A flaw in DRBG number generation within the Network Security Services (NSS) library where the internal state V does not correctly carry bits over. The NSS library has been updated to fix this issue to address this issue and Firefox ESR 52.1 has been updated with NSS version 3.28.4. This vulnerability affects Thunderbird < 52.1, Firefox ESR < 45.9, Firefox ESR < 52.1, and Firefox < 53.
http://www.securityfocus.com/bid/97940
http://www.securitytracker.com/id/1038320
https://bugzilla.mozilla.org/show_bug.cgi?id=1345089
https://security.gentoo.org/glsa/201705-04
https://www.debian.org/security/2017/dsa-3831
https://www.debian.org/security/2017/dsa-3872
https://www.mozilla.org/security/advisories/mfsa2017-10/
https://www.mozilla.org/security/advisories/mfsa2017-11/
Source: MITRE
Published: 2018-06-11
Updated: 2019-10-03
Type: CWE-682
Base Score: 5
Vector: AV:N/AC:L/Au:N/C:N/I:P/A:N
Impact Score: 2.9
Exploitability Score: 10
Severity: MEDIUM
Base Score: 5.3
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Impact Score: 1.4
Exploitability Score: 3.9
Severity: MEDIUM