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High 1 exploited CVE USN-6368-1 6 CVEs

thunderbird vulnerabilities

Published Sep 14, 2023 · Updated Apr 22, 2026

Summary

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-2023-4573, CVE-2023-4574,
CVE-2023-4575, CVE-2023-4581, CVE-2023-4584)

It was discovered that Thunderbird did not properly manage memory when
handling WebP images. If a user were tricked into opening a malicious WebP
image file, an attacker could potentially exploit these to cause a denial
of service or execute arbitrary code. (CVE-2023-4863)

Fixed packages 2

ReleasePackageFixed in
Ubuntu · 20.04 LTS 20.04:LTS thunderbird 1:102.15.1+build1-0ubuntu0.20.04.1
Ubuntu · 22.04 LTS 22.04:LTS thunderbird 1:102.15.1+build1-0ubuntu0.22.04.1

Vulnerabilities 6

  • High 8.8
    CVE-2023-4863 Exploited Public exploit EPSS 100%

    libwebp: OOB write in BuildHuffmanTable

    Heap buffer overflow in libwebp in Google Chrome prior to 116.0.5845.187 and libwebp 1.3.2 allowed a remote attacker to perform an out of bounds memory write via a crafted HTML page. (Chromium security severity: Critical)

    KEV Sep 13, 2023
  • Unscored —

    Memory corruption in IPC CanvasTranslator

    When receiving rendering data over IPC `mStream` could have been destroyed when initialized, which could have led to a use-after-free causing a potentially exploitable crash. This vulnerability affects Firefox < 117, Firefox ESR < 102.15, Firefox ESR < 115.2,…

  • Unscored —

    Memory corruption in IPC ColorPickerShownCallback

    When creating a callback over IPC for showing the Color Picker window, multiple of the same callbacks could have been created at a time and eventually all simultaneously destroyed as soon as one of the callbacks finished. This could have led to a use-after-fr…

  • Unscored —

    Memory corruption in IPC FilePickerShownCallback

    When creating a callback over IPC for showing the File Picker window, multiple of the same callbacks could have been created at a time and eventually all simultaneously destroyed as soon as one of the callbacks finished. This could have led to a use-after-fre…

  • Unscored —

    XLL file extensions were downloadable without warnings

    Excel `.xll` add-in files did not have a blocklist entry in Firefox's executable blocklist which allowed them to be downloaded without any warning of their potential harm. This vulnerability affects Firefox < 117, Firefox ESR < 102.15, Firefox ESR < 115.2, Th…

  • Unscored —

    Memory safety bugs fixed in Firefox 117, Firefox ESR 102.15, Firefox ESR 115.2, Thunderbird 102.15, and Thunderbird 115.2

    Memory safety bugs present in Firefox 116, Firefox ESR 102.14, Firefox ESR 115.1, Thunderbird 102.14, and Thunderbird 115.1. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited…

References

  • report
    https://ubuntu.com/security/CVE-2023-4573
  • report
    https://ubuntu.com/security/CVE-2023-4574
  • report
    https://ubuntu.com/security/CVE-2023-4575
  • report
    https://ubuntu.com/security/CVE-2023-4581
  • report
    https://ubuntu.com/security/CVE-2023-4584
  • report
    https://ubuntu.com/security/CVE-2023-4863