CVE-2023-6865
First published: Tue Dec 19 2023(Updated: )
`EncryptingOutputStream` was susceptible to exposing uninitialized data. This issue could only be abused in order to write data to a local disk which may have implications for private browsing mode. External Reference: <a href="https://www.mozilla.org/en-US/security/advisories/mfsa2023-54/#CVE-2023-6865">https://www.mozilla.org/en-US/security/advisories/mfsa2023-54/#CVE-2023-6865</a>
Credit: security@mozilla.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/firefox | <115.6 | 115.6 |
| redhat/thunderbird | <115.6 | 115.6 |
| debian/firefox | 135.0.1-1 | |
| debian/firefox-esr | 115.14.0esr-1~deb11u1 128.7.0esr-1~deb11u1 128.5.0esr-1~deb12u1 128.7.0esr-1~deb12u1 128.7.0esr-1 | |
| Firefox | <121.0 | |
| Firefox ESR | <115.6 | |
| Debian | =10.0 | |
| Debian | =11.0 | |
| Debian | =12.0 | |
| Firefox | <121 | 121 |
| Firefox ESR | <115.6 | 115.6 |
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Reference Links
- https://bugzilla.mozilla.org/show_bug.cgi?id=1864123
- https://www.mozilla.org/security/advisories/mfsa2023-54/
- https://www.mozilla.org/security/advisories/mfsa2023-56/
- https://www.debian.org/security/2023/dsa-5581
- https://lists.debian.org/debian-lts-announce/2023/12/msg00020.html
- https://security.gentoo.org/glsa/202401-10
- https://launchpad.net/bugs/cve/CVE-2023-6865
- https://www.mozilla.org/en-US/security/advisories/mfsa2023-54/#CVE-2023-6865
- https://access.redhat.com/errata/RHSA-2024:0012
- https://access.redhat.com/errata/RHSA-2024:0011
- https://access.redhat.com/errata/RHSA-2024:0019
- https://access.redhat.com/errata/RHSA-2024:0025
- https://access.redhat.com/errata/RHSA-2024:0021
- https://access.redhat.com/errata/RHSA-2024:0024
- https://access.redhat.com/errata/RHSA-2024:0022
- https://access.redhat.com/errata/RHSA-2024:0023
- https://access.redhat.com/errata/RHSA-2024:0026
- https://bugzilla.redhat.com/show_bug.cgi?id=2255361
- https://www.mozilla.org/en-US/security/advisories/mfsa2023-54/
- https://www.mozilla.org/en-US/security/advisories/mfsa2023-56/
- https://www.mozilla.org/en-US/security/advisories/mfsa2023-56/#CVE-2023-6865
- https://security-tracker.debian.org/tracker/CVE-2023-6865
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-6865
- https://nvd.nist.gov/vuln/detail/CVE-2023-6865
- https://ubuntu.com/security/CVE-2023-6865
Peer vulnerabilities
(Found alongside the following vulnerabilities)
Frequently Asked Questions
What is the severity of CVE-2023-6865?
CVE-2023-6865 is considered a medium severity vulnerability due to potential data exposure in private browsing mode.
How do I fix CVE-2023-6865?
To fix CVE-2023-6865, update to Firefox version 121, or ensure you are using Firefox ESR version 115.14 or newer.
Which versions of Firefox are affected by CVE-2023-6865?
CVE-2023-6865 affects Firefox versions prior to 121 and Firefox ESR versions prior to 115.14.
Is CVE-2023-6865 present in Thunderbird?
Yes, CVE-2023-6865 affects Thunderbird versions up to 115.6.
Can CVE-2023-6865 be exploited remotely?
CVE-2023-6865 cannot be exploited remotely as it requires local write access.
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