Debian update for thunderbird



Risk High
Patch available YES
Number of vulnerabilities 5
CVE-ID CVE-2020-12410
CVE-2020-12406
CVE-2020-12405
CVE-2020-12399
CVE-2020-12398
CWE-ID CWE-119
CWE-843
CWE-416
CWE-362
CWE-319
Exploitation vector Network
Public exploit Public exploit code for vulnerability #1 is available.
Public exploit code for vulnerability #2 is available.
Public exploit code for vulnerability #3 is available.
Public exploit code for vulnerability #4 is available.
Public exploit code for vulnerability #5 is available.
Vulnerable software
 thunderbird (Debian package)
Operating systems & Components / Operating system package or component

Vendor Debian

Security Bulletin

This security bulletin contains information about 5 vulnerabilities.

1) Buffer overflow

EUVDB-ID: #VU28527

Risk: High

CVSSv4.0: 7.3 [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:P/U:Amber]

CVE-ID: CVE-2020-12410

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 web page, 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 one of the following versions: 1:68.9.0-1~deb9u1, 1:68.9.0-1~deb10u1.

Vulnerable software versions

thunderbird (Debian package): 1:60.0~b2-1 - 1:68.8.1-1

CPE2.3 External links

https://www.debian.org/security/2020/dsa-4702


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. However, proof of concept for this vulnerability is available.

2) Type Confusion

EUVDB-ID: #VU28524

Risk: High

CVSSv4.0: 7.3 [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:P/U:Amber]

CVE-ID: CVE-2020-12406

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 during unboxed JavaScript objects removal. 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 one of the following versions: 1:68.9.0-1~deb9u1, 1:68.9.0-1~deb10u1.

Vulnerable software versions

thunderbird (Debian package): 1:60.0~b2-1 - 1:68.8.1-1

CPE2.3 External links

https://www.debian.org/security/2020/dsa-4702


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. However, proof of concept for this vulnerability is available.

3) Use-after-free

EUVDB-ID: #VU28523

Risk: High

CVSSv4.0: 7.3 [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:P/U:Amber]

CVE-ID: CVE-2020-12405

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 in SharedWorkerService due to a race condition. A remote attacker can create a specially crafted web page, trick the victim into opening it, trigger a use-after-free error and execute arbitrary code on the target system.

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

Mitigation

Update thunderbird package to one of the following versions: 1:68.9.0-1~deb9u1, 1:68.9.0-1~deb10u1.

Vulnerable software versions

thunderbird (Debian package): 1:60.0~b2-1 - 1:68.8.1-1

CPE2.3 External links

https://www.debian.org/security/2020/dsa-4702


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. However, proof of concept for this vulnerability is available.

4) Race condition

EUVDB-ID: #VU28522

Risk: Medium

CVSSv4.0: 6.9 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/U:Green]

CVE-ID: CVE-2020-12399

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Exploit availability: No

Description

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

The vulnerability exists due to time differences in Mozilla NSS library during the process of generating a DSA signature, the nonce value 'k' is not padded, exposing the bit length. Combined with other techniques, this can result in the recovery of the DSA private key.

Mitigation

Update thunderbird package to one of the following versions: 1:68.9.0-1~deb9u1, 1:68.9.0-1~deb10u1.

Vulnerable software versions

thunderbird (Debian package): 1:60.0~b2-1 - 1:68.8.1-1

CPE2.3 External links

https://www.debian.org/security/2020/dsa-4702


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. However, proof of concept for this vulnerability is available.

5) Cleartext transmission of sensitive information

EUVDB-ID: #VU28569

Risk: Medium

CVSSv4.0: 5.5 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/U:Green]

CVE-ID: CVE-2020-12398

CWE-ID: CWE-319 - Cleartext Transmission of Sensitive Information

Exploit availability: No

Description

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

The vulnerability exists in STARTTLS implementation for an IMAP, when the server sends  a PREAUTH response. In this case Thunderbird will continue with an unencrypted connection, causing email data to be sent without protection.

Mitigation

Update thunderbird package to one of the following versions: 1:68.9.0-1~deb9u1, 1:68.9.0-1~deb10u1.

Vulnerable software versions

thunderbird (Debian package): 1:60.0~b2-1 - 1:68.8.1-1

CPE2.3 External links

https://www.debian.org/security/2020/dsa-4702


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. However, proof of concept for this vulnerability is available.



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