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Vulnerability details: VCID-3wzm-xx4e-aaaq
Vulnerability ID VCID-3wzm-xx4e-aaaq
Aliases CVE-2019-9796
Summary 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.
Status Published
Exploitability 0.5
Weighted Severity 9.0
Risk 4.5
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-416 Use After Free
System Score Found at
generic_textual Medium http://people.canonical.com/~ubuntu-security/cve/2019/CVE-2019-9796.html
cvssv3 9.8 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2019-9796.json
epss 0.00756 https://api.first.org/data/v1/epss?cve=CVE-2019-9796
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epss 0.00756 https://api.first.org/data/v1/epss?cve=CVE-2019-9796
epss 0.00756 https://api.first.org/data/v1/epss?cve=CVE-2019-9796
epss 0.00756 https://api.first.org/data/v1/epss?cve=CVE-2019-9796
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epss 0.00756 https://api.first.org/data/v1/epss?cve=CVE-2019-9796
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epss 0.01125 https://api.first.org/data/v1/epss?cve=CVE-2019-9796
epss 0.01125 https://api.first.org/data/v1/epss?cve=CVE-2019-9796
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epss 0.02461 https://api.first.org/data/v1/epss?cve=CVE-2019-9796
rhbs high https://bugzilla.redhat.com/show_bug.cgi?id=1690681
generic_textual Medium https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-18506
generic_textual Negligible https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-9788
generic_textual Medium https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-9790
generic_textual Medium https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-9791
generic_textual Medium https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-9792
generic_textual Medium https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-9793
generic_textual Medium https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-9795
generic_textual Medium https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-9796
cvssv3 7.5 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv2 7.5 https://nvd.nist.gov/vuln/detail/CVE-2019-9796
cvssv3 9.8 https://nvd.nist.gov/vuln/detail/CVE-2019-9796
archlinux Critical https://security.archlinux.org/AVG-925
generic_textual Low https://ubuntu.com/security/notices/USN-3918-1
generic_textual Low https://ubuntu.com/security/notices/USN-3918-2
generic_textual Medium https://ubuntu.com/security/notices/USN-3927-1
generic_textual Low https://usn.ubuntu.com/usn/usn-3918-1
generic_textual Low https://usn.ubuntu.com/usn/usn-3918-2
generic_textual Medium https://usn.ubuntu.com/usn/usn-3927-1
generic_textual critical https://www.mozilla.org/en-US/security/advisories/mfsa2019-07
generic_textual Medium https://www.mozilla.org/en-US/security/advisories/mfsa2019-07/#CVE-2019-9796
generic_textual critical https://www.mozilla.org/en-US/security/advisories/mfsa2019-08
generic_textual Medium https://www.mozilla.org/en-US/security/advisories/mfsa2019-08/#CVE-2019-9796
generic_textual critical https://www.mozilla.org/en-US/security/advisories/mfsa2019-11
generic_textual Medium https://www.mozilla.org/en-US/security/advisories/mfsa2019-11/#CVE-2019-9796
Reference id Reference type URL
http://people.canonical.com/~ubuntu-security/cve/2019/CVE-2019-9796.html
https://access.redhat.com/errata/RHSA-2019:0966
https://access.redhat.com/errata/RHSA-2019:1144
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2019-9796.json
https://api.first.org/data/v1/epss?cve=CVE-2019-9796
https://bugzilla.mozilla.org/show_bug.cgi?id=1531277
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-18506
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-9788
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-9790
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-9791
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-9792
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-9793
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-9795
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-9796
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://ubuntu.com/security/notices/USN-3918-1
https://ubuntu.com/security/notices/USN-3918-2
https://ubuntu.com/security/notices/USN-3927-1
https://usn.ubuntu.com/usn/usn-3918-1
https://usn.ubuntu.com/usn/usn-3918-2
https://usn.ubuntu.com/usn/usn-3927-1
https://www.mozilla.org/en-US/security/advisories/mfsa2019-07/#CVE-2019-9796
https://www.mozilla.org/en-US/security/advisories/mfsa2019-08/#CVE-2019-9796
https://www.mozilla.org/en-US/security/advisories/mfsa2019-11/#CVE-2019-9796
https://www.mozilla.org/security/advisories/mfsa2019-07/
https://www.mozilla.org/security/advisories/mfsa2019-08/
https://www.mozilla.org/security/advisories/mfsa2019-11/
1690681 https://bugzilla.redhat.com/show_bug.cgi?id=1690681
ASA-201903-11 https://security.archlinux.org/ASA-201903-11
AVG-925 https://security.archlinux.org/AVG-925
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
CVE-2019-9796 https://nvd.nist.gov/vuln/detail/CVE-2019-9796
mfsa2019-07 https://www.mozilla.org/en-US/security/advisories/mfsa2019-07
mfsa2019-08 https://www.mozilla.org/en-US/security/advisories/mfsa2019-08
mfsa2019-11 https://www.mozilla.org/en-US/security/advisories/mfsa2019-11
USN-3918-1 https://usn.ubuntu.com/3918-1/
USN-3918-2 https://usn.ubuntu.com/3918-2/
No exploits are available.
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2019-9796.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P Found at https://nvd.nist.gov/vuln/detail/CVE-2019-9796
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2019-9796
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.7096
EPSS Score 0.00756
Published At March 28, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
There are no relevant records.