CVE-2016-9063: Integer Overflow

Published Nov 15, 2016
·
Updated

An integer overflow during the parsing of XML using the Expat library.

Other sources

libexpat. Multiple issues were addressed by updating to version 2.2.1

Credit

CVE-2016-9063, CVE-2017-9233

Affected Software

17 affected componentsFixes available
debian/expat
2.2.6-2+deb10u42.2.6-2+deb10u62.2.10-2+deb11u52.5.0-12.5.0-2
debian/firefox
118.0.2-1
debian/firefox-esr
91.12.0esr-1~deb10u1115.3.1esr-1~deb10u1102.15.0esr-1~deb11u1115.3.1esr-1~deb11u1102.15.1esr-1~deb12u1115.3.0esr-1~deb12u1115.3.0esr-1
Apple tvOS<11
11
Apple macOS High Sierra<10.13
10.13
Apple WatchOS<4
4
Mozilla Firefox<50
50
Apple iOS<11
11
Mozilla Firefox<50
Debian Debian Linux=8.0
Debian Debian Linux=9.0
Debian Debian Linux=10.0
Python Python>=2.7.0<2.7.15
Python Python>=3.3.0<3.3.7
Python Python>=3.4.0<3.4.7
Python Python>=3.5.0<3.5.4
Python Python>=3.6.0<3.6.2

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

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

    Fixed in 2.2.6-2+deb10u4Fixed in 2.2.6-2+deb10u6Fixed in 2.2.10-2+deb11u5Fixed in 2.5.0-1Fixed in 2.5.0-2
  2. Upgrade

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

    Fixed in 118.0.2-1
  3. Upgrade

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

    Fixed in 91.12.0esr-1~deb10u1Fixed in 115.3.1esr-1~deb10u1Fixed in 102.15.0esr-1~deb11u1Fixed in 115.3.1esr-1~deb11u1Fixed in 102.15.1esr-1~deb12u1Fixed in 115.3.0esr-1~deb12u1Fixed in 115.3.0esr-1
  4. Upgrade

    Upgrade tvOS to a version that resolves this vulnerability.

    Fixed in 11
  5. Upgrade

    Upgrade macOS High Sierra to a version that resolves this vulnerability.

    Fixed in 10.13
  6. Upgrade

    Upgrade Apple iOS, iPadOS, and watchOS to a version that resolves this vulnerability.

    Fixed in 4
  7. Upgrade

    Upgrade Firefox to a version that resolves this vulnerability.

    Fixed in 50
  8. Upgrade

    Upgrade Apple iOS and iPadOS to a version that resolves this vulnerability.

    Fixed in 11
  9. Upgrade

    Upgrade libexpat to a version that resolves this vulnerability.

    Fixed in 2.2.1

Event History

Nov 15, 2016
CVE Published
12:00 AM
Jun 11, 2018
CVE Published
via MITRE·09:00 PM
Data Sourced
via MITRE·09:00 PM
DescriptionWeakness
Data Sourced
via NVD·09:29 PM
DescriptionSeverityWeaknessAffected Software

Parent advisories

This vulnerability appears in the following advisories.

Peer vulnerabilities

Found alongside the following vulnerabilities.

Frequently Asked Questions

1

What is CVE-2016-9063?

CVE-2016-9063 is a vulnerability that involves an integer overflow during the parsing of XML using the Expat library.

2

Which software is affected by CVE-2016-9063?

Firefox versions prior to 50, Mozilla Firefox, Debian Linux 8.0, Debian Linux 9.0, Debian Linux 10.0, Python 2.7.0 to 2.7.15, Python 3.3.0 to 3.3.7, Python 3.4.0 to 3.4.7, Python 3.5.0 to 3.5.4, Python 3.6.0 to 3.6.2, macOS High Sierra (up to version 10.13), iOS (up to version 11), tvOS (up to version 11), and watchOS (up to version 4) are affected by this vulnerability.

3

What is the severity of CVE-2016-9063?

CVE-2016-9063 has a severity keyword of 'critical' and a severity value of 9.8.

4

How do I fix CVE-2016-9063 in Firefox?

To fix CVE-2016-9063 in Firefox, update to version 50 or later.

5

How do I fix CVE-2016-9063 in the Expat library?

To fix CVE-2016-9063 in the Expat library, update to version 2.2.1 or later.

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2026 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203