CVE-2018-18500
What it is
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.
At a glance
- Exploitability
- Can be exploited over the network without logging in. High risk of data exposure, data tampering, service disruption.
- Exploit odds
- 12.7% chance of exploitation in the next 30 days (EPSS). Higher than most.
- Fix
- A patch, advisory or fixed version is referenced. Upgrade or apply it.
Timeline
- ReservedThe CVE id was reserved by its CNA
- PublishedDisclosed publicly on CVE.org and NVD
- Last updatedMost recent change to the record
Why it ranks here
- Exploited in the wild: no, CISA does not list it.
- Exploit odds: 12.7% in the next 30 days (EPSS).
- Severity: 9.8 CRITICAL (CVSS).
- Fix: a patch or advisory is linked.
Details
- Published
- Last modified
- Exploit probability
- 12.7% · EPSS, next 30 days
- Weakness
- CWE-416 · Use after free
- Record status
- Modified
Affected
- Mozilla Firefox < 65.0
- Mozilla Firefox Esr < 60.5
- Mozilla Thunderbird < 60.5
- Canonical Ubuntu Linux 14.04
- Canonical Ubuntu Linux 16.04
- Canonical Ubuntu Linux 18.04
- Canonical Ubuntu Linux 18.10
- Debian Linux 8.0
Attack profile CVSS 3.0 · 9.8
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Raw vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Is it in your code?
Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.
Read https://cve-list.com/agent/cve/CVE-2018-18500.md and follow it. Check whether this project is affected by CVE-2018-18500. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.
Fix and advisories
- https://www.mozilla.org/security/advisories/mfsa2019-01/
- https://www.mozilla.org/security/advisories/mfsa2019-02/
- https://www.mozilla.org/security/advisories/mfsa2019-03/
- https://www.mozilla.org/security/advisories/mfsa2019-01/
- https://www.mozilla.org/security/advisories/mfsa2019-02/
- https://www.mozilla.org/security/advisories/mfsa2019-03/
References
- http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00021.html
- http://www.securityfocus.com/bid/106781
- https://access.redhat.com/errata/RHSA-2019:0218
- https://access.redhat.com/errata/RHSA-2019:0219
- https://access.redhat.com/errata/RHSA-2019:0269
- https://access.redhat.com/errata/RHSA-2019:0270
- https://lists.debian.org/debian-lts-announce/2019/01/msg00025.html
- https://lists.debian.org/debian-lts-announce/2019/02/msg00024.html
- https://security.gentoo.org/glsa/201903-04
- https://security.gentoo.org/glsa/201904-07
- https://usn.ubuntu.com/3874-1/
- https://usn.ubuntu.com/3897-1/
- https://www.debian.org/security/2019/dsa-4376
- https://www.debian.org/security/2019/dsa-4392
- https://www.mozilla.org/security/advisories/mfsa2019-01/
- https://www.mozilla.org/security/advisories/mfsa2019-02/
- https://www.mozilla.org/security/advisories/mfsa2019-03/
- http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00021.html
- http://www.securityfocus.com/bid/106781
- https://access.redhat.com/errata/RHSA-2019:0218
- https://access.redhat.com/errata/RHSA-2019:0219
- https://access.redhat.com/errata/RHSA-2019:0269
- https://access.redhat.com/errata/RHSA-2019:0270
- https://lists.debian.org/debian-lts-announce/2019/01/msg00025.html
- https://lists.debian.org/debian-lts-announce/2019/02/msg00024.html