Vulnerabilities > CVE-2019-7524 - Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in multiple products
Attack vector
LOCAL Attack complexity
LOW Privileges required
LOW Confidentiality impact
HIGH Integrity impact
HIGH Availability impact
HIGH Summary
In Dovecot before 2.2.36.3 and 2.3.x before 2.3.5.1, a local attacker can cause a buffer overflow in the indexer-worker process, which can be used to elevate to root. This occurs because of missing checks in the fts and pop3-uidl components.
Vulnerable Configurations
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- Buffer Overflow via Environment Variables This attack pattern involves causing a buffer overflow through manipulation of environment variables. Once the attacker finds that they can modify an environment variable, they may try to overflow associated buffers. This attack leverages implicit trust often placed in environment variables.
- Overflow Buffers Buffer Overflow attacks target improper or missing bounds checking on buffer operations, typically triggered by input injected by an attacker. As a consequence, an attacker is able to write past the boundaries of allocated buffer regions in memory, causing a program crash or potentially redirection of execution as per the attackers' choice.
- Client-side Injection-induced Buffer Overflow This type of attack exploits a buffer overflow vulnerability in targeted client software through injection of malicious content from a custom-built hostile service.
- Filter Failure through Buffer Overflow In this attack, the idea is to cause an active filter to fail by causing an oversized transaction. An attacker may try to feed overly long input strings to the program in an attempt to overwhelm the filter (by causing a buffer overflow) and hoping that the filter does not fail securely (i.e. the user input is let into the system unfiltered).
- MIME Conversion An attacker exploits a weakness in the MIME conversion routine to cause a buffer overflow and gain control over the mail server machine. The MIME system is designed to allow various different information formats to be interpreted and sent via e-mail. Attack points exist when data are converted to MIME compatible format and back.
Nessus
NASL family Debian Local Security Checks NASL id DEBIAN_DLA-1736.NASL description A security vulnerability was discovered in the Dovecot email server. When reading FTS headers from the Dovecot index, the input buffer size is not bounds-checked. An attacker with the ability to modify dovecot indexes, can take advantage of this flaw for privilege escalation or the execution of arbitrary code with the permissions of the dovecot user. Only installations using the FTS plugins are affected. For Debian 8 last seen 2020-06-01 modified 2020-06-02 plugin id 123523 published 2019-04-01 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/123523 title Debian DLA-1736-1 : dovecot security update code # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from Debian Security Advisory DLA-1736-1. The text # itself is copyright (C) Software in the Public Interest, Inc. # include("compat.inc"); if (description) { script_id(123523); script_version("1.2"); script_cvs_date("Date: 2020/01/27"); script_cve_id("CVE-2019-7524"); script_name(english:"Debian DLA-1736-1 : dovecot security update"); script_summary(english:"Checks dpkg output for the updated packages."); script_set_attribute( attribute:"synopsis", value:"The remote Debian host is missing a security update." ); script_set_attribute( attribute:"description", value: "A security vulnerability was discovered in the Dovecot email server. When reading FTS headers from the Dovecot index, the input buffer size is not bounds-checked. An attacker with the ability to modify dovecot indexes, can take advantage of this flaw for privilege escalation or the execution of arbitrary code with the permissions of the dovecot user. Only installations using the FTS plugins are affected. For Debian 8 'Jessie', this problem has been fixed in version 1:2.2.13-12~deb8u6. We recommend that you upgrade your dovecot packages. 