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.

The remote Ubuntu 18.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-4995-2 advisory.

    USN-4995-1 fixed vulnerabilities in Thunderbird. This update provides the corresponding updates for Ubuntu     18.04 LTS.



Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Ubuntu 20.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-4995-1 advisory.

    Multiple security issues were discovered in Thunderbird. If a user were tricked into opening a specially     crafted website in a browsing context, an attacker could potentially exploit these to cause a denial of     service, obtain sensitive information, spoof the UI, bypass security restrictions, or execute arbitrary     code. (CVE-2021-23961, CVE-2021-23981, CVE-2021-23982, CVE-2021-23987, CVE-2021-23994, CVE-2021-23998,     CVE-2021-23999, CVE-2021-29945, CVE-2021-29946, CVE-2021-29967)

    It was discovered that extensions could open popup windows with control of the window title in some     circumstances. If a user were tricked into installing a specially crafted extension, an attacker could     potentially exploit this to spoof a website and trick the user into providing credentials.
    (CVE-2021-23984)

    Multiple security issues were discovered in Thunderbird's OpenPGP integration. If a user were tricked into     importing a specially crafted key in some circumstances, an attacker could potentially exploit this to     cause a denial of service (inability to send encrypted email) or confuse the user. (CVE-2021-23991,     CVE-2021-23992, CVE-2021-23993)

    A use-after-free was discovered when Responsive Design Mode was enabled. If a user were tricked into     opening a specially crafted website with Responsive Design Mode enabled, an attacker could potentially     exploit this to cause a denial of service, or execute arbitrary code. (CVE-2021-23995)

    It was discovered that Thunderbird mishandled ftp URLs with encoded newline characters. If a user were     tricked into clicking on a specially crafted link, an attacker could potentially exploit this to send     arbitrary FTP commands. (CVE-2021-24002)

    It was discovered that Thunderbird wrote signatures to disk and read them back during verification. A     local attacker could potentially exploit this to replace the data with another signature file.
    (CVE-2021-29948)

    It was discovered that Thunderbird might load an alternative OTR library. If a user were tricked into     copying a specially crafted library to one of Thunderbird's search paths, an attacker could potentially     exploit this to execute arbitrary code. (CVE-2021-29949)

    It was discovered that secret keys imported into Thunderbird were stored unencrypted. A local attacker     could potentially exploit this to obtain private keys. (CVE-2021-29956)

    It was discovered that Thunderbird did not indicate when an inline signed or encrypted message contained     additional unprotected parts. (CVE-2021-29957)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of thunderbird installed on the remote host is prior to 78.10.0-1. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2021-1644 advisory.

  - Further techniques that built on the slipstream research combined with a malicious webpage could have     exposed both an internal network's hosts as well as services running on the user's local machine. This     vulnerability affects Firefox < 85. (CVE-2021-23961)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

This update for MozillaThunderbird fixes the following issues :

  - Mozilla Thunderbird was updated to version 78.9.1 (MFSA     2021-12,MFSA 2021-13, bsc#1183942, bsc#1184536)

  - CVE-2021-23981: Texture upload into an unbound backing     buffer resulted in an out-of-bound read

  - CVE-2021-23982: Internal network hosts could have been     probed by a malicious webpage

  - CVE-2021-23984: Malicious extensions could have spoofed     popup information

  - CVE-2021-23987: Memory safety bugs

  - CVE-2021-23991: An attacker may use Thunderbird's     OpenPGP key refresh mechanism to poison an existing key

  - CVE-2021-23992: A crafted OpenPGP key with an invalid     user ID could be used to confuse the user

  - CVE-2021-23993: Inability to send encrypted OpenPGP     email after importing a crafted OpenPGP key

  - cleaned up and fixed mozilla.sh.in for wayland     (bsc#1177542)

This update was imported from the SUSE:SLE-15-SP2:Update update project.

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.

For Debian 9 stretch, these problems have been fixed in version 1:78.10.0-1~deb9u1.

We recommend that you upgrade your thunderbird packages.

For the detailed security status of thunderbird please refer to its security tracker page at:
https://security-tracker.debian.org/tracker/thunderbird

NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Multiple security issues were discovered in Thunderbird, which could result in the execution of arbitrary code or information disclosure.
In addition a number of security issues were addressed in the OpenPGP support.

The remote CentOS Linux 7 host has a package installed that is affected by multiple vulnerabilities as referenced in the RHSA-2021:1192 advisory.

