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CVE-2021-23993

Status Candidate

Overview

An attacker may perform a DoS attack to prevent a user from sending encrypted email to a correspondent. If an attacker creates a crafted OpenPGP key with a subkey that has an invalid self signature, and the Thunderbird user imports the crafted key, then Thunderbird may try to use the invalid subkey, but the RNP library rejects it from being used, causing encryption to fail. This vulnerability affects Thunderbird < 78.9.1.

Related Files

Debian Security Advisory 4897-1
Posted Apr 28, 2021
Authored by Debian | Site debian.org

Debian Linux Security Advisory 4897-1 - Multiple security issues were discovered in Thunderbird, which could result in the execution of arbitrary code or information disclosure. In adddition a number of security issues were addressed in the OpenPGP support.

tags | advisory, arbitrary, info disclosure
systems | linux, debian
advisories | CVE-2021-23961, CVE-2021-23991, CVE-2021-23992, CVE-2021-23993, CVE-2021-23994, CVE-2021-23995, CVE-2021-23998, CVE-2021-23999, CVE-2021-24002, CVE-2021-29945, CVE-2021-29946, CVE-2021-29948, CVE-2021-29949
SHA-256 | d046261a5bea547646c1ad71555d4faa8f38e2e133e219e9721c0bfe1ba81218
Red Hat Security Advisory 2021-1201-01
Posted Apr 15, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-1201-01 - Mozilla Thunderbird is a standalone mail and newsgroup client. This update upgrades Thunderbird to version 78.9.1.

tags | advisory
systems | linux, redhat
advisories | CVE-2021-23991, CVE-2021-23992, CVE-2021-23993
SHA-256 | 820794c43836fe077b75190ec69858bae073323c74eae7a8f16a6336ebcd5e5e
Red Hat Security Advisory 2021-1192-01
Posted Apr 14, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-1192-01 - Mozilla Thunderbird is a standalone mail and newsgroup client. This update upgrades Thunderbird to version 78.9.1.

tags | advisory
systems | linux, redhat
advisories | CVE-2021-23991, CVE-2021-23992, CVE-2021-23993
SHA-256 | c948e9ec428568d27a15b05550951abc57ff9feb310c82e6b96d46880c3ddbdd
Red Hat Security Advisory 2021-1193-01
Posted Apr 14, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-1193-01 - Mozilla Thunderbird is a standalone mail and newsgroup client. This update upgrades Thunderbird to version 78.9.1.

tags | advisory
systems | linux, redhat
advisories | CVE-2021-23991, CVE-2021-23992, CVE-2021-23993
SHA-256 | 332440aa23616d424274ca68a996e31b6e75368d0d74703d69046824987fb3b4
Red Hat Security Advisory 2021-1190-01
Posted Apr 14, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-1190-01 - Mozilla Thunderbird is a standalone mail and newsgroup client. This update upgrades Thunderbird to version 78.9.1.

tags | advisory
systems | linux, redhat
advisories | CVE-2021-23991, CVE-2021-23992, CVE-2021-23993
SHA-256 | b4855587d2c21eaa956921785d37b83cebbf547204ef5645662bbd6c3b731c03
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