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." ); script_set_attribute( attribute:"see_also", value:"https://lists.debian.org/debian-lts-announce/2019/03/msg00038.html" ); script_set_attribute( attribute:"see_also", value:"https://packages.debian.org/source/jessie/dovecot" ); script_set_attribute(attribute:"solution", value:"Upgrade the affected packages."); script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C"); script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C"); script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"); 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:debian:debian_linux:dovecot-core"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:dovecot-dbg"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:dovecot-dev"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:dovecot-gssapi"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:dovecot-imapd"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:dovecot-ldap"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:dovecot-lmtpd"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:dovecot-lucene"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:dovecot-managesieved"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:dovecot-mysql"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:dovecot-pgsql"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:dovecot-pop3d"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:dovecot-sieve"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:dovecot-solr"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:dovecot-sqlite"); script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:8.0"); script_set_attribute(attribute:"vuln_publication_date", value:"2019/03/28"); script_set_attribute(attribute:"patch_publication_date", value:"2019/03/29"); script_set_attribute(attribute:"plugin_publication_date", value:"2019/04/01"); script_set_attribute(attribute:"generated_plugin", value:"current"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_copyright(english:"This script is Copyright (C) 2019-2020 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:"8.0", prefix:"dovecot-core", reference:"1:2.2.13-12~deb8u6")) flag++; if (deb_check(release:"8.0", prefix:"dovecot-dbg", reference:"1:2.2.13-12~deb8u6")) flag++; if (deb_check(release:"8.0", prefix:"dovecot-dev", reference:"1:2.2.13-12~deb8u6")) flag++; if (deb_check(release:"8.0", prefix:"dovecot-gssapi", reference:"1:2.2.13-12~deb8u6")) flag++; if (deb_check(release:"8.0", prefix:"dovecot-imapd", reference:"1:2.2.13-12~deb8u6")) flag++; if (deb_check(release:"8.0", prefix:"dovecot-ldap", reference:"1:2.2.13-12~deb8u6")) flag++; if (deb_check(release:"8.0", prefix:"dovecot-lmtpd", reference:"1:2.2.13-12~deb8u6")) flag++; if (deb_check(release:"8.0", prefix:"dovecot-lucene", reference:"1:2.2.13-12~deb8u6")) flag++; if (deb_check(release:"8.0", prefix:"dovecot-managesieved", reference:"1:2.2.13-12~deb8u6")) flag++; if (deb_check(release:"8.0", prefix:"dovecot-mysql", reference:"1:2.2.13-12~deb8u6")) flag++; if (deb_check(release:"8.0", prefix:"dovecot-pgsql", reference:"1:2.2.13-12~deb8u6")) flag++; if (deb_check(release:"8.0", prefix:"dovecot-pop3d", reference:"1:2.2.13-12~deb8u6")) flag++; if (deb_check(release:"8.0", prefix:"dovecot-sieve", reference:"1:2.2.13-12~deb8u6")) flag++; if (deb_check(release:"8.0", prefix:"dovecot-solr", reference:"1:2.2.13-12~deb8u6")) flag++; if (deb_check(release:"8.0", prefix:"dovecot-sqlite", reference:"1:2.2.13-12~deb8u6")) flag++; if (flag) { if (report_verbosity > 0) security_hole(port:0, extra:deb_report_get()); else security_hole(0); exit(0); } else audit(AUDIT_HOST_NOT, "affected");NASL family SuSE Local Security Checks NASL id OPENSUSE-2019-1212.NASL description This update for dovecot23 fixes the following issue : Security issue fixed : - CVE-2019-7524: Fixed an improper file handling which could result in stack oveflow allowing local root escalation (bsc#1130116). This update was imported from the SUSE:SLE-15:Update update project. last seen 2020-06-01 modified 2020-06-02 plugin id 124105 published 2019-04-17 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/124105 title openSUSE Security Update : dovecot23 (openSUSE-2019-1212) code # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from openSUSE Security Update openSUSE-2019-1212. # # The text description of this plugin is (C) SUSE LLC. # include("compat.inc"); if (description) { script_id(124105); script_version("1.2"); script_cvs_date("Date: 2020/01/23"); script_cve_id("CVE-2019-7524"); script_name(english:"openSUSE Security Update : dovecot23 (openSUSE-2019-1212)"); script_summary(english:"Check for the openSUSE-2019-1212 patch"); script_set_attribute( attribute:"synopsis", value:"The remote openSUSE host is missing a security update." ); script_set_attribute( attribute:"description", value: "This update for dovecot23 fixes the following issue : Security issue fixed : - CVE-2019-7524: Fixed an improper file handling which could result in stack oveflow allowing local root escalation (bsc#1130116). This update was imported from the SUSE:SLE-15:Update