PT-2021-2751 · Mozilla+7 · Thunderbird+7

Wayne Mery + 1 · Published 2021-03-08 · Updated 2021-07-10 · CVE-2021-29950

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Name of the Vulnerable Software and Affected Versions: Thunderbird versions prior to 78.8.1

Description: The issue is related to errors in handling OpenPGP cryptographic signatures in the Thunderbird email client. Exploitation of this issue could allow a remote attacker to impact the confidentiality and integrity of protected information. Specifically, Thunderbird fails to protect a secret OpenPGP key before using it for decryption, signing, or key import tasks. If such a task fails, the secret key may remain in memory in its unprotected state.

Recommendations: For versions prior to 78.8.1, update to version 78.8.1 or later to resolve the issue. As a temporary workaround, consider restricting the use of OpenPGP keys in Thunderbird until the update is applied.

Exploit

Fix

Cleartext Storage of Sensitive Information

Insufficiently Protected Credentials

Weakness Enumeration

CWE-312

CWE-522

Related Identifiers

ALT-PU-2021-1804

ALT-PU-2021-1886

ALT-PU-2021-1892

BDU:2021-02287

CESA-2021_1192

CESA-2021_1193

CVE-2021-29950

DLA-2609-1

DSA-4876-1

OPENSUSE-SU-2021:1854-1

OPENSUSE-SU-2021_1854-1

RHSA-2021:1190

RHSA-2021:1192

RHSA-2021:1193

RHSA-2021:1201

RHSA-2021_1192

RHSA-2021_1193

SUSE-SU-2021:1854-1

USN-4936-1

Affected Products

Alt Linux

Astra Linux

Centos

Linuxmint

Red Hat

Suse

Thunderbird

Ubuntu

References · 36

• 🔥 https://bugzilla.mozilla.org/show_bug.cgi?id=1673239 · Exploit
• https://bdu.fstec.ru/vul/2021-02287 · Security Note
• https://ubuntu.com/security/CVE-2021-23968 · Vendor Advisory
• https://osv.dev/vulnerability/DSA-4876-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-23978 · Vendor Advisory
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-29950 · Security Note
• https://mozilla.org/en-US/security/advisories/mfsa2021-17 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-29950 · Security Note
• https://mozilla.org/security/advisories/mfsa2021-17 · Vendor Advisory
• https://mozilla.org/en-US/security/advisories/mfsa2021-17/#CVE-2021-29950 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-29950 · Vendor Advisory
• https://osv.dev/vulnerability/DLA-2609-1 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2021-29950 · Vendor Advisory
• https://ubuntu.com/security/notices/USN-4936-1 · Vendor Advisory
• https://osv.dev/vulnerability/USN-4936-1 · Vendor Advisory