CVE-2019-11759: canonical ubuntu_linux

Modified

AliasesUBUNTU-CVE-2019-11759DEBIAN-CVE-2019-11759ALPINE-CVE-2019-11759

Published 08-01-2020Last modified 04-08-2024

Vulnerability summary

CVE-2019-11759 is a high (CVSS 8.8) vulnerability in canonical ubuntu_linux. EPSS estimates a 1.65% chance of exploitation in the next 30 days, higher than 76.4% of scored vulnerabilities.

Priority

Routine

Not severe (CVSS 8.8, network access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?

CVSS score

8.8/10

010

High · v3.1 (NVD)

EPSS score

1.65%

0%100%

Low · -0.15 pp in 30 days

KEVNot listedNot listed by any tracked catalog.

RansomwareNot flaggedNo ransomware use recorded.

Public exploits0No public exploits recorded

Timeline

08-01-2020
PublishedVulnerability first disclosed.
04-08-2024
Last modifiedVulnerability information updated.

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.

CVSS metrics

5 scores · 4 sources · 2 versions

v3.18.8v2.06.8

EPSS trend

Probability

1.65%

Chance of exploitation in the next 30 days

Percentile

76%

Versus all other CVEs

30-day change

Decrease -0.15 pp

From 1.80% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs

CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

CWE-120Buffer Copy without Checking Size of InputThe product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer.

Affected systems

Version check

Known conditions: network-reachable, no authentication, user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu4 products

firefox< 70.0+build2-0ubuntu0.16.04.1 | < 70.0+build2-0ubuntu0.18.04.1 | < 70.0+build2-0ubuntu1
mozjs38All versions (No fix recorded)
mozjs52All versions (No fix recorded)
thunderbird< 1:68.7.0+build1-0ubuntu0.16.04.2 | < 1:68.2.1+build1-0ubuntu0.18.04.1

Alpine3 products