Improper Certificate Validation Affecting nss-util package, versions <0:3.53.1-1.58.amzn1
Threat Intelligence
Exploit maturity not defined.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-AMZN201803-NSSUTIL-1726192
- published27 Sept 2021
- disclosed23 Jul 2019
Introduced: 23 Jul 2019
CVE-2019-11727 (opens in a new tab)How to fix?
Upgrade Amazon-Linux:2018.03 nss-util to version 0:3.53.1-1.58.amzn1 or higher.
This issue was patched in ALAS-2021-1522.
NVD Description
Note: Versions mentioned in the description apply only to the upstream nss-util package and not the nss-util package as distributed by Amazon-Linux.
See How to fix? for Amazon-Linux:2018.03 relevant fixed versions and status.
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.
References
- http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-11727
- https://security.gentoo.org/glsa/201908-12
- https://bugzilla.mozilla.org/show_bug.cgi?id=1552208
- https://www.mozilla.org/security/advisories/mfsa2019-21/
- https://access.redhat.com/errata/RHSA-2019:1951
- http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00009.html
- http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00010.html
- http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00011.html
- http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00017.html
- http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00006.html