What’s Vulnerable › Vulnerabilities

CVE-2019-17005

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.9% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2020-01-08 · updated 2026-06-17
• Weakness: CWE-787

Description

The plain text serializer used a fixed-size array for the number of <ol> elements it could process; however it was possible to overflow the static-sized array leading to memory corruption and a potentially exploitable crash. This vulnerability affects Thunderbird < 68.3, Firefox ESR < 68.3, and Firefox < 71.

Affected products

• Canonical Ubuntu Linux: 16.04, 18.04, 19.10
• Mozilla Firefox: before 71.0 — fixed in 71.0
• Mozilla Firefox ESR: before 68.3 — fixed in 68.3
• Mozilla Thunderbird: before 68.3 — fixed in 68.3
• openSUSE Leap: 15.1

How to fix

Upgrade to a fixed version: Mozilla Firefox 71.0; Mozilla Firefox ESR 68.3; Mozilla Thunderbird 68.3. Check the vendor advisory for mitigations.

References

• http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00000.html
• http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00001.html
• https://access.redhat.com/errata/RHSA-2020:0292
• https://access.redhat.com/errata/RHSA-2020:0295
• https://bugzilla.mozilla.org/show_bug.cgi?id=1584170
• https://security.gentoo.org/glsa/202003-02
• https://security.gentoo.org/glsa/202003-10
• https://usn.ubuntu.com/4241-1/
• https://usn.ubuntu.com/4335-1/
• https://www.mozilla.org/security/advisories/mfsa2019-36/
• https://www.mozilla.org/security/advisories/mfsa2019-37/
• https://www.mozilla.org/security/advisories/mfsa2019-38/

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