update project." ); script_set_attribute( attribute:"see_also", value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1130116" ); script_set_attribute( attribute:"solution", value:"Update the affected dovecot23 packages." ); script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C"); script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C"); script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"); 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:novell:opensuse:dovecot23"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:dovecot23-backend-mysql"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:dovecot23-backend-mysql-debuginfo"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:dovecot23-backend-pgsql"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:dovecot23-backend-pgsql-debuginfo"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:dovecot23-backend-sqlite"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:dovecot23-backend-sqlite-debuginfo"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:dovecot23-debuginfo"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:dovecot23-debugsource"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:dovecot23-devel"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:dovecot23-fts"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:dovecot23-fts-debuginfo"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:dovecot23-fts-lucene"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:dovecot23-fts-lucene-debuginfo"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:dovecot23-fts-solr"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:dovecot23-fts-solr-debuginfo"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:dovecot23-fts-squat"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:dovecot23-fts-squat-debuginfo"); script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:opensuse:15.0"); script_set_attribute(attribute:"vuln_publication_date", value:"2019/03/28"); script_set_attribute(attribute:"patch_publication_date", value:"2019/04/16"); script_set_attribute(attribute:"plugin_publication_date", value:"2019/04/17"); script_set_attribute(attribute:"generated_plugin", value:"current"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_copyright(english:"This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof."); script_family(english:"SuSE Local Security Checks"); script_dependencies("ssh_get_info.nasl"); script_require_keys("Host/local_checks_enabled", "Host/SuSE/release", "Host/SuSE/rpm-list", "Host/cpu"); 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/SuSE/release"); if (isnull(release) || release =~ "^(SLED|SLES)") audit(AUDIT_OS_NOT, "openSUSE"); if (release !~ "^(SUSE15\.0)$") audit(AUDIT_OS_RELEASE_NOT, "openSUSE", "15.0", release); if (!get_kb_item("Host/SuSE/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING); ourarch = get_kb_item("Host/cpu"); if (!ourarch) audit(AUDIT_UNKNOWN_ARCH); if (ourarch !~ "^(x86_64)$") audit(AUDIT_ARCH_NOT, "x86_64", ourarch); flag = 0; if ( rpm_check(release:"SUSE15.0", reference:"dovecot23-2.3.3-lp150.8.2") ) flag++; if ( rpm_check(release:"SUSE15.0", reference:"dovecot23-backend-mysql-2.3.3-lp150.8.2") ) flag++; if ( rpm_check(release:"SUSE15.0", reference:"dovecot23-backend-mysql-debuginfo-2.3.3-lp150.8.2") ) flag++; if ( rpm_check(release:"SUSE15.0", reference:"dovecot23-backend-pgsql-2.3.3-lp150.8.2") ) flag++; if ( rpm_check(release:"SUSE15.0", reference:"dovecot23-backend-pgsql-debuginfo-2.3.3-lp150.8.2") ) flag++; if ( rpm_check(release:"SUSE15.0", reference:"dovecot23-backend-sqlite-2.3.3-lp150.8.2") ) flag++; if ( rpm_check(release:"SUSE15.0", reference:"dovecot23-backend-sqlite-debuginfo-2.3.3-lp150.8.2") ) flag++; if ( rpm_check(release:"SUSE15.0", reference:"dovecot23-debuginfo-2.3.3-lp150.8.2") ) flag++; if ( rpm_check(release:"SUSE15.0", reference:"dovecot23-debugsource-2.3.3-lp150.8.2") ) flag++; if ( rpm_check(release:"SUSE15.0", reference:"dovecot23-devel-2.3.3-lp150.8.2") ) flag++; if ( rpm_check(release:"SUSE15.0", reference:"dovecot23-fts-2.3.3-lp150.8.2") ) flag++; if ( rpm_check(release:"SUSE15.0", reference:"dovecot23-fts-debuginfo-2.3.3-lp150.8.2") ) flag++; if ( rpm_check(release:"SUSE15.0", reference:"dovecot23-fts-lucene-2.3.3-lp150.8.2") ) flag++; if ( rpm_check(release:"SUSE15.0", reference:"dovecot23-fts-lucene-debuginfo-2.3.3-lp150.8.2") ) flag++; if ( rpm_check(release:"SUSE15.0", reference:"dovecot23-fts-solr-2.3.3-lp150.8.2") ) flag++; if ( rpm_check(release:"SUSE15.0", reference:"dovecot23-fts-solr-debuginfo-2.3.3-lp150.8.2") ) flag++; if ( rpm_check(release:"SUSE15.0", reference:"dovecot23-fts-squat-2.3.3-lp150.8.2") ) flag++; if ( rpm_check(release:"SUSE15.0", reference:"dovecot23-fts-squat-debuginfo-2.3.3-lp150.8.2") ) flag++; if (flag) { if (report_verbosity > 0) security_hole(port:0, extra:rpm_report_get()); else security_hole(0); exit(0); } else { tested = pkg_tests_get(); if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested); else audit(AUDIT_PACKAGE_NOT_INSTALLED, "dovecot23 / dovecot23-backend-mysql / etc"); }NASL family Fedora Local Security Checks NASL id FEDORA_2019-9E004DECEA.NASL description dovecot updated to 2.3.6, includes several security fixes 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 125910 published 2019-06-14 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/125910 title Fedora 30 : 1:dovecot (2019-9e004decea) code # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from Fedora Security Advisory FEDORA-2019-9e004decea. # include("compat.inc"); if (description) { script_id(125910); script_version("1.3"); script_cvs_date("Date: 2020/01/10"); script_cve_id("CVE-2019-11494", "CVE-2019-11499", "CVE-2019-3814", "CVE-2019-7524"); script_xref(name:"FEDORA", value:"2019-9e004decea"); script_name(english:"Fedora 30 : 1:dovecot (2019-9e004decea)"); 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: "dovecot updated to 2.3.6, includes several security fixes 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-2019-9e004decea" ); script_set_attribute( attribute:"solution", value:"Update the affected 1:dovecot package." ); script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C"); script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C"); script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"); 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:1:dovecot"); script_set_attribute(attribute:"cpe", value:"cpe:/o:fedoraproject:fedora:30"); script_set_attribute(attribute:"vuln_publication_date", value:"2019/03/27"); script_set_attribute(attribute:"patch_publication_date", value:"2019/06/14"); script_set_attribute(attribute:"plugin_publication_date", value:"2019/06/14"); script_set_attribute(attribute:"generated_plugin", value:"current"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_copyright(english:"This script is Copyright (C) 2019-2020 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:"dovecot-2.3.6-3.fc30", epoch:"1")) flag++; if (flag) { security_report_v4( port : 0, severity : SECURITY_HOLE, 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"); }NASL family Huawei Local Security Checks NASL id EULEROS_SA-2019-1280.NASL description According to the versions of the dovecot packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : - It was discovered that Dovecot incorrectly handled client certificates. A remote attacker in possession of a valid certificate with an empty username field could possibly use this issue to impersonate other users.(CVE-2019-3814) - In Dovecot before 2.2.36.3 and 2.3.x before 2.3.5.1, a local attacker can cause a buffer overflow in the indexer-worker process, which can be used to elevate to root. This occurs because of missing checks in the fts and pop3-uidl components.(CVE-2019-7524) 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. last seen 2020-05-06 modified 2019-04-30 plugin id 124376 published 2019-04-30 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/124376 title EulerOS 2.0 SP5 : dovecot (EulerOS-SA-2019-1280) code # # (C) Tenable Network Security, Inc. # include("compat.inc"); if (description) { script_id(124376); script_version("1.4"); script_set_attribute(attribute:"plugin_modification_date", value:"2020/05/04"); script_cve_id( "CVE-2019-3814", "CVE-2019-7524" ); script_name(english:"EulerOS 2.0 SP5 : dovecot (EulerOS-SA-2019-1280)"); script_summary(english:"Checks the rpm output for the updated packages."); script_set_attribute(attribute:"synopsis", value: "The remote EulerOS host is missing multiple security updates."); script_set_attribute(attribute:"description", value: "According to the versions of the dovecot packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : - It was discovered that Dovecot incorrectly handled client certificates. A remote attacker in possession of a valid certificate with an empty username field could possibly use this issue to impersonate other users.(CVE-2019-3814) - In Dovecot before 2.2.36.3 and 2.3.x before 2.3.5.1, a local attacker can cause a buffer overflow in the indexer-worker process, which can be used to elevate to root. This occurs because of missing checks in the fts and pop3-uidl components.