Improper Certificate Validation

Affecting nss package, versions <2:3.42.1-1+deb10u1

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NVD Description

Note: Versions mentioned in the description apply to the upstream nss package. See Remediation section below for Debian:10 relevant versions.

A vulnerability exists where it possible to force Network Security Services (NSS) to sign CertificateVerify with PKCS#1 v1.5 signatures when those are the only ones advertised by server in CertificateRequest in TLS 1.3. PKCS#1 v1.5 signatures should not be used for TLS 1.3 messages. This vulnerability affects Firefox < 68.

Remediation

Upgrade Debian:10 nss to version 2:3.42.1-1+deb10u1 or higher.

References

CVSS Score

5.3
medium severity
  • Attack Vector
    Network
  • Attack Complexity
    Low
  • Privileges Required
    None
  • User Interaction
    None
  • Scope
    Unchanged
  • Confidentiality
    None
  • Integrity
    Low
  • Availability
    None
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
CVE
CVE-2019-11727
CWE
CWE-295
Snyk ID
SNYK-DEBIAN10-NSS-453482
Disclosed
23 Jul, 2019
Published
24 Jul, 2019