Multiple vulnerabilities in Mozilla Thunderbird



Published: 2021-05-17
Risk Low
Patch available YES
Number of vulnerabilities 2
CVE-ID CVE-2021-29957
CVE-2021-29956
CWE-ID CWE-693
CWE-312
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) Protection Mechanism Failure

EUVDB-ID: #VU53307

Risk: Low

CVSSv3.1:

CVE-ID: CVE-2021-29957

CWE-ID: CWE-693 - Protection Mechanism Failure

Exploit availability: No

Description

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

The vulnerability exists due to insufficient implementation of security measures. If a MIME encoded email contains an OpenPGP inline signed or encrypted message part, but also contains an additional unprotected part, Thunderbird did not indicate that only parts of the message are protected.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Mozilla Thunderbird: 78.0 - 78.10.1


CPE2.3 External links

http://www.mozilla.org/en-US/security/advisories/mfsa2021-22/

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

2) Cleartext storage of sensitive information

EUVDB-ID: #VU53308

Risk: Low

CVSSv3.1:

CVE-ID: CVE-2021-29956

CWE-ID: CWE-312 - Cleartext Storage of Sensitive Information

Exploit availability: No

Description

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

The vulnerability exists due to OpenPGP secret keys that were imported using Thunderbird. were stored unencrypted on the user's local disk. The master password protection was inactive for those keys. A local user can gain access to sensitive information.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Mozilla Thunderbird: 78.8.1 - 78.10.1


CPE2.3 External links

http://www.mozilla.org/en-US/security/advisories/mfsa2021-22/

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?



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