(CVE-2019-7524) 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."); # https://developer.huaweicloud.com/ict/en/site-euleros/euleros/security-advisories/EulerOS-SA-2019-1280 script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?ca21d234"); script_set_attribute(attribute:"solution", value: "Update the affected dovecot packages."); script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C"); script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C"); script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"); 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:"patch_publication_date", value:"2019/04/03"); script_set_attribute(attribute:"plugin_publication_date", value:"2019/04/30"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:dovecot"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:dovecot-mysql"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:dovecot-pgsql"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:dovecot-pigeonhole"); script_set_attribute(attribute:"cpe", value:"cpe:/o:huawei:euleros:2.0"); script_set_attribute(attribute:"generated_plugin", value:"current"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_family(english:"Huawei Local Security Checks"); script_copyright(english:"This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof."); script_dependencies("ssh_get_info.nasl"); script_require_keys("Host/local_checks_enabled", "Host/EulerOS/release", "Host/EulerOS/rpm-list", "Host/EulerOS/sp"); script_exclude_keys("Host/EulerOS/uvp_version"); 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/EulerOS/release"); if (isnull(release) || release !~ "^EulerOS") audit(AUDIT_OS_NOT, "EulerOS"); if (release !~ "^EulerOS release 2\.0(\D|$)") audit(AUDIT_OS_NOT, "EulerOS 2.0"); sp = get_kb_item("Host/EulerOS/sp"); if (isnull(sp) || sp !~ "^(5)$") audit(AUDIT_OS_NOT, "EulerOS 2.0 SP5"); uvp = get_kb_item("Host/EulerOS/uvp_version"); if (!empty_or_null(uvp)) audit(AUDIT_OS_NOT, "EulerOS 2.0 SP5", "EulerOS UVP " + uvp); if (!get_kb_item("Host/EulerOS/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$" && "aarch64" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "EulerOS", cpu); if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_ARCH_NOT, "i686 / x86_64", cpu); flag = 0; pkgs = ["dovecot-2.2.10-8.h4.eulerosv2r7", "dovecot-mysql-2.2.10-8.h4.eulerosv2r7", "dovecot-pgsql-2.2.10-8.h4.eulerosv2r7", "dovecot-pigeonhole-2.2.10-8.h4.eulerosv2r7"]; foreach (pkg in pkgs) if (rpm_check(release:"EulerOS-2.0", sp:"5", reference:pkg)) flag++; if (flag) { security_report_v4( port : 0, severity : SECURITY_HOLE, 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, "dovecot"); }NASL family Scientific Linux Local Security Checks NASL id SL_20200407_DOVECOT_ON_SL7_X.NASL description * dovecot: Improper certificate validation * dovecot: Buffer overflow in indexer-worker process results in privilege escalation last seen 2020-04-30 modified 2020-04-21 plugin id 135805 published 2020-04-21 reporter This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/135805 title Scientific Linux Security Update : dovecot on SL7.x x86_64 (20200407) NASL family CentOS Local Security Checks NASL id CENTOS_RHSA-2020-1062.NASL description The remote Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2020:1062 advisory. - dovecot: Improper certificate validation (CVE-2019-3814) - dovecot: Buffer overflow in indexer-worker process results in privilege escalation (CVE-2019-7524) Note that Nessus has not tested for this issue but has instead relied only on the application last seen 2020-06-06 modified 2020-04-10 plugin id 135329 published 2020-04-10 reporter This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/135329 title CentOS 7 : dovecot (CESA-2020:1062) NASL family SuSE Local Security Checks NASL id SUSE_SU-2019-0876-1.NASL description This update for dovecot23 fixes the following issue : Security issue fixed : CVE-2019-7524: Fixed an improper file handling which could result in stack oveflow allowing local root escalation (bsc#1130116). 