Vulnerability Details : CVE-2019-9796
A use-after-free vulnerability can occur when the SMIL animation controller incorrectly registers with the refresh driver twice when only a single registration is expected. When a registration is later freed with the removal of the animation controller element, the refresh driver incorrectly leaves a dangling pointer to the driver's observer array. This vulnerability affects Thunderbird < 60.6, Firefox ESR < 60.6, and Firefox < 66.
Vulnerability category: Memory Corruption
Exploit prediction scoring system (EPSS) score for CVE-2019-9796
Probability of exploitation activity in the next 30 days: 0.80%
Percentile, the proportion of vulnerabilities that are scored at or less: ~ 80 % EPSS Score History EPSS FAQ
CVSS scores for CVE-2019-9796
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source |
---|---|---|---|---|---|
7.5
|
HIGH | AV:N/AC:L/Au:N/C:P/I:P/A:P |
10.0
|
6.4
|
NIST |
9.8
|
CRITICAL | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
3.9
|
5.9
|
NIST |
CWE ids for CVE-2019-9796
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Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code.Assigned by: nvd@nist.gov (Primary)
References for CVE-2019-9796
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https://access.redhat.com/errata/RHSA-2019:0966
RHSA-2019:0966 - Security Advisory - Red Hat Customer PortalThird Party Advisory
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https://www.mozilla.org/security/advisories/mfsa2019-08/
Security vulnerabilities fixed in Firefox ESR 60.6 — MozillaVendor Advisory
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https://bugzilla.mozilla.org/show_bug.cgi?id=1531277
Access DeniedIssue Tracking;Permissions Required;Vendor Advisory
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https://access.redhat.com/errata/RHSA-2019:1144
RHSA-2019:1144 - Security Advisory - Red Hat Customer PortalThird Party Advisory
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https://www.mozilla.org/security/advisories/mfsa2019-11/
Security vulnerabilities fixed in Thunderbird 60.6 — MozillaVendor Advisory
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https://www.mozilla.org/security/advisories/mfsa2019-07/
Security vulnerabilities fixed in Firefox 66 — MozillaVendor Advisory
Products affected by CVE-2019-9796
- cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
- cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
- cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*