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High ALAS2023-2025-996 9 CVEs

Important: firefox security update (Amazon Linux 2023)

Published Jun 4, 2025 · Updated Jun 10, 2025

Ecosystem: Amazon Linux

Summary

Package updates are available for Amazon Linux 2023 that fix the following vulnerabilities: CVE-2025-5269: Memory safety bug present in Firefox ESR 128.10, and Thunderbird 128.10. This bug showed evidence of memory corruption and we presume that with enough effort this could have been exploited to run arbitrary code. This vulnerability affects Firefox ESR < 128.11. CVE-2025-5268: Memory safety bugs present in Firefox 138, Thunderbird 138, Firefox ESR 128.10, and Thunderbird 128.10. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 139 and Firefox ESR < 128.11. CVE-2025-5267: A clickjacking vulnerability could have been used to trick a user into leaking saved payment card details to a malicious page. This vulnerability affects Firefox < 139 and Firefox ESR < 128.11. CVE-2025-5266: Script elements loading cross-origin resources generated load and error events which leaked information enabling XS-Leaks attacks. This vulnerability affects Firefox < 139 and Firefox ESR < 128.11. CVE-2025-5265: Due to insufficient escaping of the ampersand character in the "Copy as cURL" feature, an attacker could trick a user into using this command, potentially leading to local code execution on the user's system. *This bug only affects Firefox for Windows. Other versions of Firefox are unaffected.* This vulnerability affects Firefox < 139, Firefox ESR < 115.24, and Firefox ESR < 128.11. CVE-2025-5264: Due to insufficient escaping of the newline character in the "Copy as cURL" feature, an attacker could trick a user into using this command, potentially leading to local code execution on the user's system. This vulnerability affects Firefox < 139, Firefox ESR < 115.24, and Firefox ESR < 128.11. CVE-2025-5263: Error handling for script execution was incorrectly isolated from web content, which could have allowed cross-origin leak attacks. This vulnerability affects Firefox < 139, Firefox ESR < 115.24, and Firefox ESR < 128.11. CVE-2025-4919: An attacker was able to perform an out-of-bounds read or write on a JavaScript object by confusing array index sizes. This vulnerability affects Firefox < 138.0.4, Firefox ESR < 128.10.1, and Firefox ESR < 115.23.1. CVE-2025-4918: An attacker was able to perform an out-of-bounds read or write on a JavaScript `Promise` object. This vulnerability affects Firefox < 138.0.4, Firefox ESR < 128.10.1, and Firefox ESR < 115.23.1.

Fixed packages 3

ReleasePackageFixed in
Amazon Linux · 2023 firefox 0:128.11.0-1.amzn2023.0.2
Amazon Linux · 2023 firefox-debuginfo 0:128.11.0-1.amzn2023.0.2
Amazon Linux · 2023 firefox-debugsource 0:128.11.0-1.amzn2023.0.2

Vulnerabilities 9

  • Critical 9.8
    CVE-2025-4918

    Out-of-bounds access when resolving Promise objects

    An attacker was able to perform an out-of-bounds read or write on a JavaScript `Promise` object. This vulnerability was fixed in Firefox 138.0.4, Firefox ESR 128.10.1, Firefox ESR 115.23.1, Thunderbird 128.10.2, and Thunderbird 138.0.2.

    Mozilla Firefox Thunderbird thunderbird Browsers Debian Ubuntu Wolfi
  • High 8.8
    CVE-2025-4919

    Out-of-bounds access when optimizing linear sums

    An attacker was able to perform an out-of-bounds read or write on a JavaScript object by confusing array index sizes. This vulnerability was fixed in Firefox 138.0.4, Firefox ESR 128.10.1, Firefox ESR 115.23.1, Thunderbird 128.10.2, and Thunderbird 138.0.2.

    Mozilla Firefox Thunderbird thunderbird Browsers Debian Ubuntu Wolfi
  • High 8.1
    CVE-2025-5268

    Memory safety bugs fixed in Firefox 139, Thunderbird 139, Firefox ESR 128.11, and Thunderbird 128.11

    Memory safety bugs present in Firefox 138, Thunderbird 138, Firefox ESR 128.10, and Thunderbird 128.10. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary cod…

    Mozilla Firefox Thunderbird thunderbird Browsers Debian Ubuntu Wolfi
  • High 8.1
    CVE-2025-5269

    Memory safety bug fixed in Firefox ESR 128.11 and Thunderbird 128.11

    Memory safety bug present in Firefox ESR 128.10, and Thunderbird 128.10. This bug showed evidence of memory corruption and we presume that with enough effort this could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox ESR 128…

    Mozilla Firefox Thunderbird thunderbird Browsers Debian Ubuntu Wolfi
  • Medium 5.4
    CVE-2025-5267

    Clickjacking vulnerability could have led to leaking saved payment card details

    A clickjacking vulnerability could have been used to trick a user into leaking saved payment card details to a malicious page. This vulnerability was fixed in Firefox 139, Firefox ESR 128.11, Thunderbird 139, and Thunderbird 128.11.

    Mozilla Firefox Thunderbird thunderbird Browsers Debian Ubuntu Wolfi
  • Medium 4.8
    CVE-2025-5264

    Potential local code execution in “Copy as cURL” command

    Due to insufficient escaping of the newline character in the “Copy as cURL” feature, an attacker could trick a user into using this command, potentially leading to local code execution on the user's system. This vulnerability was fixed in Firefox 139, Firefox…

    Mozilla Firefox Thunderbird thunderbird Browsers Debian Ubuntu Wolfi
  • Medium 4.8
    CVE-2025-5265

    Potential local code execution in “Copy as cURL” command

    Due to insufficient escaping of the ampersand character in the “Copy as cURL” feature, an attacker could trick a user into using this command, potentially leading to local code execution on the user's system. *This bug only affects Firefox for Windows. Other …

    Mozilla Firefox Thunderbird thunderbird Browsers Ubuntu Wolfi
  • Medium 4.3
    CVE-2025-5263

    Error handling for script execution was incorrectly isolated from web content

    Error handling for script execution was incorrectly isolated from web content, which could have allowed cross-origin leak attacks. This vulnerability was fixed in Firefox 139, Firefox ESR 115.24, Firefox ESR 128.11, Thunderbird 139, and Thunderbird 128.11.

    Mozilla Firefox Thunderbird thunderbird Browsers Debian Ubuntu Wolfi
  • Medium 4.3
    CVE-2025-5266

    Script element events leaked cross-origin resource status

    Script elements loading cross-origin resources generated load and error events which leaked information enabling XS-Leaks attacks. This vulnerability was fixed in Firefox 139, Firefox ESR 128.11, Thunderbird 139, and Thunderbird 128.11.

    Mozilla Firefox Thunderbird thunderbird Browsers Debian Ubuntu Wolfi

References

  • web
    https://alas.aws.amazon.com/cve/html/CVE-2025-4918.html
  • web
    https://alas.aws.amazon.com/cve/html/CVE-2025-4919.html
  • web
    https://alas.aws.amazon.com/cve/html/CVE-2025-5263.html
  • web
    https://alas.aws.amazon.com/cve/html/CVE-2025-5264.html
  • web
    https://alas.aws.amazon.com/cve/html/CVE-2025-5265.html
  • web
    https://alas.aws.amazon.com/cve/html/CVE-2025-5266.html
  • web
    https://alas.aws.amazon.com/cve/html/CVE-2025-5267.html
  • web
    https://alas.aws.amazon.com/cve/html/CVE-2025-5268.html
  • web
    https://alas.aws.amazon.com/cve/html/CVE-2025-5269.html