9.3

CVE-2020-15659: canonical ubuntu_linux Out-of-bounds Write

CVSS: 9.3v2.0HighModified
AliasesUBUNTU-CVE-2020-15659DEBIAN-CVE-2020-15659
Published 10-08-2020Last modified 04-08-2024
Open JSON

Vulnerability summary

CVE-2020-15659 is a high (CVSS 9.3) Out-of-bounds Write vulnerability in canonical ubuntu_linux. EPSS estimates a 2.39% chance of exploitation in the next 30 days, higher than 83.7% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.3/10
010
High · v2.0 (NVD)
EPSS score
2.39%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 30 · Related 14
DLA-2297-1DLA-2310-1DSA-4736-1DSA-4740-1MGASA-2020-0318MGASA-2020-0320

Timeline

  1. 10-08-2020
    PublishedVulnerability first disclosed.
  2. 04-08-2024
    Last modifiedVulnerability information updated.

Description

Mozilla developers and community members reported memory safety bugs present in Firefox 78 and Firefox ESR 78.0. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 79, Firefox ESR < 68.11, Firefox ESR < 78.1, Thunderbird < 68.11, and Thunderbird < 78.1.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

2.39%

Chance of exploitation in the next 30 days

Percentile

84%

Versus all other CVEs

30-day change

0.00 pp

From 2.39% on 19-09-2026

19-09-202619-10-2026
EPSS score
2.39%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Ubuntu5 products
  • firefox< 79.0+build1-0ubuntu0.16.04.2 | < 79.0+build1-0ubuntu0.18.04.1 | < 79.0+build1-0ubuntu0.20.04.1
  • mozjs38All versions (No fix recorded)
  • mozjs52All versions (No fix recorded)
  • mozjs68All versions (No fix recorded)
  • thunderbird< 1:78.8.1+build1-0ubuntu0.18.04.1 | < 1:78.7.1+build1-0ubuntu0.20.04.1
Mozilla3 products
  • firefox≥ unspecified, < 79 | < 79.0
  • firefox_esr≥ unspecified, < 68.11 | ≥ unspecified, < 78.1 | < 68.11 | ≥ 78.0, < 78.1.0
  • thunderbird≥ unspecified, < 68.11 | ≥ unspecified, < 78.1 | < 68.11 | ≥ 78.0.1, < 78.1.0
Debian2 products
  • firefox-esr< 68.11.0esr-1
  • thunderbird< 1:68.11.0-1
Canonical1 product
Opensuse1 product

5 vendors · 12 products

References

17 links
Show all 17 references