QID 357036

Date Published: 2024-02-05

QID 357036: Amazon Linux Security Advisory for nss : ALAS2023-2024-492

It was discovered that the numerical library used in nss for rsa cryptography leaks information whether high order bits of the rsa decryption result are zero.
This information can be used to mount a bleichenbacher or manger like attack against all rsa decryption operations.
As the leak happens before any padding operations, it affects all padding modes: pkcs#1 v1.5, oaep, and rsasvp.
Both api level calls and tls server operation are affected. (
( CVE-2023-5388)



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.

Successful exploitation of this vulnerability could lead to a securitybreach or could affect integrity, availability, and confidentiality.

  • CVSS V3 rated as Critical - 8.6 severity.
  • CVSS V2 rated as Medium - 5.4 severity.
    • Solution
    Please refer to Amazon advisory: ALAS2023-2024-492 for affected packages and patching details, or update with your package manager.
    Vendor References

    CVEs related to QID 357036

    CVE-2023-5388 |
    Software Advisories
    Advisory ID Software Component Link
    ALAS2023-2024-492 amazon linux 2023 URL Logo alas.aws.amazon.com/AL2023/ALAS-2024-492.html
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