5 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
6.9 Medium
AI Score
Confidence
High
0.038 Low
EPSS
Percentile
91.9%
CVE-2020-12100: Parsing mails with a large number of MIME parts could have resulted in excessive CPU usage or a crash due to running out of stack memory. CVE-2020-12673: Dovecot’s NTLM implementation does not correctly check message buffer size, which leads to reading past allocation which can lead to crash. CVE-2020-10967: lmtp/submission:
Issuing the RCPT command with an address that has the empty quoted string as local-part causes the lmtp service to crash. CVE-2020-12674:
Dovecot’s RPA mechanism implementation accepts zero-length message, which leads to assert-crash later on.
Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website.
Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Fedora Security Advisory FEDORA-2020-cd8b8f887b.
#
include('compat.inc');
if (description)
{
script_id(140232);
script_version("1.3");
script_set_attribute(attribute:"plugin_modification_date", value:"2024/02/22");
script_cve_id(
"CVE-2020-10967",
"CVE-2020-12100",
"CVE-2020-12673",
"CVE-2020-12674"
);
script_xref(name:"FEDORA", value:"2020-cd8b8f887b");
script_name(english:"Fedora 31 : 1:dovecot (2020-cd8b8f887b)");
script_set_attribute(attribute:"synopsis", value:
"The remote Fedora host is missing a security update.");
script_set_attribute(attribute:"description", value:
"CVE-2020-12100: Parsing mails with a large number of MIME parts could
have resulted in excessive CPU usage or a crash due to running out of
stack memory. CVE-2020-12673: Dovecot's NTLM implementation does not
correctly check message buffer size, which leads to reading past
allocation which can lead to crash. CVE-2020-10967: lmtp/submission:
Issuing the RCPT command with an address that has the empty quoted
string as local-part causes the lmtp service to crash. CVE-2020-12674:
Dovecot's RPA mechanism implementation accepts zero-length message,
which leads to assert-crash later on.
Note that Tenable Network Security has extracted the preceding
description block directly from the Fedora update system website.
Tenable has attempted to automatically clean and format it as much as
possible without introducing additional issues.");
script_set_attribute(attribute:"see_also", value:"https://bodhi.fedoraproject.org/updates/FEDORA-2020-cd8b8f887b");
script_set_attribute(attribute:"solution", value:
"Update the affected 1:dovecot package.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P");
script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H");
script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-12674");
script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
script_set_attribute(attribute:"exploit_available", value:"true");
script_set_attribute(attribute:"vuln_publication_date", value:"2020/05/18");
script_set_attribute(attribute:"patch_publication_date", value:"2020/09/03");
script_set_attribute(attribute:"plugin_publication_date", value:"2020/09/04");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fedoraproject:fedora:1:dovecot");
script_set_attribute(attribute:"cpe", value:"cpe:/o:fedoraproject:fedora:31");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Fedora Local Security Checks");
script_copyright(english:"This script is Copyright (C) 2020-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("ssh_get_info.nasl");
script_require_keys("Host/local_checks_enabled", "Host/RedHat/release", "Host/RedHat/rpm-list");
exit(0);
}
include("audit.inc");
include("global_settings.inc");
include("rpm.inc");
if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item("Host/RedHat/release");
if (isnull(release) || "Fedora" >!< release) audit(AUDIT_OS_NOT, "Fedora");
os_ver = pregmatch(pattern: "Fedora.*release ([0-9]+)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Fedora");
os_ver = os_ver[1];
if (! preg(pattern:"^31([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Fedora 31", "Fedora " + os_ver);
if (!get_kb_item("Host/RedHat/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);
cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Fedora", cpu);
flag = 0;
if (rpm_check(release:"FC31", reference:"dovecot-2.3.11.3-4.fc31", epoch:"1")) flag++;
if (flag)
{
security_report_v4(
port : 0,
severity : SECURITY_WARNING,
extra : rpm_report_get()
);
exit(0);
}
else
{
tested = pkg_tests_get();
if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
else audit(AUDIT_PACKAGE_NOT_INSTALLED, "1:dovecot");
}
Vendor | Product | Version | CPE |
---|---|---|---|
fedoraproject | fedora | 1 | p-cpe:/a:fedoraproject:fedora:1:dovecot |
fedoraproject | fedora | 31 | cpe:/o:fedoraproject:fedora:31 |
5 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
6.9 Medium
AI Score
Confidence
High
0.038 Low
EPSS
Percentile
91.9%