Multiple vulnerabilities in Mozilla Thunderbird



Published: 2021-09-08
Risk High
Patch available YES
Number of vulnerabilities 3
CVE-ID CVE-2021-38492
CVE-2021-38495
CVE-2021-38493
CWE-ID CWE-20
CWE-119
Exploitation vector Network
Public exploit N/A
Vulnerable software
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Mozilla Thunderbird
Client/Desktop applications / Messaging software

Vendor Mozilla

Security Bulletin

This security bulletin contains information about 3 vulnerabilities.

1) Input validation error

EUVDB-ID: #VU56373

Risk: Medium

CVSSv3.1:

CVE-ID: CVE-2021-38492

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 insufficient validation of user-supplied input when delegating navigations to the operating system. Firefox accept the mk scheme, which allows a remote attacker to launch pages and execute scripts in Internet Explorer in unprivileged mode.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Mozilla Thunderbird: 91.0 - 91.0.3, 78.0 - 78.13.0, 68.0 - 68.12.1, 60.0 - 60.9.1


CPE2.3 External links

http://www.mozilla.org/en-US/security/advisories/mfsa2021-41/
http://www.mozilla.org/en-US/security/advisories/mfsa2021-42/

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

2) Buffer overflow

EUVDB-ID: #VU56376

Risk: High

CVSSv3.1:

CVE-ID: CVE-2021-38495

CWE-ID: CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer

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

Install update from vendor's website.

Vulnerable software versions

Mozilla Thunderbird: 91.0 - 91.0.3


CPE2.3 External links

http://www.mozilla.org/en-US/security/advisories/mfsa2021-41/

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

3) Buffer overflow

EUVDB-ID: #VU56374

Risk: High

CVSSv3.1:

CVE-ID: CVE-2021-38493

CWE-ID: CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer

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

Install updates from vendor's website.

Vulnerable software versions

Mozilla Thunderbird: 78.0 - 78.13.0, 68.0 - 68.12.1, 60.0 - 60.9.1


CPE2.3 External links

http://www.mozilla.org/en-US/security/advisories/mfsa2021-42/

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?



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