Vulnerabilities > CVE-2019-19783 - Improper Privilege Management vulnerability in multiple products
Attack vector
NETWORK Attack complexity
LOW Privileges required
LOW Confidentiality impact
NONE Integrity impact
HIGH Availability impact
NONE Summary
An issue was discovered in Cyrus IMAP before 2.5.15, 3.0.x before 3.0.13, and 3.1.x through 3.1.8. If sieve script uploading is allowed (3.x) or certain non-default sieve options are enabled (2.x), a user with a mail account on the service can use a sieve script containing a fileinto directive to create any mailbox with administrator privileges, because of folder mishandling in autosieve_createfolder() in imap/lmtp_sieve.c.
Vulnerable Configurations
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- Restful Privilege Elevation Rest uses standard HTTP (Get, Put, Delete) style permissions methods, but these are not necessarily correlated generally with back end programs. Strict interpretation of HTTP get methods means that these HTTP Get services should not be used to delete information on the server, but there is no access control mechanism to back up this logic. This means that unless the services are properly ACL'd and the application's service implementation are following these guidelines then an HTTP request can easily execute a delete or update on the server side. The attacker identifies a HTTP Get URL such as http://victimsite/updateOrder, which calls out to a program to update orders on a database or other resource. The URL is not idempotent so the request can be submitted multiple times by the attacker, additionally, the attacker may be able to exploit the URL published as a Get method that actually performs updates (instead of merely retrieving data). This may result in malicious or inadvertent altering of data on the server.
Nessus
NASL family Fedora Local Security Checks NASL id FEDORA_2019-7938C21723.NASL description Update to new upstream version 3.0.13, which includes a fix for CVE-2019-19783 and other minor fixes. Release notes: https://www.cyrusimap.org/imap/download/release-notes/3.0/x/3.0.13.htm l 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. last seen 2020-06-01 modified 2020-06-02 plugin id 132650 published 2020-01-06 reporter This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/132650 title Fedora 30 : cyrus-imapd (2019-7938c21723) code # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from Fedora Security Advisory FEDORA-2019-7938c21723. # include("compat.inc"); if (description) { script_id(132650); script_version("1.2"); script_cvs_date("Date: 2020/01/08"); script_cve_id("CVE-2019-19783"); script_xref(name:"FEDORA", value:"2019-7938c21723"); script_name(english:"Fedora 30 : cyrus-imapd (2019-7938c21723)"); script_summary(english:"Checks rpm output for the updated package."); script_set_attribute( attribute:"synopsis", value:"The remote Fedora host is missing a security update." ); script_set_attribute( attribute:"description", value: "Update to new upstream version 3.0.13, which includes a fix for CVE-2019-19783 and other minor fixes. Release notes: https://www.cyrusimap.org/imap/download/release-notes/3.0/x/3.0.13.htm l 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-2019-7938c21723" ); # https://www.cyrusimap.org/imap/download/release-notes/3.0/x/3.0.13.html script_set_attribute( attribute:"see_also", value:"http://www.nessus.org/u?c4e167ad" ); script_set_attribute( attribute:"solution", value:"Update the affected cyrus-imapd package." ); script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:S/C:N/I:P/A:N"); script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C"); script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N"); script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C"); script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fedoraproject:fedora:cyrus-imapd"); script_set_attribute(attribute:"cpe", value:"cpe:/o:fedoraproject:fedora:30"); script_set_attribute(attribute:"vuln_publication_date", value:"2019/12/16"); script_set_attribute(attribute:"patch_publication_date", value:"2020/01/04"); script_set_attribute(attribute:"plugin_publication_date", value:"2020/01/06"); script_set_attribute(attribute:"generated_plugin", value:"current"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_copyright(english:"This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof."); script_family(english:"Fedora Local Security Checks"); 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:"^30([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Fedora 30", "Fedora " + os_ver); if (!get_kb_item("Host/RedHat/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING); cpu = get_kb_item("Host/cpu"); if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH); if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Fedora", cpu); flag = 0; if (rpm_check(release:"FC30", reference:"cyrus-imapd-3.0.13-1.fc30")) flag++; if (flag) { security_report_v4( port : 0, severity : SECURITY_NOTE, 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, "cyrus-imapd"); }NASL family Fedora Local Security Checks NASL id FEDORA_2019-AD23A4522D.NASL description Update to new upstream version 3.0.13, which includes a fix for CVE-2019-19783 and other minor fixes. Release notes: https://www.cyrusimap.org/imap/download/release-notes/3.0/x/3.0.13.htm l 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. last seen 2020-06-01 modified 2020-06-02 plugin id 132656 published 2020-01-06 reporter This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/132656 title Fedora 31 : cyrus-imapd (2019-ad23a4522d) code # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from Fedora Security Advisory FEDORA-2019-ad23a4522d. # include("compat.inc"); if (description) { script_id(132656); script_version("1.2"); script_cvs_date("Date: 2020/01/08"); script_cve_id("CVE-2019-19783"); script_xref(name:"FEDORA", value:"2019-ad23a4522d"); script_name(english:"Fedora 31 : cyrus-imapd (2019-ad23a4522d)"); script_summary(english:"Checks rpm output for the updated package."); script_set_attribute( attribute:"synopsis", value:"The remote Fedora host is missing a security update." ); script_set_attribute( attribute:"description", value: "Update to new upstream version 3.0.13, which includes a fix for CVE-2019-19783 and other minor fixes. Release notes: https://www.cyrusimap.org/imap/download/release-notes/3.0/x/3.0.13.htm l 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-2019-ad23a4522d" ); # https://www.cyrusimap.org/imap/download/release-notes/3.0/x/3.0.13.html script_set_attribute( attribute:"see_also", value:"http://www.nessus.org/u?c4e167ad" ); script_set_attribute( attribute:"solution", value:"Update the affected cyrus-imapd package." ); script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:S/C:N/I:P/A:N"); script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C"); script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N"); script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C"); script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fedoraproject:fedora:cyrus-imapd"); script_set_attribute(attribute:"cpe", value:"cpe:/o:fedoraproject:fedora:31"); script_set_attribute(attribute:"vuln_publication_date", value:"2019/12/16"); script_set_attribute(attribute:"patch_publication_date", value:"2020/01/05"); script_set_attribute(attribute:"plugin_publication_date", value:"2020/01/06"); script_set_attribute(attribute:"generated_plugin", value:"current"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_copyright(english:"This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof."); script_family(english:"Fedora Local Security Checks"); 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:"cyrus-imapd-3.0.13-1.fc31")) flag++; if (flag) { security_report_v4( port : 0, severity : SECURITY_NOTE, 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, "cyrus-imapd"); }NASL family Debian Local Security Checks NASL id DEBIAN_DSA-4590.NASL description It was discovered that the lmtpd component of the Cyrus IMAP server created mailboxes with administrator privileges if the last seen 2020-06-01 modified 2020-06-02 plugin id 132326 published 2019-12-20 reporter This script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/132326 title Debian DSA-4590-1 : cyrus-imapd - security update code # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from Debian Security Advisory DSA-4590. The text # itself is copyright (C) Software in the Public Interest, Inc. # include("compat.inc"); if (description) { script_id(132326); script_version("1.4"); script_cvs_date("Date: 2019/12/31"); script_cve_id("CVE-2019-19783"); script_xref(name:"DSA", value:"4590"); script_name(english:"Debian DSA-4590-1 : cyrus-imapd - security update"); script_summary(english:"Checks dpkg output for the updated package"); script_set_attribute( attribute:"synopsis", value:"The remote Debian host is missing a security-related update." ); script_set_attribute( attribute:"description", value: "It was discovered that the lmtpd component of the Cyrus IMAP server created mailboxes with administrator privileges if the 'fileinto' was used, bypassing ACL checks." ); script_set_attribute( attribute:"see_also", value:"https://security-tracker.debian.org/tracker/source-package/cyrus-imapd" ); script_set_attribute( attribute:"see_also", value:"https://packages.debian.org/source/stretch/cyrus-imapd" ); script_set_attribute( attribute:"see_also", value:"https://packages.debian.org/source/buster/cyrus-imapd" ); script_set_attribute( attribute:"see_also", value:"https://www.debian.org/security/2019/dsa-4590" ); script_set_attribute( attribute:"solution", value: "Upgrade the cyrus-imapd packages. For the oldstable distribution (stretch), this problem has been fixed in version 2.5.10-3+deb9u2. For the stable distribution (buster), this problem has been fixed in version 3.0.8-6+deb10u3." ); script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:S/C:N/I:P/A:N"); script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C"); script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N"); script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C"); script_set_attribute(attribute:"cvss_score_source", value:"CVE-2019-19783"); script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:cyrus-imapd"); script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:10.0"); script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:9.0"); script_set_attribute(attribute:"vuln_publication_date", value:"2019/12/16"); script_set_attribute(attribute:"patch_publication_date", value:"2019/12/19"); script_set_attribute(attribute:"plugin_publication_date", value:"2019/12/20"); script_set_attribute(attribute:"generated_plugin", value:"current"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_copyright(english:"This script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof."); script_family(english:"Debian Local Security Checks"); script_dependencies("ssh_get_info.nasl"); script_require_keys("Host/local_checks_enabled", "Host/Debian/release", "Host/Debian/dpkg-l"); exit(0); } include("audit.inc"); include("debian_package.inc"); if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED); if (!get_kb_item("Host/Debian/release")) audit(AUDIT_OS_NOT, "Debian"); if (!get_kb_item("Host/Debian/dpkg-l")) audit(AUDIT_PACKAGE_LIST_MISSING); flag = 0; if (deb_check(release:"10.0", prefix:"cyrus-admin", reference:"3.0.8-6+deb10u3")) flag++; if (deb_check(release:"10.0", prefix:"cyrus-caldav", reference:"3.0.8-6+deb10u3")) flag++; if (deb_check(release:"10.0", prefix:"cyrus-clients", reference:"3.0.8-6+deb10u3")) flag++; if (deb_check(release:"10.0", prefix:"cyrus-common", reference:"3.0.8-6+deb10u3")) flag++; if (deb_check(release:"10.0", prefix:"cyrus-dev", reference:"3.0.8-6+deb10u3")) flag++; if (deb_check(release:"10.0", prefix:"cyrus-doc", reference:"3.0.8-6+deb10u3")) flag++; if (deb_check(release:"10.0", prefix:"cyrus-imapd", reference:"3.0.8-6+deb10u3")) flag++; if (deb_check(release:"10.0", prefix:"cyrus-murder", reference:"3.0.8-6+deb10u3")) flag++; if (deb_check(release:"10.0", prefix:"cyrus-nntpd", reference:"3.0.8-6+deb10u3")) flag++; if (deb_check(release:"10.0", prefix:"cyrus-pop3d", reference:"3.0.8-6+deb10u3")) flag++; if (deb_check(release:"10.0", prefix:"cyrus-replication", reference:"3.0.8-6+deb10u3")) flag++; if (deb_check(release:"10.0", prefix:"libcyrus-imap-perl", reference:"3.0.8-6+deb10u3")) flag++; if (deb_check(release:"9.0", prefix:"cyrus-admin", reference:"2.5.10-3+deb9u2")) flag++; if (deb_check(release:"9.0", prefix:"cyrus-caldav", reference:"2.5.10-3+deb9u2")) flag++; if (deb_check(release:"9.0", prefix:"cyrus-clients", reference:"2.5.10-3+deb9u2")) flag++; if (deb_check(release:"9.0", prefix:"cyrus-common", reference:"2.5.10-3+deb9u2")) flag++; if (deb_check(release:"9.0", prefix:"cyrus-dev", reference:"2.5.10-3+deb9u2")) flag++; if (deb_check(release:"9.0", prefix:"cyrus-doc", reference:"2.5.10-3+deb9u2")) flag++; if (deb_check(release:"9.0", prefix:"cyrus-imapd", reference:"2.5.10-3+deb9u2")) flag++; if (deb_check(release:"9.0", prefix:"cyrus-murder", reference:"2.5.10-3+deb9u2")) flag++; if (deb_check(release:"9.0", prefix:"cyrus-nntpd", reference:"2.5.10-3+deb9u2")) flag++; if (deb_check(release:"9.0", prefix:"cyrus-pop3d", reference:"2.5.10-3+deb9u2")) flag++; if (deb_check(release:"9.0", prefix:"cyrus-replication", reference:"2.5.10-3+deb9u2")) flag++; if (deb_check(release:"9.0", prefix:"libcyrus-imap-perl", reference:"2.5.10-3+deb9u2")) flag++; if (flag) { if (report_verbosity > 0) security_note(port:0, extra:deb_report_get()); else security_note(0); exit(0); } else audit(AUDIT_HOST_NOT, "affected");
References
- https://www.cyrusimap.org/imap/download/release-notes/2.5/x/2.5.15.html
- https://www.cyrusimap.org/imap/download/release-notes/3.0/x/3.0.13.html
- https://seclists.org/bugtraq/2019/Dec/38
- https://www.debian.org/security/2019/dsa-4590
- https://security.gentoo.org/glsa/202006-23
- https://usn.ubuntu.com/4566-1/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2DIV4HQ6LG5GPRO4B5Z2NHCZUPBUVVVF/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6IGOO5UGEBBDPN7B2YXLK7I7L3Y35EBA/