A use-after-free vulnerability can occur while parsing an HTML5 stream in concert with custom HTML elements.
A use-after-free vulnerability can occur while parsing an HTML5 stream in concert with custom HTML elements. This results in the stream parser object being freed while still in use, leading to a potentially exploitable crash. This vulnerability affects Thunderbird < 60.5, Firefox ESR < 60.5, and Firefox < 65.
Noroxi analysis
No Noroxi analysis for this record yet
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We use this product, ask for help- Published
- Feb 5, 2019
- Updated
- Jun 16, 2026
- EPSS
- 12.7% · 96th percentile
- CWE
- CWE-416
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Report tools
Action score
43
Plan
Add it to your regular patch cycle.
- CVSS
- 39 / 40 · 9.8 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 4 / 30 · 12.7%
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| mozilla | firefox | cpe:2.3:a:mozilla:firefox |
| mozilla | firefox esr | cpe:2.3:a:mozilla:firefox_esr |
| mozilla | thunderbird | cpe:2.3:a:mozilla:thunderbird |
| canonical | ubuntu linux | cpe:2.3:o:canonical:ubuntu_linux |
| debian | debian linux | cpe:2.3:o:debian:debian_linux |
| redhat | enterprise linux desktop | cpe:2.3:o:redhat:enterprise_linux_desktop |
| redhat | enterprise linux server | cpe:2.3:o:redhat:enterprise_linux_server |
| redhat | enterprise linux server aus | cpe:2.3:o:redhat:enterprise_linux_server_aus |
| redhat | enterprise linux server eus | cpe:2.3:o:redhat:enterprise_linux_server_eus |
| redhat | enterprise linux server tus | cpe:2.3:o:redhat:enterprise_linux_server_tus |
| redhat | enterprise linux workstation | cpe:2.3:o:redhat:enterprise_linux_workstation |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- canonical ubuntu linux14.04
- canonical ubuntu linux16.04
- canonical ubuntu linux18.04
- canonical ubuntu linux18.10
- debian debian linux8.0
- debian debian linux9.0
- mozilla firefoxbefore 65.0
- mozilla firefox esrbefore 60.5
- mozilla thunderbirdbefore 60.5
- redhat enterprise linux desktop6.0
- redhat enterprise linux desktop7.0
- redhat enterprise linux server6.0
- redhat enterprise linux server7.0
- redhat enterprise linux server aus7.6
- redhat enterprise linux server eus7.6
- redhat enterprise linux server tus7.6
- redhat enterprise linux workstation6.0
- redhat enterprise linux workstation7.0
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:12 | firefox-esr | before 60.5.0esr-1 | 60.5.0esr-1 |
| Debian:12 | thunderbird | before 1:60.5.0-1 | 1:60.5.0-1 |
| Debian:8 | firefox-esr | before 60.5.0esr-1~deb8u1 | 60.5.0esr-1~deb8u1 |
| Debian:8 | thunderbird | before 1:60.5.1-1~deb8u1 | 1:60.5.1-1~deb8u1 |
| Debian:9 | firefox-esr | before 60.5.0esr-1~deb9u1 | 60.5.0esr-1~deb9u1 |
| Debian:9 | thunderbird | before 1:60.5.1-1~deb9u1 | 1:60.5.1-1~deb9u1 |
| openSUSE:Leap 15.0 | mozilla-nss | before 3.41.1-lp150.2.20.1 | 3.41.1-lp150.2.20.1 |
| openSUSE:Leap 15.0 | MozillaFirefox | before 60.8.0-lp150.3.62.1 | 60.8.0-lp150.3.62.1 |
| Red Hat:enterprise_linux:6::client | firefox | before 0:60.5.0-2.el6 | 0:60.5.0-2.el6 |
| Red Hat:enterprise_linux:6::client | firefox-debuginfo | before 0:60.5.0-2.el6 | 0:60.5.0-2.el6 |
| Red Hat:enterprise_linux:6::client | thunderbird | before 0:60.5.0-1.el6_10 | 0:60.5.0-1.el6_10 |
| Red Hat:enterprise_linux:6::client | thunderbird-debuginfo | before 0:60.5.0-1.el6_10 | 0:60.5.0-1.el6_10 |
| Red Hat:enterprise_linux:7::client | firefox | before 0:60.5.0-2.el7 | 0:60.5.0-2.el7 |
| Red Hat:enterprise_linux:7::client | firefox-debuginfo | before 0:60.5.0-2.el7 | 0:60.5.0-2.el7 |
| Red Hat:enterprise_linux:7::client | thunderbird | before 0:60.5.0-1.el7_6 | 0:60.5.0-1.el7_6 |
| Red Hat:enterprise_linux:7::client | thunderbird-debuginfo | before 0:60.5.0-1.el7_6 | 0:60.5.0-1.el7_6 |
| SUSE:Linux Enterprise Module for Basesystem 15 | mozilla-nss | before 3.41.1-3.13.1 | 3.41.1-3.13.1 |
| SUSE:Linux Enterprise Module for Desktop Applications 15 | MozillaFirefox | before 60.5.0-3.24.2 | 60.5.0-3.24.2 |
| SUSE:Linux Enterprise Workstation Extension 15 | MozillaThunderbird | before 60.5.0-3.20.2 | 60.5.0-3.20.2 |
| SUSE:OpenStack Cloud 7 | mozilla-nss | before 3.41.1-58.25.1 | 3.41.1-58.25.1 |
| SUSE:OpenStack Cloud 7 | MozillaFirefox | before 60.5.0esr-109.58.3 | 60.5.0esr-109.58.3 |
| SUSE:OpenStack Cloud 7 | MozillaFirefox-branding-SLE | before 60-32.5.1 | 60-32.5.1 |
| SUSE:Package Hub 12 | MozillaThunderbird | before 60.5.1-79.1 | 60.5.1-79.1 |
Same product
mozilla: all recordsOther highest-scoring records for the same primary product.