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. last seen 2020-06-01 modified 2020-06-02 plugin id 123784 published 2019-04-05 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/123784 title SUSE SLES15 Security Update : dovecot23 (SUSE-SU-2019:0876-1) NASL family Red Hat Local Security Checks NASL id REDHAT-RHSA-2020-1062.NASL description The remote Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2020:1062 advisory. - dovecot: Improper certificate validation (CVE-2019-3814) - dovecot: Buffer overflow in indexer-worker process results in privilege escalation (CVE-2019-7524) Note that Nessus has not tested for this issue but has instead relied only on the application last seen 2020-04-23 modified 2020-03-31 plugin id 135038 published 2020-03-31 reporter This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/135038 title RHEL 7 : dovecot (RHSA-2020:1062) NASL family SuSE Local Security Checks NASL id SUSE_SU-2019-0900-1.NASL description This update for dovecot22 fixes the following issues : Security issues fixed : CVE-2019-7524: Fixed an improper file handling which could result in stack overflow allowing local root escalation (bsc#1130116). CVE-2019-3814: Fixed a vulnerability related to SSL client certificate authentication (bsc#1123022). Other issue fixed: Fixed handling of command continuation(bsc#1111789) 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. last seen 2020-06-01 modified 2020-06-02 plugin id 123926 published 2019-04-09 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/123926 title SUSE SLES12 Security Update : dovecot22 (SUSE-SU-2019:0900-1) NASL family FreeBSD Local Security Checks NASL id FREEBSD_PKG_7862213C515211E98B26A4BADB296695.NASL description Aki Tuomi reports : Vulnerability Details : When reading FTS or POP3-UIDL header from dovecot index, the input buffer size is not bound, and data is copied to target structure causing stack overflow. Risk : This can be used for local root privilege escalation or executing arbitrary code in dovecot process context. This requires ability to directly modify dovecot indexes. Steps to reproduce : Produce dovecot.index.log entry that creates an FTS header which has more than 12 bytes of data. Trigger dovecot indexer-worker or run doveadm index. Dovecot will crash. Mitigations : Since 2.3.0 dovecot has been compiled with stack smash protection, ASLR, read-only GOT tables and other techniques that make exploiting this bug much harder. last seen 2020-06-01 modified 2020-06-02 plugin id 123481 published 2019-03-29 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/123481 title FreeBSD : dovecot -- Buffer overflow reading extension header (7862213c-5152-11e9-8b26-a4badb296695) NASL family Gentoo Local Security Checks NASL id GENTOO_GLSA-201904-19.NASL description The remote host is affected by the vulnerability described in GLSA-201904-19 (Dovecot: Multiple vulnerabilities) Multiple vulnerabilities have been discovered in Dovecot. Please review the CVE identifiers referenced below for details. Impact : Please review the referenced CVE identifiers for details Workaround : There is no known workaround at this time. last seen 2020-06-01 modified 2020-06-02 plugin id 124132 published 2019-04-18 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/124132 title GLSA-201904-19 : Dovecot: Multiple vulnerabilities NASL family Huawei Local Security Checks NASL id EULEROS_SA-2019-1569.NASL description According to the versions of the dovecot packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : - It was discovered that Dovecot incorrectly handled client certificates. A remote attacker in possession of a valid certificate with an empty username field could possibly use this issue to impersonate other users.(CVE-2019-3814) - In Dovecot before 2.2.36.3 and 2.3.x before 2.3.5.1, a local attacker can cause a buffer overflow in the indexer-worker process, which can be used to elevate to root. This occurs because of missing checks in the fts and pop3-uidl components.(CVE-2019-7524) 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. last seen 2020-05-06 modified 2019-05-29 plugin id 125496 published 2019-05-29 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/125496 title EulerOS 2.0 SP3 : dovecot (EulerOS-SA-2019-1569) NASL family Ubuntu Local Security Checks NASL id UBUNTU_USN-3928-1.NASL description It was discovered that Dovecot incorrectly handled reading certain headers from the index. A local attacker could possibly use this issue to escalate privileges. Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. 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 123641 published 2019-04-02 reporter Ubuntu Security Notice (C) 2019-2020 Canonical, Inc. / NASL script (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/123641 title Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS / 18.10 : dovecot vulnerability (USN-3928-1) NASL family Huawei Local Security Checks NASL id EULEROS_SA-2019-1644.NASL description According to the versions of the dovecot packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : - In Dovecot before 2.2.36.3 and 2.3.x before 2.3.5.1, a local attacker can cause a buffer overflow in the indexer-worker process, which can be used to elevate to root. This occurs because of missing checks in the fts and pop3-uidl components.