Advisory Published

USN-6515-1: Thunderbird vulnerabilities

First published: Mon Nov 27 2023(Updated: )

Multiple security issues were discovered in Thunderbird. If a user were tricked into opening a specially crafted website in a browsing context, an attacker could potentially exploit these to cause a denial of service, obtain sensitive information, bypass security restrictions, cross-site tracing, or execute arbitrary code. (CVE-2023-6206, CVE-2023-6212) It was discovered that Thudnerbird did not properly manage memory when images were created on the canvas element. An attacker could potentially exploit this issue to obtain sensitive information. (CVE-2023-6204) It discovered that Thunderbird incorrectly handled certain memory when using a MessagePort. An attacker could potentially exploit this issue to cause a denial of service. (CVE-2023-6205) It discovered that Thunderbird incorrectly did not properly manage ownership in ReadableByteStreams. An attacker could potentially exploit this issue to cause a denial of service. (CVE-2023-6207) It discovered that Thudnerbird incorrectly did not properly manage copy operations when using Selection API in X11. An attacker could potentially exploit this issue to obtain sensitive information. (CVE-2023-6208) Rachmat Abdul Rokhim discovered that Thunderbird incorrectly handled parsing of relative URLS starting with "///". An attacker could potentially exploit this issue to cause a denial of service. (CVE-2023-6209)

Affected SoftwareAffected VersionHow to fix
All of
ubuntu/thunderbird<1:115.5.0+build1-0ubuntu0.23.10.1
1:115.5.0+build1-0ubuntu0.23.10.1
Ubuntu Ubuntu=23.10
All of
ubuntu/thunderbird<1:115.5.0+build1-0ubuntu0.23.04.1
1:115.5.0+build1-0ubuntu0.23.04.1
Ubuntu Ubuntu=23.04
All of
ubuntu/thunderbird<1:115.5.0+build1-0ubuntu0.22.04.1
1:115.5.0+build1-0ubuntu0.22.04.1
Ubuntu Ubuntu=22.04
All of
ubuntu/thunderbird<1:115.5.0+build1-0ubuntu0.20.04.1
1:115.5.0+build1-0ubuntu0.20.04.1
Ubuntu Ubuntu=20.04

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Reference Links

Child vulnerabilities

(Contains the following vulnerabilities)

Frequently Asked Questions

  • What is the severity of USN-6515-1?

    The severity of USN-6515-1 is not specified.

  • How do I fix USN-6515-1?

    To fix USN-6515-1, update Thunderbird to version 1:115.5.0+build1-0ubuntu0.23.10.1 or later.

  • Which versions of Thunderbird are affected by USN-6515-1?

    The versions of Thunderbird affected by USN-6515-1 are 1:115.5.0+build1-0ubuntu0.23.10.1, 1:115.5.0+build1-0ubuntu0.23.04.1, 1:115.5.0+build1-0ubuntu0.22.04.1, and 1:115.5.0+build1-0ubuntu0.20.04.1.

  • What are the security issues addressed by USN-6515-1?

    The security issues addressed by USN-6515-1 include denial of service, sensitive information disclosure, security restriction bypass, and cross-site tracing vulnerabilities.

  • Where can I find more information about USN-6515-1?

    You can find more information about USN-6515-1 at the following references: [1](https://ubuntu.com/security/CVE-2023-6206), [2](https://ubuntu.com/security/CVE-2023-6212), [3](https://ubuntu.com/security/CVE-2023-6204).

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