QID 352269

Date Published: 2021-04-26

QID 352269: Amazon Linux Security Advisory for nettle: ALAS2-2021-1629

<DIV ID="issue_overview">
A flaw was found in Nettle, where several Nettle signature verification functions (GOST DSA, EDDSA & ECDSA) result in the Elliptic Curve Cryptography point (ECC) multiply function being called with out-of-range scalers, possibly resulting in incorrect results. This flaw allows an attacker to force an invalid signature, causing an assertion failure or possible validation. The highest threat to this vulnerability is to confidentiality, integrity, as well as system availability. (CVE-2021-20305 )
</DIV>

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

  • CVSS V3 rated as Critical - 8.1 severity.
  • CVSS V2 rated as High - 6.8 severity.
    • Solution
    Please refer to Amazon advisory: ALAS-2021-1629 for affected packages and patching details, or update with your package manager.
    Vendor References

    CVEs related to QID 352269

    CVE-2021-20305 |
    Software Advisories
    Advisory ID Software Component Link
    ALAS-2021-1629 Amazon Linux 2 URL Logo alas.aws.amazon.com/AL2/ALAS-2021-1629.html
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