CVE-2018-18501: Buffer Overflow
Last updated 25 August 2025
Other sources
Mozilla developers and community members Alex Gaynor, Christoph Diehl, Steven Crane, Jason Kratzer, Gary Kwong, and Christian Holler reported memory safety bugs present in Firefox 64 and Firefox ESR 60.4. Some of these bugs showed evidence of memory corruption and we presume that with enough effort that some of these could be exploited to run arbitrary code.
— Mozilla
Mozilla developers and community members Alex Gaynor, Christoph Diehl, Steven Crane, Jason Kratzer, Gary Kwong, and Christian Holler reported memory safety bugs present in Firefox 64, Firefox ESR 60.4, and Thunderbird 60.4. Some of these bugs showed evidence of memory corruption and we presume that with enough effort that some of these could be exploited to run arbitrary code.
Mozilla developers and community members reported memory safety bugs present in Firefox 64 and Firefox ESR 60.4. Some of these bugs showed evidence of memory corruption and we presume that with enough effort that some of these could be exploited to run arbitrary code.
External Reference:
https://www.mozilla.org/en-US/security/advisories/mfsa2019-02/#CVE-2018-18501
— Red Hat
Mozilla developers and community members reported memory safety bugs present in Firefox 64 and Firefox ESR 60.4. Some of these bugs showed evidence of memory corruption and we presume that with enough effort that some of these could be exploited to run arbitrary code. This vulnerability affects Thunderbird < 60.5, Firefox ESR < 60.5, and Firefox < 65.
— Launchpad
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
Thunderbirdto a version that resolves this vulnerability.Fixed in 60.5 - Upgrade
Upgrade
Firefoxto a version that resolves this vulnerability.Fixed in 65 - Upgrade
Upgrade
Firefox ESRto a version that resolves this vulnerability.Fixed in 60.5 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 60.5 - Upgrade
Upgrade
alpine/firefox-esrto a version that resolves this vulnerability.Fixed in 60.5.0-r0 - Upgrade
Upgrade
debian/firefoxto a version that resolves this vulnerability.Fixed in 159.0.1-1 - Upgrade
Upgrade
debian/firefox-esrto a version that resolves this vulnerability.Fixed in 140.12.0esr-1~deb12u1Fixed in 153.6.0esr-1~deb12u2Fixed in 140.15.0esr-1~deb13u1Fixed in 153.6.0esr-1~deb13u1Fixed in 153.5.1esr-1Fixed in 153.6.0esr-1 - Upgrade
Upgrade
debian/thunderbirdto a version that resolves this vulnerability.Fixed in 1:140.12.0esr-1~deb12u1Fixed in 1:153.6.0esr-1~deb12u2Fixed in 1:140.12.0esr-1~deb13u1Fixed in 1:153.6.0esr-1~deb13u1Fixed in 1:153.5.0esr-1Fixed in 1:153.6.0esr-1
Event History
Parent advisories
This vulnerability appears in the following advisories.
Peer vulnerabilities
Found alongside the following vulnerabilities.
Frequently Asked Questions
What is the severity of CVE-2018-18501?
CVE-2018-18501 is classified as a medium severity vulnerability due to its potential for memory corruption.
How do I fix CVE-2018-18501?
To fix CVE-2018-18501, update your Firefox or Thunderbird to version 60.5 or later, or your Firefox ESR to 65 or later.
Which software is affected by CVE-2018-18501?
CVE-2018-18501 affects Mozilla Firefox versions up to 64, Firefox ESR versions up to 60.5, and Thunderbird versions up to 60.5.
Can CVE-2018-18501 be exploited remotely?
Yes, CVE-2018-18501 can potentially be exploited remotely through specially crafted web content.
What are the symptoms of being affected by CVE-2018-18501?
Symptoms of being affected by CVE-2018-18501 may include crashes or unexpected behavior in affected Firefox or Thunderbird applications.