Anolis OS update for thunderbird



Risk High
Patch available YES
Number of vulnerabilities 5
CVE-ID CVE-2025-5986
CVE-2025-6424
CVE-2025-6425
CVE-2025-6429
CVE-2025-6430
CWE-ID CWE-20
CWE-416
CWE-200
CWE-693
Exploitation vector Network
Public exploit N/A
Vulnerable software
 Anolis OS
Operating systems & Components / Operating system

thunderbird
Operating systems & Components / Operating system package or component

Vendor OpenAnolis

Security Bulletin

This security bulletin contains information about 5 vulnerabilities.

1) Input validation error

EUVDB-ID: #VU111055

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-2025-5986

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to sensitive information or perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input when handling mailbox:/// links. A remote attacker can create a specially crafted email mailbox:/// links and trigger unsolicited downloads of .pdf files to the user's desktop or home directory without prompting, even if auto-saving is disabled. Additionally, this behavior can be use to leak Windows credentials via SMB links when the email is viewed in HTML mode.

Note, viewing the email in HTML mode is enough to load external content.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

Anolis OS: 8

thunderbird: before 128.12.0-1.0.1

CPE2.3 External links

https://anas.openanolis.cn/errata/detail/ANSA-2025:0403


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) Use-after-free

EUVDB-ID: #VU111885

Risk: High

CVSSv4.0: 5.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2025-6424

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error in FontFaceSet. A remote attacker can trick the victim into opening a specially crafted website and execute arbitrary code on the system.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

Anolis OS: 8

thunderbird: before 128.12.0-1.0.1

CPE2.3 External links

https://anas.openanolis.cn/errata/detail/ANSA-2025:0403


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

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

3) Information disclosure

EUVDB-ID: #VU111886

Risk: Medium

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

CVE-ID: CVE-2025-6425

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 the WebCompat extension shipped with Firefox allows to enumerate resources and obtain a persistent UUID that identifies the browser, and persists between containers and normal/private browsing mode, but not profiles.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

Anolis OS: 8

thunderbird: before 128.12.0-1.0.1

CPE2.3 External links

https://anas.openanolis.cn/errata/detail/ANSA-2025:0403


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) Input validation error

EUVDB-ID: #VU111888

Risk: Low

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

CVE-ID: CVE-2025-6429

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 parsing of embedded URLs that led to URLs being rewritten to the youtube.com domain. A remote attacker can use a specially crafted embed tag to bypass website security checks that restricted which domains users were allowed to embed.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

Anolis OS: 8

thunderbird: before 128.12.0-1.0.1

CPE2.3 External links

https://anas.openanolis.cn/errata/detail/ANSA-2025:0403


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.

5) Protection Mechanism Failure

EUVDB-ID: #VU111889

Risk: Medium

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

CVE-ID: CVE-2025-6430

CWE-ID: CWE-693 - Protection Mechanism Failure

Exploit availability: No

Description

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

The vulnerability exists due to an error when handling embed or object tags. When a file download is specified via the Content-Disposition header, that directive would be ignored if the file was included via a <embed> or <object> tag, potentially making a website vulnerable to a cross-site scripting attack.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

Anolis OS: 8

thunderbird: before 128.12.0-1.0.1

CPE2.3 External links

https://anas.openanolis.cn/errata/detail/ANSA-2025:0403


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.



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