  - If a Thunderbird user has previously imported Alice's OpenPGP key, and Alice has extended the validity     period of her key, but Alice's updated key has not yet been imported, an attacker may send an email     containing a crafted version of Alice's key with an invalid subkey, Thunderbird might subsequently attempt     to use the invalid subkey, and will fail to send encrypted email to Alice. This vulnerability affects     Thunderbird < 78.9.1. (CVE-2021-23991)

  - Thunderbird did not check if the user ID associated with an OpenPGP key has a valid self signature. An     attacker may create a crafted version of an OpenPGP key, by either replacing the original user ID, or by     adding another user ID. If Thunderbird imports and accepts the crafted key, the Thunderbird user may     falsely conclude that the false user ID belongs to the correspondent. This vulnerability affects     Thunderbird < 78.9.1. (CVE-2021-23992)

  - 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. (CVE-2021-23993)

  - When loading the shared library that provides the OTR protocol implementation, Thunderbird will initially     attempt to open it using a filename that isn't distributed by Thunderbird. If a computer has already been     infected with a malicious library of the alternative filename, and the malicious library has been copied     to a directory that is contained in the search path for executable libraries, then Thunderbird will load     the incorrect library. This vulnerability affects Thunderbird < 78.9.1. (CVE-2021-29949)

  - Thunderbird unprotects a secret OpenPGP key prior to using it for a decryption, signing or key import     task. If the task runs into a failure, the secret key may remain in memory in its unprotected state. This     vulnerability affects Thunderbird < 78.8.1. (CVE-2021-29950)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote CentOS Linux 8 host has a package installed that is affected by multiple vulnerabilities as referenced in the CESA-2021:1193 advisory.

  - Mozilla: An attacker may use Thunderbird's OpenPGP key refresh mechanism to poison an existing key     (CVE-2021-23991)

  - Mozilla: A crafted OpenPGP key with an invalid user ID could be used to confuse the user (CVE-2021-23992)

  - Mozilla: Inability to send encrypted OpenPGP email after importing a crafted OpenPGP key (CVE-2021-23993)

  - Mozilla: Thunderbird might execute an alternative OTR library (CVE-2021-29949)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Oracle Linux 8 host has a package installed that is affected by multiple vulnerabilities as referenced in the ELSA-2021-1193 advisory.

    [78.9.1-1.0.1]
    - Replaced thunderbird-redhat-default-prefs.js with thunderbird-oracle-default-prefs.js

    [78.9.1-1]
    - Update to 78.9.1

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Oracle Linux 7 host has a package installed that is affected by multiple vulnerabilities as referenced in the ELSA-2021-1192 advisory.

    [78.9.1-1.0.1]
    - Replaced thunderbird-redhat-default-prefs.js with thunderbird-oracle-default-prefs.js

    [78.9.1-1]
    - Update to 78.9.1

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 7 host has a package installed that is affected by multiple vulnerabilities as referenced in the RHSA-2021:1192 advisory.

    Mozilla Thunderbird is a standalone mail and newsgroup client.

    This update upgrades Thunderbird to version 78.9.1.

    Security Fix(es):

    * Mozilla: An attacker may use Thunderbird's OpenPGP key refresh mechanism to poison an existing key     (CVE-2021-23991)

    * Mozilla: A crafted OpenPGP key with an invalid user ID could be used to confuse the user     (CVE-2021-23992)

    * Mozilla: Inability to send encrypted OpenPGP email after importing a crafted OpenPGP key     (CVE-2021-23993)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 8 host has a package installed that is affected by multiple vulnerabilities as referenced in the RHSA-2021:1201 advisory.

    Mozilla Thunderbird is a standalone mail and newsgroup client.

    This update upgrades Thunderbird to version 78.9.1.

    Security Fix(es):

    * Mozilla: An attacker may use Thunderbird's OpenPGP key refresh mechanism to poison an existing key     (CVE-2021-23991)

    * Mozilla: A crafted OpenPGP key with an invalid user ID could be used to confuse the user     (CVE-2021-23992)

    * Mozilla: Inability to send encrypted OpenPGP email after importing a crafted OpenPGP key     (CVE-2021-23993)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 8 host has a package installed that is affected by multiple vulnerabilities as referenced in the RHSA-2021:1193 advisory.

    Mozilla Thunderbird is a standalone mail and newsgroup client.

    This update upgrades Thunderbird to version 78.9.1.

    Security Fix(es):

    * Mozilla: An attacker may use Thunderbird's OpenPGP key refresh mechanism to poison an existing key     (CVE-2021-23991)

    * Mozilla: A crafted OpenPGP key with an invalid user ID could be used to confuse the user     (CVE-2021-23992)

    * Mozilla: Inability to send encrypted OpenPGP email after importing a crafted OpenPGP key     (CVE-2021-23993)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 8 host has a package installed that is affected by multiple vulnerabilities as referenced in the RHSA-2021:1190 advisory.

    Mozilla Thunderbird is a standalone mail and newsgroup client.

    This update upgrades Thunderbird to version 78.9.1.

