CVE-2019-11759: Buffer Overflow
First published: Tue Oct 22 2019(Updated: )
A flaw was discovered in both Firefox and Thunderbird where 4 bytes of a HMAC output could be written past the end of a buffer stored on the memory stack. This could allow an attacker to execute arbitrary code or lead to a crash. This flaw can be exploited over the network.
Credit: security@mozilla.org security@mozilla.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/firefox | <0:68.2.0-4.el6_10 | 0:68.2.0-4.el6_10 |
| redhat/thunderbird | <0:68.2.0-2.el6_10 | 0:68.2.0-2.el6_10 |
| redhat/firefox | <0:68.2.0-1.el7_7 | 0:68.2.0-1.el7_7 |
| redhat/thunderbird | <0:68.2.0-1.el7_7 | 0:68.2.0-1.el7_7 |
| redhat/firefox | <0:68.2.0-2.el8_0 | 0:68.2.0-2.el8_0 |
| redhat/thunderbird | <0:68.2.0-1.el8_0 | 0:68.2.0-1.el8_0 |
| redhat/firefox | <68.2 | 68.2 |
| redhat/thunderbird | <68.2 | 68.2 |
| Mozilla Thunderbird | <68.2 | 68.2 |
| Mozilla Firefox ESR | <68.2 | 68.2 |
| Mozilla Firefox | <70 | 70 |
| Mozilla Firefox | <70.0 | |
| Mozilla Firefox ESR | <68.2 | |
| Mozilla Thunderbird | <68.2 | |
| Canonical Ubuntu Linux | =16.04 | |
| debian/firefox | 133.0.3-1 | |
| debian/firefox-esr | 115.14.0esr-1~deb11u1 128.5.0esr-1~deb11u1 128.3.1esr-1~deb12u1 128.5.0esr-1~deb12u1 128.5.0esr-1 128.5.1esr-1 | |
| debian/thunderbird | 1:115.12.0-1~deb11u1 1:128.5.0esr-1~deb11u1 1:115.16.0esr-1~deb12u1 1:128.5.0esr-1~deb12u1 1:128.5.2esr-1 |
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Reference Links
- https://www.cve.org/CVERecord?id=CVE-2019-11759 https://nvd.nist.gov/vuln/detail/CVE-2019-11759 https://www.mozilla.org/en-US/security/advisories/mfsa2019-33/#CVE-2019-11759
- https://bugzilla.redhat.com/show_bug.cgi?id=1764440
- https://access.redhat.com/errata/RHSA-2019:3281
- https://access.redhat.com/errata/RHSA-2019:3756
- https://access.redhat.com/errata/RHSA-2019:3193
- https://access.redhat.com/errata/RHSA-2019:3210
- https://access.redhat.com/errata/RHSA-2019:3196
- https://access.redhat.com/errata/RHSA-2019:3237
- https://access.redhat.com/security/cve/cve-2019-11759
- https://bugzilla.mozilla.org/show_bug.cgi?id=1577953
- https://www.mozilla.org/security/advisories/mfsa2019-33/
- https://www.mozilla.org/security/advisories/mfsa2019-34/
- https://www.mozilla.org/security/advisories/mfsa2019-35/
- https://security.gentoo.org/glsa/202003-10
- https://usn.ubuntu.com/4335-1/
- https://launchpad.net/bugs/cve/CVE-2019-11759
- https://www.mozilla.org/en-US/security/advisories/mfsa2019-33/#CVE-2019-11759
- https://www.mozilla.org/en-US/security/advisories/mfsa2019-35/
- https://www.mozilla.org/en-US/security/advisories/mfsa2019-33/
- https://www.mozilla.org/en-US/security/advisories/mfsa2019-33/#CVE-2019-11764
- https://www.mozilla.org/en-US/security/advisories/mfsa2019-34/
- https://www.mozilla.org/en-US/security/advisories/mfsa2019-34/#CVE-2019-11759
- https://www.mozilla.org/en-US/security/advisories/mfsa2019-35/#CVE-2019-11759
- https://security-tracker.debian.org/tracker/CVE-2019-11759
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-11759
- https://nvd.nist.gov/vuln/detail/CVE-2019-11759
- https://ubuntu.com/security/CVE-2019-11759
Parent vulnerabilities
(Appears in the following advisories)
Peer vulnerabilities
(Found alongside the following vulnerabilities)
Frequently Asked Questions
What is CVE-2019-11759?
CVE-2019-11759 is a vulnerability that could allow an attacker to execute arbitrary code or cause a crash by writing 4 bytes of HMAC output past the end of a buffer stored on the stack.
Which software versions are affected by CVE-2019-11759?
Firefox versions earlier than 70, Thunderbird versions earlier than 68.2, and Firefox ESR versions earlier than 68.2 are affected by CVE-2019-11759.
What is the severity of CVE-2019-11759?
CVE-2019-11759 has a high severity rating of 8.8.
How can this vulnerability be fixed?
To fix CVE-2019-11759, update Firefox to version 70 or later, Thunderbird to version 68.2 or later, and Firefox ESR to version 68.2 or later.
Where can I find more information about CVE-2019-11759?
More information about CVE-2019-11759 can be found in the following references: [Mozilla Bugzilla](https://bugzilla.mozilla.org/show_bug.cgi?id=1577953), [Mozilla Security Advisory](https://www.mozilla.org/en-US/security/advisories/mfsa2019-33/), [Mozilla Security Advisory](https://www.mozilla.org/en-US/security/advisories/mfsa2019-35/).
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