Amazon Linux 2 Security Advisory: ALAS2-2025-2896
Advisory Released Date: 2025-06-24
Advisory Updated Date: 2025-06-24
A crafted HTML email using mailbox:/// links can trigger automatic, unsolicited downloads of .pdf files to the user's desktop or home directory without prompting, even if auto-saving is disabled. This behavior can be abused to fill the disk with garbage data (e.g. using /dev/urandom on Linux) or to leak Windows credentials via SMB links when the email is viewed in HTML mode. While user interaction is required to download the .pdf file, visual obfuscation can conceal the download trigger. Viewing the email in HTML mode is enough to load external content. This vulnerability affects Thunderbird < 128.11.1 and Thunderbird < 139.0.2. (CVE-2025-5986)
Affected Packages:
thunderbird
Note:
This advisory is applicable to Amazon Linux 2 (AL2) Core repository. Visit this FAQ section for the difference between AL2 Core and AL2 Extras advisories.
Issue Correction:
Run yum update thunderbird to update your system.
aarch64:
thunderbird-128.11.1-1.amzn2.0.1.aarch64
thunderbird-debuginfo-128.11.1-1.amzn2.0.1.aarch64
src:
thunderbird-128.11.1-1.amzn2.0.1.src
x86_64:
thunderbird-128.11.1-1.amzn2.0.1.x86_64
thunderbird-debuginfo-128.11.1-1.amzn2.0.1.x86_64