critical
9.1
CWE
125
Advisory Published
CVE Published
Updated

CVE-2020-12403

First published: Mon Jul 27 2020(Updated: )

A flaw was found in the way CHACHA20-POLY1305 was implemented in NSS in versions before 3.55. When using multi-part Chacha20, it could cause out-of-bounds reads. This issue was fixed by explicitly disabling multi-part ChaCha20 (which was not functioning correctly) and strictly enforcing tag length. The highest threat from this vulnerability is to confidentiality and system availability.

Credit: security@mozilla.org

Affected SoftwareAffected VersionHow to fix
redhat/nspr<0:4.25.0-2.el7_9
0:4.25.0-2.el7_9
redhat/nss<0:3.53.1-3.el7_9
0:3.53.1-3.el7_9
redhat/nss-softokn<0:3.53.1-6.el7_9
0:3.53.1-6.el7_9
redhat/nss-util<0:3.53.1-1.el7_9
0:3.53.1-1.el7_9
redhat/nss-softokn<0:3.28.3-10.el7_4
0:3.28.3-10.el7_4
redhat/nss<0:3.36.0-9.el7_6
0:3.36.0-9.el7_6
redhat/nss-softokn<0:3.36.0-7.el7_6
0:3.36.0-7.el7_6
redhat/nss-softokn<0:3.44.0-9.el7_7
0:3.44.0-9.el7_7
redhat/nss<0:3.53.1-17.el8_3
0:3.53.1-17.el8_3
redhat/nss<3.55
3.55
IBM Cognos Analytics<=12.0.0-12.0.3
IBM Cognos Analytics<=11.2.0-11.2.4 FP4
Mozilla Network Security Services<3.55

Remedy

https://bugzilla.redhat.com/show_bug.cgi?id=1868931

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is CVE-2020-12403?

    CVE-2020-12403 is a vulnerability in Mozilla Network Security Services (NSS) that can allow a remote attacker to obtain sensitive information.

  • How severe is CVE-2020-12403?

    CVE-2020-12403 has a severity rating of 9.1 (Critical).

  • What is the affected software by CVE-2020-12403?

    The affected software by CVE-2020-12403 includes Mozilla Firefox, IBM Cloud Pak for Security (CP4S), and Red Hat packages: nss, nspr, nss-softokn, and nss-util with specific versions.

  • How can a remote attacker exploit CVE-2020-12403?

    A remote attacker can exploit CVE-2020-12403 by persuading a victim to visit a specially-crafted website.

  • Where can I find more information about CVE-2020-12403?

    You can find more information about CVE-2020-12403 at the following references: [Link 1](https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1636771), [Link 2](https://access.redhat.com/security/cve/CVE-2020-12403), [Link 3](https://bugzilla.mozilla.org/show_bug.cgi?id=1636771).

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