QID 352258

Date Published: 2021-04-05

QID 352258: Amazon Linux Security Advisory for openssl11: ALAS2-2021-1622

<DIV> Issue Overview:

A flaw was found in openssl. A server crash and denial of service attack could occur if a client sends a TLSv1.2 renegotiation ClientHello and omits the signature_algorithms extension but includes a signature_algorithms_cert extension. The highest threat from this vulnerability is to system availability. (CVE-2021-3449 )

A flaw was found in openssl. The flag that enables additional security checks of certificates present in a certificate chain was not enabled allowing a confirmation step to verify that certificates in the chain are valid CA certificates is bypassed. The highest threat from this vulnerability is to data confidentiality and integrity. (CVE-2021-3450 )

</DIV>

Allows unauthorized disclosure of information; allows unauthorized modification; allows disruption of service.

CVSS V3 rated as High - 7.4 severity.

CVSS V2 rated as Medium - 5.8 severity.

Solution

Please refer to Amazon advisory ALAS-2021-1622 for affected packages and patching details, or update with your package manager.

Vendor References

ALAS-2021-1622 - alas.aws.amazon.com/AL2/ALAS-2021-1622.html

CVEs related to QID 352258

CVE-2021-3449 | CVE-2021-3450 |

Software Advisories

Advisory ID	Software	Component	Link
ALAS-2021-1622	Amazon Linux 2	openssl11 (1.1.1g-12.amzn2.0.3) on aarch64	alas.aws.amazon.com/AL2/ALAS-2021-1622.html
ALAS-2021-1622	Amazon Linux 2	openssl11 (1.1.1g-12.amzn2.0.3) on i686	alas.aws.amazon.com/AL2/ALAS-2021-1622.html
ALAS-2021-1622	Amazon Linux 2	openssl11 (1.1.1g-12.amzn2.0.3) on src	alas.aws.amazon.com/AL2/ALAS-2021-1622.html
ALAS-2021-1622	Amazon Linux 2	openssl11 (1.1.1g-12.amzn2.0.3) on x86_64	alas.aws.amazon.com/AL2/ALAS-2021-1622.html

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