    Security Fix(es):

    * Mozilla: An attacker may use Thunderbird's OpenPGP key refresh mechanism to poison an existing key     (CVE-2021-23991)

    * Mozilla: A crafted OpenPGP key with an invalid user ID could be used to confuse the user     (CVE-2021-23992)

    * Mozilla: Inability to send encrypted OpenPGP email after importing a crafted OpenPGP key     (CVE-2021-23993)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of Thunderbird installed on the remote macOS or Mac OS X host is prior to 78.9.1. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2021-13 advisory.

  - If a Thunderbird user has previously imported Alice's OpenPGP key, and Alice has extended the validity     period of her key, but Alice's updated key has not yet been imported, an attacker may send an email     containing a crafted version of Alice's key with an invalid subkey, Thunderbird might subsequently attempt     to use the invalid subkey, and will fail to send encrypted email to Alice. (CVE-2021-23991)

  - Thunderbird did not check if the user ID associated with an OpenPGP key has a valid self signature. An     attacker may create a crafted version of an OpenPGP key, by either replacing the original user ID, or by     adding another user ID. If Thunderbird imports and accepts the crafted key, the Thunderbird user may     falsely conclude that the false user ID belongs to the correspondent. (CVE-2021-23992)

  - 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. (CVE-2021-23993)

  - When loading the shared library that provides the OTR protocol implementation, Thunderbird will initially     attempt to open it using a filename that isn't distributed by Thunderbird. If a computer has already been     infected with a malicious library of the alternative filename, and the malicious library has been copied     to a directory that is contained in the search path for executable libraries, then Thunderbird will load     the incorrect library. (CVE-2021-29949)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The version of Thunderbird installed on the remote Windows host is prior to 78.9.1. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2021-13 advisory.

  - If a Thunderbird user has previously imported Alice's OpenPGP key, and Alice has extended the validity     period of her key, but Alice's updated key has not yet been imported, an attacker may send an email     containing a crafted version of Alice's key with an invalid subkey, Thunderbird might subsequently attempt     to use the invalid subkey, and will fail to send encrypted email to Alice. (CVE-2021-23991)

  - Thunderbird did not check if the user ID associated with an OpenPGP key has a valid self signature. An     attacker may create a crafted version of an OpenPGP key, by either replacing the original user ID, or by     adding another user ID. If Thunderbird imports and accepts the crafted key, the Thunderbird user may     falsely conclude that the false user ID belongs to the correspondent. (CVE-2021-23992)

  - 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. (CVE-2021-23993)

  - When loading the shared library that provides the OTR protocol implementation, Thunderbird will initially     attempt to open it using a filename that isn't distributed by Thunderbird. If a computer has already been     infected with a malicious library of the alternative filename, and the malicious library has been copied     to a directory that is contained in the search path for executable libraries, then Thunderbird will load     the incorrect library. (CVE-2021-29949)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Severity
151017	Ubuntu 18.04 LTS : Thunderbird vulnerabilities (USN-4995-2)	Nessus	Ubuntu Local Security Checks	high
150949	Ubuntu 20.04 LTS : Thunderbird vulnerabilities (USN-4995-1)	Nessus	Ubuntu Local Security Checks	high
149863	Amazon Linux 2 : thunderbird (ALAS-2021-1644)	Nessus	Amazon Linux Local Security Checks	high
149555	openSUSE Security Update : MozillaThunderbird (openSUSE-2021-580)	Nessus	SuSE Local Security Checks	high
148965	Debian DLA-2632-1 : thunderbird security update	Nessus	Debian Local Security Checks	high
148964	Debian DSA-4897-1 : thunderbird - security update	Nessus	Debian Local Security Checks	high
148882	CentOS 7 : thunderbird (RHSA-2021:1192)	Nessus	CentOS Local Security Checks	high
148687	CentOS 8 : thunderbird (CESA-2021:1193)	Nessus	CentOS Local Security Checks	high
148644	Oracle Linux 8 : thunderbird (ELSA-2021-1193)	Nessus	Oracle Linux Local Security Checks	medium
148571	Oracle Linux 7 : thunderbird (ELSA-2021-1192)	Nessus	Oracle Linux Local Security Checks	medium
148570	RHEL 7 : thunderbird (RHSA-2021:1192)	Nessus	Red Hat Local Security Checks	high
148569	RHEL 8 : thunderbird (RHSA-2021:1201)	Nessus	Red Hat Local Security Checks	high
148561	RHEL 8 : thunderbird (RHSA-2021:1193)	Nessus	Red Hat Local Security Checks	high
148543	RHEL 8 : thunderbird (RHSA-2021:1190)	Nessus	Red Hat Local Security Checks	high
148396	Mozilla Thunderbird < 78.9.1	Nessus	MacOS X Local Security Checks	high
148395	Mozilla Thunderbird < 78.9.1	Nessus	Windows	high

Detections

Analytics

CVE-2021-23993

medium

Tenable Plugins

high

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medium

medium

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high