Vulnerabilities > CVE-2020-10936 - Improper Privilege Management vulnerability in multiple products
Attack vector
LOCAL Attack complexity
LOW Privileges required
LOW Confidentiality impact
HIGH Integrity impact
HIGH Availability impact
HIGH Summary
Sympa before 6.2.56 allows privilege escalation.
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_2020-D767D9077B.NASL description Update to sympa 6.2.56. Fixes CVE-2020-10936. For details, see : - https://github.com/sympa-community/sympa/releases/tag/6.2.56 - https://sympa-community.github.io/security/2020-002.html 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 2020-06-11 modified 2020-06-08 plugin id 137214 published 2020-06-08 reporter This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/137214 title Fedora 32 : sympa (2020-d767d9077b) code # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from Fedora Security Advisory FEDORA-2020-d767d9077b. # include("compat.inc"); if (description) { script_id(137214); script_version("1.2"); script_set_attribute(attribute:"plugin_modification_date", value:"2020/06/10"); script_cve_id("CVE-2020-10936"); script_xref(name:"FEDORA", value:"2020-d767d9077b"); script_name(english:"Fedora 32 : sympa (2020-d767d9077b)"); 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 sympa 6.2.56. Fixes CVE-2020-10936. For details, see : - https://github.com/sympa-community/sympa/releases/tag/6.2.56 - https://sympa-community.github.io/security/2020-002.html 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-d767d9077b" ); script_set_attribute( attribute:"see_also", value:"https://sympa-community.github.io/security/2020-002.html" ); script_set_attribute(attribute:"solution", value:"Update the affected sympa 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:sympa"); script_set_attribute(attribute:"cpe", value:"cpe:/o:fedoraproject:fedora:32"); script_set_attribute(attribute:"vuln_publication_date", value:"2020/05/27"); script_set_attribute(attribute:"patch_publication_date", value:"2020/06/07"); script_set_attribute(attribute:"plugin_publication_date", value:"2020/06/08"); 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:"^32([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Fedora 32", "Fedora " + os_ver); if (!get_kb_item("Host/RedHat/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING); cpu = get_kb_item("Host/cpu"); if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH); if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Fedora", cpu); flag = 0; if (rpm_check(release:"FC32", reference:"sympa-6.2.56-1.fc32")) 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, "sympa"); }
NASL family Fedora Local Security Checks NASL id FEDORA_2020-9B6C969AAC.NASL description Update to sympa 6.2.56. Fixes CVE-2020-10936. For details, see : - https://github.com/sympa-community/sympa/releases/tag/6.2.56 - https://sympa-community.github.io/security/2020-002.html 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 2020-06-06 modified 2020-06-02 plugin id 137011 published 2020-06-02 reporter This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/137011 title Fedora 31 : sympa (2020-9b6c969aac)
References
- https://sysdream.com/news/lab/
- https://github.com/sympa-community/sympa/releases
- https://sysdream.com/news/lab/2020-05-25-cve-2020-10936-sympa-privileges-escalation-to-root/
- https://usn.ubuntu.com/4442-1/
- https://lists.debian.org/debian-lts-announce/2020/10/msg00012.html
- https://www.debian.org/security/2020/dsa-4818
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3J4NZLGAF4ZYK52XEBQDTBNHLGBEPXXN/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/P3TMQ3CORUOWARALACCBG2SBTIGZ5GY5/