CVE-2020-16042: Uninitialized Use in V8

Published Nov 23, 2020
·
Updated

Uninitialized Use in V8 in Google Chrome prior to 87.0.4280.88 allowed a remote attacker to obtain potentially sensitive information from process memory via a crafted HTML page.

Other sources

When a BigInt was right-shifted the backing store was not properly cleared, allowing uninitialized memory to be read.

— Mozilla

Credit

André Bargull

Affected Software

49 affected componentsFixes available
debian/chromium
90.0.4430.212-1~deb10u1116.0.5845.180-1~deb11u1120.0.6099.129-1~deb11u1119.0.6045.199-1~deb12u1120.0.6099.129-1~deb12u1120.0.6099.129-1
debian/firefox
121.0-2
debian/firefox-esr
91.12.0esr-1~deb10u1115.6.0esr-1~deb10u1102.15.0esr-1~deb11u1115.6.0esr-1~deb11u1115.5.0esr-1~deb12u1115.6.0esr-1~deb12u1115.6.0esr-1
debian/thunderbird
1:91.12.0-1~deb10u11:115.6.0-1~deb10u11:102.13.1-1~deb11u11:115.6.0-1~deb11u11:115.5.0-1~deb12u11:115.6.0-1~deb12u11:115.6.0-1
Mozilla Thunderbird<78.6
78.6
Mozilla Firefox<84
84
Mozilla Firefox ESR<78.6
78.6
Google Chrome<87.0.4280.88
87.0.4280.88
Google Chrome<87.0.4280.88
alpine/firefox<84.0.1-r0
84.0.1-r0
alpine/firefox<84.0.1-r0
84.0.1-r0
alpine/firefox<84.0.1-r0
84.0.1-r0
alpine/firefox<84.0.1-r0
84.0.1-r0
alpine/firefox<84.0.1-r0
84.0.1-r0
alpine/firefox<84.0.1-r0
84.0.1-r0
alpine/firefox<84.0.1-r0
84.0.1-r0
alpine/firefox<84.0.1-r0
84.0.1-r0
alpine/firefox<84.0.1-r0
84.0.1-r0
alpine/firefox<84.0.1-r0
84.0.1-r0
alpine/firefox<84.0.1-r0
84.0.1-r0
alpine/firefox<84.0.1-r0
84.0.1-r0
alpine/firefox-esr<78.6.0-r0
78.6.0-r0
alpine/firefox-esr<78.6.0-r0
78.6.0-r0
alpine/firefox-esr<78.6.0-r0
78.6.0-r0
alpine/firefox-esr<78.6.0-r0
78.6.0-r0
alpine/firefox-esr<78.6.0-r0
78.6.0-r0
alpine/firefox-esr<78.6.0-r0
78.6.0-r0
alpine/firefox-esr<78.6.0-r0
78.6.0-r0
alpine/firefox-esr<78.6.0-r0
78.6.0-r0
alpine/firefox-esr<78.6.0-r0
78.6.0-r0
alpine/firefox-esr<78.6.0-r0
78.6.0-r0
alpine/firefox-esr<78.6.0-r0
78.6.0-r0
alpine/firefox-esr<78.6.0-r0
78.6.0-r0
alpine/librewolf<84.0.1-r0
84.0.1-r0
alpine/librewolf<84.0.1-r0
84.0.1-r0
alpine/librewolf<84.0.1-r0
84.0.1-r0
alpine/librewolf<84.0.1-r0
84.0.1-r0
alpine/mozjs78<78.6.0-r0
78.6.0-r0
alpine/mozjs78<78.6.0-r0
78.6.0-r0
alpine/mozjs78<78.6.0-r0
78.6.0-r0
alpine/mozjs78<78.6.0-r0
78.6.0-r0
alpine/thunderbird<78.6.1-r0
78.6.1-r0
alpine/thunderbird<78.6.1-r0
78.6.1-r0
alpine/thunderbird<78.6.1-r0
78.6.1-r0
alpine/thunderbird<78.6.1-r0
78.6.1-r0
alpine/thunderbird<78.6.1-r0
78.6.1-r0
alpine/thunderbird<78.6.1-r0
78.6.1-r0
alpine/thunderbird<78.6.1-r0
78.6.1-r0
alpine/thunderbird<78.6.1-r0
78.6.1-r0

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade debian/chromium to a version that resolves this vulnerability.

