CVE-2019-11745 Information

Description

When encrypting with a block cipher if a call to NSC_EncryptUpdate was made with data smaller than the block size a small out of bounds write could occur. This could have caused heap corruption and a potentially exploitable crash. This vulnerability affects Thunderbird 68.3 Firefox ESR 68.3 and Firefox 71.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Reference

http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00000.html http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00001.html http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00006.html https://access.redhat.com/errata/RHSA-2020:0243 https://access.redhat.com/errata/RHSA-2020:0466 https://bugzilla.mozilla.org/show_bug.cgi?id=1586176 https://lists.debian.org/debian-lts-announce/2020/09/msg00029.html https://security.gentoo.org/glsa/202003-02 https://security.gentoo.org/glsa/202003-10 https://security.gentoo.org/glsa/202003-37 https://usn.ubuntu.com/4241-1/ https://usn.ubuntu.com/4335-1/ https://www.mozilla.org/security/advisories/mfsa2019-36/ https://www.mozilla.org/security/advisories/mfsa2019-37/ https://www.mozilla.org/security/advisories/mfsa2019-38/

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

REQUIRED

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

8.8