rfc822.c in Mutt through 2.0.4 allows remote attackers to cause a denial of service (mailbox unavailability) by sending email messages with sequences of semicolon characters in RFC822 address fields (aka terminators of empty groups). A small email message from the attacker can cause large memory consumption, and the victim may then be unable to see email messages from other persons.

This plugin has been deprecated as it does not adhere to established standards for this style of check.

The remote Rocky Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RLSA-2021:4181 advisory.

  - Mutt before 2.0.2 and NeoMutt before 2020-11-20 did not ensure that $ssl_force_tls was processed if an     IMAP server's initial server response was invalid. The connection was not properly closed, and the code     could continue attempting to authenticate. This could result in authentication credentials being exposed     on an unencrypted connection, or to a machine-in-the-middle. (CVE-2020-28896)

  - rfc822.c in Mutt through 2.0.4 allows remote attackers to cause a denial of service (mailbox     unavailability) by sending email messages with sequences of semicolon characters in RFC822 address fields     (aka terminators of empty groups). A small email message from the attacker can cause large memory     consumption, and the victim may then be unable to see email messages from other persons. (CVE-2021-3181)

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 8 host has a package installed that is affected by multiple vulnerabilities as referenced in the ELSA-2021-4181 advisory.

    [5:2.0.7-1]
    - Upgrade to v2.0.7
    - New bug fix release
    - Resolves: #1912614

    [5:2.0.6-1]
    - Upgrade to v2.0.6
    - Resolves: #1912614

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 version of mutt installed on the remote host is prior to 1.5.21-29. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2022-1892 advisory.

  - Mutt before 1.14.3 allows an IMAP fcc/postpone man-in-the-middle attack via a PREAUTH response.
    (CVE-2020-14093)

  - Mutt before 1.14.3 proceeds with a connection even if, in response to a GnuTLS certificate prompt, the     user rejects an expired intermediate certificate. (CVE-2020-14154)

  - Mutt before 1.14.4 and NeoMutt before 2020-06-19 have a STARTTLS buffering issue that affects IMAP, SMTP,     and POP3. When a server sends a begin TLS response, the client reads additional data (e.g., from a man-     in-the-middle attacker) and evaluates it in a TLS context, aka response injection. (CVE-2020-14954)

  - Mutt before 2.0.2 and NeoMutt before 2020-11-20 did not ensure that $ssl_force_tls was processed if an     IMAP server's initial server response was invalid. The connection was not properly closed, and the code     could continue attempting to authenticate. This could result in authentication credentials being exposed     on an unencrypted connection, or to a machine-in-the-middle. (CVE-2020-28896)

  - rfc822.c in Mutt through 2.0.4 allows remote attackers to cause a denial of service (mailbox     unavailability) by sending email messages with sequences of semicolon characters in RFC822 address fields     (aka terminators of empty groups). A small email message from the attacker can cause large memory     consumption, and the victim may then be unable to see email messages from other persons. (CVE-2021-3181)

  - Buffer Overflow in uudecoder in Mutt affecting all versions starting from 0.94.13 before 2.2.3 allows read     past end of input line (CVE-2022-1328)

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

The remote AlmaLinux 8 host has a package installed that is affected by multiple vulnerabilities as referenced in the ALSA-2021:4181 advisory.

  - Mutt before 2.0.2 and NeoMutt before 2020-11-20 did not ensure that $ssl_force_tls was processed if an     IMAP server's initial server response was invalid. The connection was not properly closed, and the code     could continue attempting to authenticate. This could result in authentication credentials being exposed     on an unencrypted connection, or to a machine-in-the-middle. (CVE-2020-28896)

  - rfc822.c in Mutt through 2.0.4 allows remote attackers to cause a denial of service (mailbox     unavailability) by sending email messages with sequences of semicolon characters in RFC822 address fields     (aka terminators of empty groups). A small email message from the attacker can cause large memory     consumption, and the victim may then be unable to see email messages from other persons. (CVE-2021-3181)

Note that Nessus has not tested for this issue 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-2021:4181 advisory.

    Mutt is a low resource, highly configurable, text-based MIME e-mail client. Mutt supports most e-mail     storing formats, such as mbox and Maildir, as well as most protocols, including POP3 and IMAP.

    The following packages have been upgraded to a later upstream version: mutt (2.0.7). (BZ#1912614)

    Security Fix(es):

    * mutt: Incorrect handling of invalid initial IMAP responses could lead to an authentication attempt over     unencrypted connection (CVE-2020-28896)

    * mutt: Memory leak when parsing rfc822 group addresses (CVE-2021-3181)

    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.

    Additional Changes:

    For detailed information on changes in this release, see the Red Hat Enterprise Linux 8.5 Release Notes     linked from 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 CentOS Linux 8 host has a package installed that is affected by multiple vulnerabilities as referenced in the CESA-2021:4181 advisory.

  - mutt: Incorrect handling of invalid initial IMAP responses could lead to an authentication attempt over     unencrypted connection (CVE-2020-28896)

  - mutt: Memory leak when parsing rfc822 group addresses (CVE-2021-3181)

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

According to the version of the mutt package installed, the EulerOS installation on the remote host is affected by the following vulnerability :

  - rfc822.c in Mutt through 2.0.4 allows remote attackers     to cause a denial of service (mailbox unavailability)     by sending email messages with sequences of semicolon     characters in RFC822 address fields (aka terminators of     empty groups). A small email message from the attacker     can cause large memory consumption, and the victim may     then be unable to see email messages from other     persons.(CVE-2021-3181)

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

The remote Fedora 33 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2021-a4f016c6c8 advisory.