(CVE-2019-7524) - The JSON encoder in Dovecot before 2.3.5.2 allows attackers to repeatedly crash the authentication service by attempting to authenticate with an invalid UTF-8 sequence as the username.(CVE-2019-10691) 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. last seen 2020-05-03 modified 2019-06-27 plugin id 126271 published 2019-06-27 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/126271 title EulerOS 2.0 SP8 : dovecot (EulerOS-SA-2019-1644) NASL family Debian Local Security Checks NASL id DEBIAN_DSA-4418.NASL description A vulnerability was discovered in the Dovecot email server. When reading FTS or POP3-UIDL headers from the Dovecot index, the input buffer size is not bounds-checked. An attacker with the ability to modify dovecot indexes, can take advantage of this flaw for privilege escalation or the execution of arbitrary code with the permissions of the dovecot user. Only installations using the FTS or pop3 migration plugins are affected. last seen 2020-06-01 modified 2020-06-02 plugin id 123530 published 2019-04-01 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/123530 title Debian DSA-4418-1 : dovecot - security update NASL family SuSE Local Security Checks NASL id OPENSUSE-2019-1220.NASL description This update for dovecot22 fixes the following issues : Security issues fixed : - CVE-2019-7524: Fixed an improper file handling which could result in stack overflow allowing local root escalation (bsc#1130116). - CVE-2019-3814: Fixed a vulnerability related to SSL client certificate authentication (bsc#1123022). Other issue fixed : - Fixed handling of command continuation (bsc#1111789). This update was imported from the SUSE:SLE-12:Update update project. last seen 2020-06-01 modified 2020-06-02 plugin id 124142 published 2019-04-18 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/124142 title openSUSE Security Update : dovecot22 (openSUSE-2019-1220) NASL family Amazon Linux Local Security Checks NASL id ALA_ALAS-2020-1363.NASL description In Dovecot before 2.2.36.3 and 2.3.x before 2.3.5.1, a local attacker can cause a buffer overflow in the indexer-worker process, which can be used to elevate to root. This occurs because of missing checks in the fts and pop3-uidl components. (CVE-2019-7524) It was discovered that Dovecot before versions 2.2.36.1 and 2.3.4.1 incorrectly handled client certificates. A remote attacker in possession of a valid certificate with an empty username field could possibly use this issue to impersonate other users. (CVE-2019-3814) last seen 2020-05-21 modified 2020-05-15 plugin id 136624 published 2020-05-15 reporter This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/136624 title Amazon Linux AMI : dovecot (ALAS-2020-1363) NASL family Huawei Local Security Checks NASL id EULEROS_SA-2019-1279.NASL description According to the versions of the dovecot packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : - It was discovered that Dovecot incorrectly handled client certificates. A remote attacker in possession of a valid certificate with an empty username field could possibly use this issue to impersonate other users.(CVE-2019-3814) - In Dovecot before 2.2.36.3 and 2.3.x before 2.3.5.1, a local attacker can cause a buffer overflow in the indexer-worker process, which can be used to elevate to root. This occurs because of missing checks in the fts and pop3-uidl components.(CVE-2019-7524) 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. last seen 2020-05-06 modified 2019-04-30 plugin id 124375 published 2019-04-30 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/124375 title EulerOS 2.0 SP2 : dovecot (EulerOS-SA-2019-1279)
Redhat
| advisories |
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| rpms |
|
References
- https://dovecot.org/security.html
- https://dovecot.org/list/dovecot-news/2019-March/000403.html
- http://www.openwall.com/lists/oss-security/2019/03/28/1
- https://seclists.org/bugtraq/2019/Mar/59
- https://www.debian.org/security/2019/dsa-4418
- https://lists.debian.org/debian-lts-announce/2019/03/msg00038.html
- https://usn.ubuntu.com/3928-1/
- http://www.securityfocus.com/bid/107672
- http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00060.html
- http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00067.html
- https://security.gentoo.org/glsa/201904-19
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4XLI55NGRDTGMVOPYFCPPFNPA5VKYSSY/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QHFZ5OWRIZGIWZJ5PTNVWWZNLLNH4XYS/