Ubuntu update for thunderbird

1) Buffer Underwrite ('Buffer Underflow')

EUVDB-ID: #VU84559

Risk: Low

CVSSv4.0: 0.4 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2023-6857

CWE-ID: CWE-124 - Buffer Underwrite ('Buffer Underflow')

Exploit availability: No

Description

The vulnerability allows a local user to gain access to sensitive information.

The vulnerability exists due to an error when handling symbolic links. A local user can trigger a race when the browser resolves a symbolic link, where the buffer passed to readlink may actually be smaller than necessary. A local user can gain access to potentially sensitive information.

The vulnerability affects Unix based operating systems only (e.g. Android, Linux, MacOS).

Mitigation

Update the affected package thunderbird to the latest version.

Vulnerable software versions

Ubuntu: 20.04 - 23.10

thunderbird (Ubuntu package): before 1:115.6.0+build2-0ubuntu0.20.04.1

CPE2.3

External links

https://ubuntu.com/security/notices/USN-6563-1

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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

2) Heap-based buffer overflow

EUVDB-ID: #VU84560

Risk: Low

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

CVE-ID: CVE-2023-6858

CWE-ID: CWE-122 - Heap-based Buffer Overflow

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary error in nsTextFragment when handling out-of-memory situations. A remote attacker can trick the victim to visit a specially crafted website, trigger a heap overflow and crash the browser.

Mitigation

Update the affected package thunderbird to the latest version.

Vulnerable software versions

Ubuntu: 20.04 - 23.10

thunderbird (Ubuntu package): before 1:115.6.0+build2-0ubuntu0.20.04.1

CPE2.3

cpe:2.3:o:canonical:thunderbird_ubuntu_package:*:*:*:*:*:ubuntu:*:*

External links

https://ubuntu.com/security/notices/USN-6563-1

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) Use-after-free

EUVDB-ID: #VU84561

Risk: Low

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

CVE-ID: CVE-2023-6859

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a use-after-free error in PR_GetIdentitiesLayer when creating the TLS socket. A remote attacker can trick the victim to visit a specially crafted website and crash the browser.

Mitigation

Update the affected package thunderbird to the latest version.

Vulnerable software versions

Ubuntu: 20.04 - 23.10

thunderbird (Ubuntu package): before 1:115.6.0+build2-0ubuntu0.20.04.1

CPE2.3

cpe:2.3:o:canonical:thunderbird_ubuntu_package:*:*:*:*:*:ubuntu:*:*

External links

https://ubuntu.com/security/notices/USN-6563-1

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) Heap-based buffer overflow

EUVDB-ID: #VU84564

Risk: Medium

CVSSv4.0: 4.8 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-6861

CWE-ID: CWE-122 - Heap-based Buffer Overflow

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error within the nsWindow::PickerOpen(void) method when the browser is running in headless mode. A remote attacker can trick the victim to visit a specially crafted website, trigger a heap-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Update the affected package thunderbird to the latest version.

Vulnerable software versions

Ubuntu: 20.04 - 23.10

thunderbird (Ubuntu package): before 1:115.6.0+build2-0ubuntu0.20.04.1

CPE2.3

cpe:2.3:o:canonical:thunderbird_ubuntu_package:*:*:*:*:*:ubuntu:*:*

External links

https://ubuntu.com/security/notices/USN-6563-1

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) Use-after-free

EUVDB-ID: #VU84565

Risk: Low

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

CVE-ID: CVE-2023-6862

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a remote attacker to crash the browser.

The vulnerability exists due to a use-after-free error in nsDNSService::Init during browser startup. A remote attacker with control over the DNS server can cause the browser to crash.

Mitigation

Update the affected package thunderbird to the latest version.

Vulnerable software versions

Ubuntu: 20.04 - 23.10

thunderbird (Ubuntu package): before 1:115.6.0+build2-0ubuntu0.20.04.1

CPE2.3

cpe:2.3:o:canonical:thunderbird_ubuntu_package:*:*:*:*:*:ubuntu:*:*

External links

https://ubuntu.com/security/notices/USN-6563-1

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.

6) Reliance on undefined behavior

EUVDB-ID: #VU84566

Risk: Low

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

CVE-ID: CVE-2023-6863

CWE-ID: CWE-758 - Reliance on Undefined, Unspecified, or Implementation-Defined Behavior

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service attack.

The vulnerability exists due to reliance on undefined behavior in ShutdownObserver(). A remote attacker can crash the browser.

Mitigation

Update the affected package thunderbird to the latest version.

Vulnerable software versions

Ubuntu: 20.04 - 23.10

thunderbird (Ubuntu package): before 1:115.6.0+build2-0ubuntu0.20.04.1

CPE2.3

cpe:2.3:o:canonical:thunderbird_ubuntu_package:*:*:*:*:*:ubuntu:*:*

External links

https://ubuntu.com/security/notices/USN-6563-1

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.