- CVE-2010-3765Mozilla Firefox 3.5.x through 3.5.14 and 3.6.x through 3.6.11, Thunderbird 3.1.6 before 3.1.6 and 3.0.x before 3.0.10, and SeaMonkey 2.x befKEV94Now
- CVE-2019-11708Insufficient vetting of parameters passed with the Prompt:Open IPC message between child and parent processes can result in the non-sandboxeKEV87Now
- CVE-2015-4495The PDF reader in Mozilla Firefox before 39.0.3, Firefox ESR 38.x before 38.1.1, and Firefox OS before 2.2 allows remote attackers to bypassKEV86Now
- CVE-2013-1690Mozilla Firefox before 22.0, Firefox ESR 17.x before 17.0.7, Thunderbird before 17.0.7, and Thunderbird ESR 17.x before 17.0.7 do not properKEV86Now
- CVE-2019-17026Incorrect alias information in IonMonkey JIT compiler for setting array elements could lead to a type confusion.KEV79This week
- CVE-2024-9680An attacker was able to achieve code execution in the content process by exploiting a use-after-free in Animation timelines.KEV76This week
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| debian:firefox-esr | 60.5.0esr-1 · Debian:12 | Package registry (OSV) |
| debian:thunderbird | 1:60.5.0-1 · Debian:12 | Package registry (OSV) |
| opensuse:mozilla-nss | 3.41.1-lp150.2.20.1 · openSUSE:Leap 15.0 | Package registry (OSV) |
| opensuse:MozillaFirefox | 60.8.0-lp150.3.62.1 · openSUSE:Leap 15.0 | Package registry (OSV) |
| red hat:firefox | 0:60.5.0-2.el6 · Red Hat:enterprise_linux:6::client | Package registry (OSV) |
| red hat:firefox-debuginfo | 0:60.5.0-2.el6 · Red Hat:enterprise_linux:6::client | Package registry (OSV) |
| red hat:thunderbird | 0:60.5.0-1.el6_10 · Red Hat:enterprise_linux:6::client | Package registry (OSV) |
| red hat:thunderbird-debuginfo | 0:60.5.0-1.el6_10 · Red Hat:enterprise_linux:6::client | Package registry (OSV) |
| suse:mozilla-nss | 3.41.1-3.13.1 · SUSE:Linux Enterprise Module for Basesystem 15 | Package registry (OSV) |
| suse:MozillaFirefox | 60.5.0-3.24.2 · SUSE:Linux Enterprise Module for Desktop Applications 15 | Package registry (OSV) |
| suse:MozillaFirefox-branding-SLE | 60-32.5.1 · SUSE:OpenStack Cloud 7 | Package registry (OSV) |
| suse:MozillaThunderbird | 60.5.0-3.20.2 · SUSE:Linux Enterprise Workstation Extension 15 | Package registry (OSV) |
Exploit status
Proof of concept available
A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.
Evidence
- Proof-of-concept repository on GitHub ×1
Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.
| Source | Kind | Date |
|---|---|---|
| Proof-of-concept repository on GitHub | stars:61 | 2019-04-18 |
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
- Published
- First PoC+71 d
- TodaySep 30, 2026+2794 d
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- high · data can be read
- Integrity
- high · data or configuration can be modified
- Availability
- high · the service can be disrupted
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
Weakness class (CWE)
CWE-416 · Use After FreeCVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
nvd-primary
Root cause
After a memory region is freed, another reference pointing to it is still used. By then, the same region may have been allocated for different data.
The bug in code
The whole CWE-416 classA representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.
Vulnerable
free(dev->buf);/* ... another thread is still running ... */process(dev->buf);Fixed
lock(&dev->lock);free(dev->buf);dev->buf = NULL;unlock(&dev->lock);Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- lists.opensuse.org/opensuse-security-announce/2019-07/msg00021.html
- www.securityfocus.com/bid/106781
- access.redhat.com/errata/RHSA-2019:0218
- access.redhat.com/errata/RHSA-2019:0219
- access.redhat.com/errata/RHSA-2019:0269
- access.redhat.com/errata/RHSA-2019:0270
- lists.debian.org/debian-lts-announce/2019/01/msg00025.html
- lists.debian.org/debian-lts-announce/2019/02/msg00024.html
- security.gentoo.org/glsa/201903-04
- security.gentoo.org/glsa/201904-07
- usn.ubuntu.com/3874-1/
- usn.ubuntu.com/3897-1/
- www.debian.org/security/2019/dsa-4376
- www.debian.org/security/2019/dsa-4392
- www.mozilla.org/security/advisories/mfsa2019-01/
- www.mozilla.org/security/advisories/mfsa2019-02/
- www.mozilla.org/security/advisories/mfsa2019-03/
Vendor advisories and official records. Exploit/PoC links are deliberately left out.