Slackware Linux update for mozilla-thunderbird



Risk High
Patch available YES
Number of vulnerabilities 4
CVE-ID CVE-2025-3875
CVE-2025-3877
CVE-2025-3909
CVE-2025-3932
CWE-ID CWE-20
CWE-200
Exploitation vector Network
Public exploit N/A
Vulnerable software
 Slackware Linux
Operating systems & Components / Operating system

mozilla-thunderbird
Operating systems & Components / Operating system package or component

Vendor Slackware

Security Bulletin

This security bulletin contains information about 4 vulnerabilities.

1) Input validation error

EUVDB-ID: #VU109190

Risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2025-3875

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a spoofing attack

The vulnerability exists due to insufficient validation of email addresses. A remote attacker can spoof the sender email address via a specially crafted "From" field in the email..

Mitigation

Update the affected package mozilla-thunderbird.

Vulnerable software versions

Slackware Linux: 15.0

mozilla-thunderbird: before 128.10.1esr

CPE2.3 External links

https://www.slackware.com/security/viewer.php?l=slackware-security&y=2025&m=slackware-security.383987


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Input validation error

EUVDB-ID: #VU109191

Risk: Medium

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2025-3877

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass implemented security restrictions.

The vulnerability exists due to incorrect handling of "mailbox:///" links. A remote attacker can trick the victim into clicking on such a link and force the application into downloading arbitrary file or leak credentials.

Mitigation

Update the affected package mozilla-thunderbird.

Vulnerable software versions

Slackware Linux: 15.0

mozilla-thunderbird: before 128.10.1esr

CPE2.3 External links

https://www.slackware.com/security/viewer.php?l=slackware-security&y=2025&m=slackware-security.383987


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

3) Input validation error

EUVDB-ID: #VU109192

Risk: High

CVSSv4.0: 6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2025-3909

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary JavaScript code.

The vulnerability exists due to incorrect handling of the X-Mozilla-External-Attachment-URL header. A remote attacker can create a nested email attachment, set its content type to application/pdf and force the application to execute arbitrary JavaScript code in the file:/// context.

Mitigation

Update the affected package mozilla-thunderbird.

Vulnerable software versions

Slackware Linux: 15.0

mozilla-thunderbird: before 128.10.1esr

CPE2.3 External links

https://www.slackware.com/security/viewer.php?l=slackware-security&y=2025&m=slackware-security.383987


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

4) Information disclosure

EUVDB-ID: #VU109193

Risk: Low

CVSSv4.0: 0.5 [CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2025-3932

CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to incorrect handling of tracking links. A remote attacker can create a specially crafted email message that showed a tracking link as an attachment. If the user attempted to open the attachment, Thunderbird automatically accessed the link.

Mitigation

Update the affected package mozilla-thunderbird.

Vulnerable software versions

Slackware Linux: 15.0

mozilla-thunderbird: before 128.10.1esr

CPE2.3 External links

https://www.slackware.com/security/viewer.php?l=slackware-security&y=2025&m=slackware-security.383987


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



###SIDEBAR###