7) Buffer overflow

EUVDB-ID: #VU84567

Risk: High

CVSSv4.0: 6.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2023-6864

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

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.

Mitigation

Update the affected package thunderbird to the latest version.

Vulnerable software versions

Ubuntu: 20.04 - 23.10

thunderbird (Ubuntu package): before 1:115.6.0+build2-0ubuntu0.20.04.1

CPE2.3

cpe:2.3:o:canonical:thunderbird_ubuntu_package:*:*:*:*:*:ubuntu:*:*

External links

https://ubuntu.com/security/notices/USN-6563-1

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.

8) Spoofing attack

EUVDB-ID: #VU84576

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-2023-50762

CWE-ID: CWE-451 - User Interface (UI) Misrepresentation of Critical Information (Clickjacking, spoofing)

Exploit availability: No

Description

The vulnerability allows a remote attacker to spoof email content.

The vulnerability exists due to incorrect processing of user-supplied data. When processing a PGP/MIME payload that contains digitally signed text, the first paragraph of the text was never shown to the user. This is because the text was interpreted as a MIME message and the first paragraph was always treated as an email header section. A digitally signed text from a different context, such as a signed GIT commit, could be used to spoof an email message.

Mitigation

Update the affected package thunderbird to the latest version.

Vulnerable software versions

Ubuntu: 20.04 - 23.10

thunderbird (Ubuntu package): before 1:115.6.0+build2-0ubuntu0.20.04.1

CPE2.3

cpe:2.3:o:canonical:thunderbird_ubuntu_package:*:*:*:*:*:ubuntu:*:*

External links

https://ubuntu.com/security/notices/USN-6563-1

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.

9) Spoofing attack

EUVDB-ID: #VU84577

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-2023-50761

CWE-ID: CWE-451 - User Interface (UI) Misrepresentation of Critical Information (Clickjacking, spoofing)

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform spoofing attack.

The vulnerability exists due to incorrect processing of user-supplied data. The signature of a digitally signed S/MIME email message may optionally specify the signature creation date and time. If present, Thunderbird did not compare the signature creation date with the message date and time, and displayed a valid signature despite a date or time mismatch. This could be used to give recipients the impression that a message was sent at a different date or time.

Mitigation

Update the affected package thunderbird to the latest version.

Vulnerable software versions

Ubuntu: 20.04 - 23.10

thunderbird (Ubuntu package): before 1:115.6.0+build2-0ubuntu0.20.04.1

CPE2.3

cpe:2.3:o:canonical:thunderbird_ubuntu_package:*:*:*:*:*:ubuntu:*:*

External links

https://ubuntu.com/security/notices/USN-6563-1

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.

10) Heap-based buffer overflow

EUVDB-ID: #VU84557

Risk: High

CVSSv4.0: 6.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2023-6856

CWE-ID: CWE-122 - Heap-based Buffer Overflow

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error within the WebGL DrawElementsInstanced method when used on systems with the Mesa VM driver. A remote attacker can trick the victim to visit a specially crafted website, trigger a heap-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Update the affected package thunderbird to the latest version.

Vulnerable software versions

Ubuntu: 20.04 - 23.10

thunderbird (Ubuntu package): before 1:115.6.0+build2-0ubuntu0.20.04.1

CPE2.3

cpe:2.3:o:canonical:thunderbird_ubuntu_package:*:*:*:*:*:ubuntu:*:*

External links

https://ubuntu.com/security/notices/USN-6563-1

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.

11) Security features bypass

EUVDB-ID: #VU84562

Risk: Medium

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

CVE-ID: CVE-2023-6860

CWE-ID: CWE-254 - Security Features

Exploit availability: No

Description

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

The vulnerability exists due to VideoBridge lack of texture validation. A remote attacker can trick the victim to open a specially crafted website, escape the sandbox and gain access to sensitive information.

Mitigation

Update the affected package thunderbird to the latest version.

Vulnerable software versions

Ubuntu: 20.04 - 23.10

thunderbird (Ubuntu package): before 1:115.6.0+build2-0ubuntu0.20.04.1

CPE2.3

cpe:2.3:o:canonical:thunderbird_ubuntu_package:*:*:*:*:*:ubuntu:*:*

External links

https://ubuntu.com/security/notices/USN-6563-1

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.

Risk	High
Patch available	YES
Number of vulnerabilities	11
CVE-ID	CVE-2023-6857 CVE-2023-6858 CVE-2023-6859 CVE-2023-6861 CVE-2023-6862 CVE-2023-6863 CVE-2023-6864 CVE-2023-50762 CVE-2023-50761 CVE-2023-6856 CVE-2023-6860
CWE-ID	CWE-124 CWE-122 CWE-416 CWE-758 CWE-119 CWE-451 CWE-254
Exploitation vector	Network
Public exploit	N/A
Vulnerable software	Ubuntu Operating systems & Components / Operating system thunderbird (Ubuntu package) Operating systems & Components / Operating system package or component
Vendor	Canonical Ltd.