Mozilla Network Security Service (NSS): Denial of service

Mozilla Network Security Service (NSS): Denial of service A vulnerability in NSS might allow remote attackers to cause a Denial of Service condition. nss 2020-12-23 2020-12-23 750254 remote 3.58 3.58

The Mozilla Network Security Service (NSS) is a library implementing security features like SSL v.2/v.3, TLS, PKCS #5, PKCS #7, PKCS #11, PKCS #12, S/MIME and X.509 certificates.

A flaw was found in the way Mozilla Network Security Service (NSS) handled CCS (ChangeCipherSpec) messages in TLS 1.3.

A remote attacker could send multiple crafted CSS messages in row after ClientHello message to a server application linked against NSS library, possibly resulting in a Denial of Service condition.

Disable TLS 1.3 protocol.

All NSS users should upgrade to the latest version:


      # emerge --sync
      # emerge --ask --oneshot --verbose ">=dev-libs/nss-3.58"

CVE-2020-25648 whissi whissi