CVE-2019-11745

MEDIUM

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.

References

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/

Details

Source: MITRE

Published: 2020-01-08

Updated: 2020-09-30

Type: CWE-787

Risk Information

CVSS v2.0

Base Score: 6.8

Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P

Impact Score: 6.4

Exploitability Score: 8.6

Severity: MEDIUM

CVSS v3.0

Base Score: 8.8

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

Impact Score: 5.9

Exploitability Score: 2.8

Severity: HIGH