SB2025050138 - Debian update for thunderbird
Published: May 1, 2025
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 7 secuirty vulnerabilities.
1) Information disclosure (CVE-ID: CVE-2025-2830)
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to an error when handling attachment in a multipart
message. A remote attacker can trick the victim into forwarding a specially crafted email and force Thunderbird to include in the message a
directory listing of /tmp.
2) Information disclosure (CVE-ID: CVE-2025-3522)
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to a missing URL validation when processing the X-Mozilla-External-Attachment-URL header to handle externally hosted attachments. A remote attacker can send a specially crafted email to the victim that contains a link with an internally referenced document, such as "chrome://" or "chrome://" and force Thunderbird to share hashed Windows credentials with that URL, leading to information disclosure.
3) Spoofing attack (CVE-ID: CVE-2025-3523)
The vulnerability allows a remote attacker to perform spoofing attack.
When an email contains multiple attachments with external links via the X-Mozilla-External-Attachment-URL header, only the last link is shown when hovering over any attachment. Although the correct link is used on click, the misleading hover text could trick users into downloading content from untrusted sources.
4) Protection Mechanism Failure (CVE-ID: CVE-2025-4083)
The vulnerability allows a remote attacker to bypass implemented security restrictions.
The vulnerability exists due to insufficient process isolation when handling "javascript:" URI links. An attacker can trick the victim into clicking on a specially crafted link and execute content in the top-level document's process instead of the intended frame.
5) Out-of-bounds read (CVE-ID: CVE-2025-4087)
The vulnerability allows a remote attacker to compromise the affected system.
The vulnerability exists due to a boundary condition when parsing XPath content. A remote attacker can trick the victim into visiting a specially crafted website, trigger an out-of-bounds read error and execute arbitrary code on the system.
6) Buffer overflow (CVE-ID: CVE-2025-4091)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error when processing HTML content. A remote attacker can create a specially crafted website, trick the victim into opening it, trigger memory corruption and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
7) Buffer overflow (CVE-ID: CVE-2025-4093)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error when processing HTML content. A remote attacker can create a specially crafted website, trick the victim into opening it, trigger memory corruption and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Remediation
Install update from vendor's website.