    Fixed in 90.0.4430.212-1~deb10u1Fixed in 116.0.5845.180-1~deb11u1Fixed in 120.0.6099.129-1~deb11u1Fixed in 119.0.6045.199-1~deb12u1Fixed in 120.0.6099.129-1~deb12u1Fixed in 120.0.6099.129-1
  2. Upgrade

    Upgrade debian/firefox to a version that resolves this vulnerability.

    Fixed in 121.0-2
  3. Upgrade

    Upgrade debian/firefox-esr to a version that resolves this vulnerability.

    Fixed in 91.12.0esr-1~deb10u1Fixed in 115.6.0esr-1~deb10u1Fixed in 102.15.0esr-1~deb11u1Fixed in 115.6.0esr-1~deb11u1Fixed in 115.5.0esr-1~deb12u1Fixed in 115.6.0esr-1~deb12u1Fixed in 115.6.0esr-1
  4. Upgrade

    Upgrade debian/thunderbird to a version that resolves this vulnerability.

    Fixed in 1:91.12.0-1~deb10u1Fixed in 1:115.6.0-1~deb10u1Fixed in 1:102.13.1-1~deb11u1Fixed in 1:115.6.0-1~deb11u1Fixed in 1:115.5.0-1~deb12u1Fixed in 1:115.6.0-1~deb12u1Fixed in 1:115.6.0-1
  5. Upgrade

    Upgrade Thunderbird to a version that resolves this vulnerability.

    Fixed in 78.6
  6. Upgrade

    Upgrade Firefox to a version that resolves this vulnerability.

    Fixed in 84
  7. Upgrade

    Upgrade Firefox ESR to a version that resolves this vulnerability.

    Fixed in 78.6
  8. Upgrade

    Upgrade Google Chrome (Trace Event) to a version that resolves this vulnerability.

    Fixed in 87.0.4280.88
  9. Upgrade

    Upgrade alpine/firefox to a version that resolves this vulnerability.

    Fixed in 84.0.1-r0
  10. Upgrade

    Upgrade alpine/firefox-esr to a version that resolves this vulnerability.

    Fixed in 78.6.0-r0
  11. Upgrade

    Upgrade alpine/librewolf to a version that resolves this vulnerability.

    Fixed in 84.0.1-r0
  12. Upgrade

    Upgrade alpine/mozjs78 to a version that resolves this vulnerability.

    Fixed in 78.6.0-r0
  13. Upgrade

    Upgrade alpine/thunderbird to a version that resolves this vulnerability.

    Fixed in 78.6.1-r0

Event History

Nov 23, 2020
CVE Published
12:00 AM
Jan 8, 2021
CVE Published
via MITRE·05:54 PM
Data Sourced
via MITRE·05:54 PM
DescriptionWeakness
Data Sourced
via NVD·07:15 PM
DescriptionSeverityWeaknessAffected Software
Data Sourced
via OSV·07:15 PM
DescriptionSeverityAffected Software

Parent advisories

This vulnerability appears in the following advisories.

Peer vulnerabilities

Found alongside the following vulnerabilities.

Frequently Asked Questions

1

What is the severity of CVE-2020-16042?

CVE-2020-16042 is considered a medium severity vulnerability due to the potential exposure of sensitive information.

2

How do I fix CVE-2020-16042?

To fix CVE-2020-16042, update Google Chrome to version 87.0.4280.88 or later.

3

What software is affected by CVE-2020-16042?

CVE-2020-16042 affects Google Chrome versions prior to 87.0.4280.88 and specific versions of Chromium, Firefox, Firefox ESR, and Thunderbird.

4

What type of vulnerability is CVE-2020-16042?

CVE-2020-16042 is an uninitialized use vulnerability in the V8 JavaScript engine of Google Chrome.

5

What can an attacker achieve with CVE-2020-16042?

An attacker can potentially obtain sensitive information from process memory through a crafted HTML page with CVE-2020-16042.

Company

Resources

Contact

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