  - rfc822.c in Mutt through 2.0.4 allows remote attackers to cause a denial of service (mailbox     unavailability) by sending email messages with sequences of semicolon characters in RFC822 address fields     (aka terminators of empty groups). A small email message from the attacker can cause large memory     consumption, and the victim may then be unable to see email messages from other persons. (CVE-2021-3181)

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

The remote Fedora 32 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2021-4205e1fc23 advisory.

  - rfc822.c in Mutt through 2.0.4 allows remote attackers to cause a denial of service (mailbox     unavailability) by sending email messages with sequences of semicolon characters in RFC822 address fields     (aka terminators of empty groups). A small email message from the attacker can cause large memory     consumption, and the victim may then be unable to see email messages from other persons. (CVE-2021-3181)

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

Tavis Ormandy discovered a memory leak flaw in the rfc822 group recipient parsing in Mutt, a text-based mailreader supporting MIME, GPG, PGP and threading, which could result in denial of service.

This update for mutt fixes the following issue :

  - CVE-2021-3181: Fixed a memory leak in recipient parsing     (bsc#1181221).

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

The remote host is affected by the vulnerability described in GLSA-202101-25 (Mutt: Denial of service)

    A memory leak could occur when a crafted email message is received.
  Impact :

    An attacker could cause a possible Denial of Service condition.
  Workaround :

    There is no known workaround at this time.

The remote Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS host has packages installed that are affected by a vulnerability as referenced in the USN-4703-1 advisory.

    It was discovered that Mutt incorrectly handled certain email messages. An attacker could possibly use     this issue to cause a denial of service.

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

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 mutt fixes the following issue :

CVE-2021-3181: Fixed a memory leak in recipient parsing (bsc#1181221).

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

Tavis Ormandy reports :

rfc822.c in Mutt through 2.0.4 allows remote attackers to cause a denial of service (mailbox unavailability) by sending email messages with sequences of semicolon characters in RFC822 address fields (aka terminators of empty groups). A small email message from the attacker can cause large memory consumption, and the victim may then be unable to see email messages from other persons.

rfc822.c in Mutt through 2.0.4 allows remote attackers to cause a denial of service (mailbox unavailability) by sending email messages with sequences of semicolon characters in RFC822 address fields (aka terminators of empty groups).

A small email message from the attacker can cause large memory consumption, and the victim may then be unable to see email messages from other persons.

For Debian 9 stretch, this problem has been fixed in version 1.7.2-1+deb9u5.

We recommend that you upgrade your mutt packages.

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

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.

ID	Name	Product	Family	Severity
196564	RHEL 6 : mutt (Unpatched Vulnerability) (deprecated)	Nessus	Red Hat Local Security Checks	critical
196517	RHEL 7 : mutt (Unpatched Vulnerability) (deprecated)	Nessus	Red Hat Local Security Checks	critical
184975	Rocky Linux 8 : mutt (RLSA-2021:4181)	Nessus	Rocky Linux Local Security Checks	medium
180902	Oracle Linux 8 : mutt (ELSA-2021-4181)	Nessus	Oracle Linux Local Security Checks	medium
168438	Amazon Linux 2 : mutt (ALAS-2022-1892)	Nessus	Amazon Linux Local Security Checks	medium
157505	AlmaLinux 8 : mutt (ALSA-2021:4181)	Nessus	Alma Linux Local Security Checks	medium
155210	RHEL 8 : mutt (RHSA-2021:4181)	Nessus	Red Hat Local Security Checks	medium
155036	CentOS 8 : mutt (CESA-2021:4181)	Nessus	CentOS Local Security Checks	medium
153309	EulerOS 2.0 SP2 : mutt (EulerOS-SA-2021-2409)	Nessus	Huawei Local Security Checks	medium
151783	EulerOS 2.0 SP5 : mutt (EulerOS-SA-2021-2224)	Nessus	Huawei Local Security Checks	medium
149198	EulerOS 2.0 SP3 : mutt (EulerOS-SA-2021-1819)	Nessus	Huawei Local Security Checks	medium
146370	Fedora 33 : 5:mutt (2021-a4f016c6c8)	Nessus	Fedora Local Security Checks	medium
146364	Fedora 32 : 5:mutt (2021-4205e1fc23)	Nessus	Fedora Local Security Checks	medium
145480	Debian DSA-4838-1 : mutt - security update	Nessus	Debian Local Security Checks	medium
145434	openSUSE Security Update : mutt (openSUSE-2021-162)	Nessus	SuSE Local Security Checks	medium
145431	openSUSE Security Update : mutt (openSUSE-2021-161)	Nessus	SuSE Local Security Checks	medium
145428	GLSA-202101-25 : Mutt: Denial of service	Nessus	Gentoo Local Security Checks	medium
145410	Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS : Mutt vulnerability (USN-4703-1)	Nessus	Ubuntu Local Security Checks	medium
145343	SUSE SLED15 / SLES15 Security Update : mutt (SUSE-SU-2021:0195-1)	Nessus	SuSE Local Security Checks	medium
145291	SUSE SLES12 Security Update : mutt (SUSE-SU-2021:0196-1)	Nessus	SuSE Local Security Checks	medium
145274	FreeBSD : mutt -- denial of service (387bbade-5d1d-11eb-bf20-4437e6ad11c4)	Nessus	FreeBSD Local Security Checks	medium
145237	Debian DLA-2529-1 : mutt security update	Nessus	Debian Local Security Checks	medium

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CVE-2021-3181

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