A vulnerability in NSS might allow remote attackers to cause a Denial of Service condition.
|Package||dev-libs/nss on all architectures|
|Affected versions||< 3.58|
|Unaffected versions||>= 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"
December 23, 2020
December 23, 2020: 1