Debian update for thunderbird

Published: 2021-02-01 | Updated: 2021-07-01

Risk	High
Patch available	YES
Number of vulnerabilities	7
CVE-ID	CVE-2020-15685 CVE-2020-16044 CVE-2020-26976 CVE-2021-23953 CVE-2021-23954 CVE-2021-23960 CVE-2021-23964
CWE-ID	CWE-94 CWE-416 CWE-399 CWE-200 CWE-843 CWE-119
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	thunderbird (Debian package) Operating systems & Components / Operating system package or component
Vendor	Debian

Security Bulletin

This security bulletin contains information about 7 vulnerabilities.

1) Code Injection

EUVDB-ID: #VU50038

Risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-15685

CWE-ID: CWE-94 - Improper Control of Generation of Code ('Code Injection')

Exploit availability: No

Description

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

The vulnerability exists due to improper input validation when processing plaintext phase of the IMAP STARTTLS connection setup. A remote attacker can pass protocol commands, which can be evaluated within the encrypted session.

Mitigation

Update thunderbird package to version 1:78.7.0-1~deb10u1.

Vulnerable software versions

thunderbird (Debian package): 1:60.8.0-1~deb10u1 - 78.6.0-1~deb10u1

CPE2.3

External links

http://www.debian.org/security/2021/dsa-4842

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: #VU49300

Risk: High

CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-16044

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 when processing COOKIE-ECHO chunk in a SCTP packet. A remote attacker can pass specially crafted data to the browser, trigger a use-after-free error and execute arbitrary code on the system.

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

Mitigation

Update thunderbird package to version 1:78.7.0-1~deb10u1.

Vulnerable software versions

thunderbird (Debian package): 1:60.8.0-1~deb10u1 - 78.6.0-1~deb10u1

CPE2.3

External links

http://www.debian.org/security/2021/dsa-4842

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) Resource management error

EUVDB-ID: #VU49018

Risk: Low

CVSSv3.1: 3.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-26976

CWE-ID: CWE-399 - Resource Management Errors

Exploit availability: No

Description

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

The vulnerability exists due to improper management of internal resources within the application, when processing embedded elements with https/http protocols. When a HTTPS pages was embedded in a HTTP page, and there was a service worker registered for the former, the service worker could have intercepted the request for the secure page despite the iframe not being a secure context due to the (insecure) framing.

Mitigation

Update thunderbird package to version 1:78.7.0-1~deb10u1.

Vulnerable software versions

thunderbird (Debian package): 1:60.8.0-1~deb10u1 - 78.6.0-1~deb10u1

CPE2.3

External links

http://www.debian.org/security/2021/dsa-4842

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: #VU50021

Risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-23953

CWE-ID: CWE-200 - Information exposure

Exploit availability: No

Description

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

The vulnerability exists due to cross-origin information leak when processing PDF files. A remote attacker can create a specially crafted PDF file, trick the victim into opening it and gain access to sensitive information via redirected PDF requests, when said information is served as chunked data.

Mitigation

Update thunderbird package to version 1:78.7.0-1~deb10u1.

Vulnerable software versions

thunderbird (Debian package): 1:60.8.0-1~deb10u1 - 78.6.0-1~deb10u1

CPE2.3

External links

http://www.debian.org/security/2021/dsa-4842

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) Type Confusion

EUVDB-ID: #VU50022

Risk: High

CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-23954

CWE-ID: CWE-843 - Type confusion

Exploit availability: No

Description

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

The vulnerability exists due to a type confusion error when using the new logical assignment operators in a JavaScript switch statement. A remote attacker can create a specially crafted web page, trick the victim into opening it, trigger a type confusion error and execute arbitrary code on the target system.

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

Mitigation

Update thunderbird package to version 1:78.7.0-1~deb10u1.

Vulnerable software versions

thunderbird (Debian package): 1:60.8.0-1~deb10u1 - 78.6.0-1~deb10u1

CPE2.3

External links

http://www.debian.org/security/2021/dsa-4842

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) Buffer overflow

EUVDB-ID: #VU50024

Risk: High

CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-23960

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

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

The vulnerability exists due to insufficient validation of user-supplied input when performing garbage collection on re-declared JavaScript variables. A remote attacker can create a specially crafted web page, trick the victim into opening it and execute arbitrary code on the system.

Mitigation

Update thunderbird package to version 1:78.7.0-1~deb10u1.

Vulnerable software versions

thunderbird (Debian package): 1:60.8.0-1~deb10u1 - 78.6.0-1~deb10u1

CPE2.3

External links

http://www.debian.org/security/2021/dsa-4842

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: #VU50025

Risk: High

CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-23964

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 thunderbird package to version 1:78.7.0-1~deb10u1.

Vulnerable software versions

thunderbird (Debian package): 1:60.8.0-1~deb10u1 - 78.6.0-1~deb10u1

CPE2.3

External links

http://www.debian.org/security/2021/dsa-4842

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.