VULNERABILITY

Amazon Linux 2023: CVE-2021-43527: Critical priority package update for nss

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Amazon Linux 2023: CVE-2021-43527: Critical priority package update for nss

Severity
10
CVSS
(AV:N/AC:L/Au:N/C:C/I:C/A:C)
Published
12/01/2021
Created
02/14/2025
Added
02/17/2025
Modified
02/17/2025

Description

NSS (Network Security Services) versions prior to 3.73 or 3.68.1 ESR are vulnerable to a heap overflow when handling DER-encoded DSA or RSA-PSS signatures. Applications using NSS for handling signatures encoded within CMS, S/MIME, PKCS \#7, or PKCS \#12 are likely to be impacted. Applications using NSS for certificate validation or other TLS, X.509, OCSP or CRL functionality may be impacted, depending on how they configure NSS. *Note: This vulnerability does NOT impact Mozilla Firefox.* However, email clients and PDF viewers that use NSS for signature verification, such as Thunderbird, LibreOffice, Evolution and Evince are believed to be impacted. This vulnerability affects NSS < 3.73 and NSS < 3.68.1. A remote code execution flaw was found in the way NSS verifies certificates. This flaw allows an attacker posing as an SSL/TLS server to trigger this issue in a client application compiled with NSS when it tries to initiate an SSL/TLS connection. Similarly, a server application compiled with NSS, which processes client certificates, can receive a malicious certificate via a client, triggering the flaw. The highest threat to this vulnerability is confidentiality, integrity, as well as system availability.

Solution(s)

  • amazon-linux-2023-upgrade-nspr
  • amazon-linux-2023-upgrade-nspr-debuginfo
  • amazon-linux-2023-upgrade-nspr-devel
  • amazon-linux-2023-upgrade-nss
  • amazon-linux-2023-upgrade-nss-debuginfo
  • amazon-linux-2023-upgrade-nss-debugsource
  • amazon-linux-2023-upgrade-nss-devel
  • amazon-linux-2023-upgrade-nss-pkcs11-devel
  • amazon-linux-2023-upgrade-nss-softokn
  • amazon-linux-2023-upgrade-nss-softokn-debuginfo
  • amazon-linux-2023-upgrade-nss-softokn-devel
  • amazon-linux-2023-upgrade-nss-softokn-freebl
  • amazon-linux-2023-upgrade-nss-softokn-freebl-debuginfo
  • amazon-linux-2023-upgrade-nss-softokn-freebl-devel
  • amazon-linux-2023-upgrade-nss-sysinit
  • amazon-linux-2023-upgrade-nss-sysinit-debuginfo
  • amazon-linux-2023-upgrade-nss-tools
  • amazon-linux-2023-upgrade-nss-tools-debuginfo
  • amazon-linux-2023-upgrade-nss-util
  • amazon-linux-2023-upgrade-nss-util-debuginfo
  • amazon-linux-2023-upgrade-nss-util-devel

References

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