result, leading to a crash and a denial of service attack. A server is only vulnerable if it has TLSv1.2 and renegotiation enabled (which is the default configuration). OpenSSL TLS clients are not impacted by this issue.(CVE-2021-3449)
Note: The preceding description block is extracted directly from the security advisory. Using automation, we have attempted to clean and format it as much as possible without introducing additional issues.

An arbitrary attacker may exploit this vulnerability to compromise the system.

  • CVSS V3 rated as Medium - 5.9 severity.
  • CVSS V2 rated as Medium - 4.3 severity.
    • Solution
    The Vendor has released a security update to fix the vulnerability. For more information please visit EulerOS-SA-2021-1985 for updates and patch information
    Vendor References

    CVEs related to QID 670877

    CVE-2021-3449 |
    Software Advisories
    Advisory ID Software Component Link
    EulerOS-SA-2021-1985 EulerOS V2.0SP8 URL Logo developer.huaweicloud.com/ict/en/site-euleros/euleros/security-advisories/EulerOS-SA-2021-1985
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