Multiple vulnerabilities in Mozilla Thunderbird



Published: 2021-12-21
Risk Medium
Patch available YES
Number of vulnerabilities 2
CVE-ID CVE-2021-44538
CVE-2021-4126
CWE-ID CWE-119
CWE-357
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 2 vulnerabilities.

1) Buffer overflow

EUVDB-ID: #VU59080

Risk: Medium

CVSSv3.1:

CVE-ID: CVE-2021-44538

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

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

The vulnerability exists due to a boundary error within the olm_session_describe() function in libolm. A remote attacker send specially crafted messages to the application that is using the affected library, trigger buffer overflow and perform a denial of service (DoS) attack

Mitigation

Install update from vendor's website.

Vulnerable software versions

Mozilla Thunderbird: 91.0 - 91.4.0


CPE2.3 External links

http://www.mozilla.org/en-US/security/advisories/mfsa2021-55/

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

2) Insufficient UI Warning of Dangerous Operations

EUVDB-ID: #VU59081

Risk: Low

CVSSv3.1:

CVE-ID: CVE-2021-4126

CWE-ID: CWE-357 - Insufficient UI Warning of Dangerous Operations

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform spoofing attacks.

The vulnerability exists in the way Thunderbird handles signed email messages. When receiving an OpenPGP/MIME signed email message that contains an additional outer MIME message layer, for example a message footer added by a mailing list gateway, Thunderbird only considered the inner signed message for the signature validity. This gave the false impression that the additional contents were also covered by the digital signature.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Mozilla Thunderbird: 91.0 - 91.4.0


CPE2.3 External links

http://www.mozilla.org/en-US/security/advisories/mfsa2021-55/

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?



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