CVE-2019-11759

HIGH8.8

An attacker could have caused 4 bytes of HMAC output to be written past the end of a buffer stored on the stack

Published Jan 8, 2020

Modified 1 years ago

No fix available

Details

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

WEBhttps://bugzilla.mozilla.org/show_bug.cgi?id=1577953 ADVISORYhttps://security.gentoo.org/glsa/202003-10 ADVISORYhttps://usn.ubuntu.com/4335-1/ADVISORYhttps://www.cve.org/CVERecord?id=CVE-2019-11759 WEBhttps://www.mozilla.org/security/advisories/mfsa2019-33/WEBhttps://www.mozilla.org/security/advisories/mfsa2019-34/WEBhttps://www.mozilla.org/security/advisories/mfsa2019-35/

CVSS Analysis

CVSS v3.1

8.8

Exploitability

Attack Vector

NetworkAV:N

Attack Complexity

LowAC:L

Privileges Required

NonePR:N

User Interaction

RequiredUI:R

Scope

UnchangedS:U

Impact

Confidentiality

HighC:H

Integrity

HighI:H

Availability

HighA:H

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

Ecosystems

Timeline

PublishedJan 8, 2020

ModifiedAug 4, 2024