CVE-2019-11759

MEDIUM

Description

An attacker could have caused 4 bytes of HMAC output to be written past the end of a buffer stored on the stack. This could be used by an attacker to execute arbitrary code or more likely lead to a crash. This vulnerability affects Firefox < 70, Thunderbird < 68.2, and Firefox ESR < 68.2.

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1577953

https://security.gentoo.org/glsa/202003-10

https://www.mozilla.org/security/advisories/mfsa2019-33/

https://www.mozilla.org/security/advisories/mfsa2019-34/

https://www.mozilla.org/security/advisories/mfsa2019-35/

Details

Source: MITRE

Published: 2020-01-08

Updated: 2020-03-14

Type: CWE-120

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