Vulnerabilities > CVE-2017-17476 - Information Exposure vulnerability in multiple products
Attack vector
NETWORK Attack complexity
LOW Privileges required
NONE Confidentiality impact
HIGH Integrity impact
HIGH Availability impact
HIGH Summary
Open Ticket Request System (OTRS) 4.0.x before 4.0.28, 5.0.x before 5.0.26, and 6.0.x before 6.0.3, when cookie support is disabled, might allow remote attackers to hijack web sessions and consequently gain privileges via a crafted email.
Vulnerable Configurations
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- Subverting Environment Variable Values The attacker directly or indirectly modifies environment variables used by or controlling the target software. The attacker's goal is to cause the target software to deviate from its expected operation in a manner that benefits the attacker.
- Footprinting An attacker engages in probing and exploration activity to identify constituents and properties of the target. Footprinting is a general term to describe a variety of information gathering techniques, often used by attackers in preparation for some attack. It consists of using tools to learn as much as possible about the composition, configuration, and security mechanisms of the targeted application, system or network. Information that might be collected during a footprinting effort could include open ports, applications and their versions, network topology, and similar information. While footprinting is not intended to be damaging (although certain activities, such as network scans, can sometimes cause disruptions to vulnerable applications inadvertently) it may often pave the way for more damaging attacks.
- Exploiting Trust in Client (aka Make the Client Invisible) An attack of this type exploits a programs' vulnerabilities in client/server communication channel authentication and data integrity. It leverages the implicit trust a server places in the client, or more importantly, that which the server believes is the client. An attacker executes this type of attack by placing themselves in the communication channel between client and server such that communication directly to the server is possible where the server believes it is communicating only with a valid client. There are numerous variations of this type of attack.
- Browser Fingerprinting An attacker carefully crafts small snippets of Java Script to efficiently detect the type of browser the potential victim is using. Many web-based attacks need prior knowledge of the web browser including the version of browser to ensure successful exploitation of a vulnerability. Having this knowledge allows an attacker to target the victim with attacks that specifically exploit known or zero day weaknesses in the type and version of the browser used by the victim. Automating this process via Java Script as a part of the same delivery system used to exploit the browser is considered more efficient as the attacker can supply a browser fingerprinting method and integrate it with exploit code, all contained in Java Script and in response to the same web page request by the browser.
- Session Credential Falsification through Prediction This attack targets predictable session ID in order to gain privileges. The attacker can predict the session ID used during a transaction to perform spoofing and session hijacking.
Nessus
NASL family Debian Local Security Checks NASL id DEBIAN_DLA-1215.NASL description Francesco Sirocco discovered a flaw in otrs2, the Open Ticket Request System, which could result in session information disclosure when cookie support is disabled. A remote attacker can take advantage of this flaw to take over an agent last seen 2020-03-17 modified 2017-12-21 plugin id 105396 published 2017-12-21 reporter This script is Copyright (C) 2017-2020 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/105396 title Debian DLA-1215-1 : otrs2 security update code #%NASL_MIN_LEVEL 80502 # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from Debian Security Advisory DLA-1215-1. The text # itself is copyright (C) Software in the Public Interest, Inc. # include("compat.inc"); if (description) { script_id(105396); script_version("3.6"); script_set_attribute(attribute:"plugin_modification_date", value:"2020/03/12"); script_cve_id("CVE-2017-17476"); script_name(english:"Debian DLA-1215-1 : otrs2 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: "Francesco Sirocco discovered a flaw in otrs2, the Open Ticket Request System, which could result in session information disclosure when cookie support is disabled. A remote attacker can take advantage of this flaw to take over an agent's session if the agent is tricked into clicking a link in a specially crafted mail. For Debian 7 'Wheezy', these problems have been fixed in version 3.3.18-1~deb7u3. We recommend that you upgrade your otrs2 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/2017/12/msg00018.html" ); script_set_attribute( attribute:"see_also", value:"https://packages.debian.org/source/wheezy/otrs2" ); script_set_attribute( attribute:"solution", value:"Upgrade the affected otrs, and otrs2 packages." ); script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P"); 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:N/UI:R/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:"exploit_available", value:"false"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:otrs"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:otrs2"); script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:7.0"); script_set_attribute(attribute:"patch_publication_date", value:"2017/12/20"); script_set_attribute(attribute:"plugin_publication_date", value:"2017/12/21"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_copyright(english:"This script is Copyright (C) 2017-2020 Tenable Network Security, Inc."); 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:"7.0", prefix:"otrs", reference:"3.3.18-1~deb7u3")) flag++; if (deb_check(release:"7.0", prefix:"otrs2", reference:"3.3.18-1~deb7u3")) flag++; if (flag) { if (report_verbosity > 0) security_warning(port:0, extra:deb_report_get()); else security_warning(0); exit(0); } else audit(AUDIT_HOST_NOT, "affected");
NASL family Debian Local Security Checks NASL id DEBIAN_DSA-4069.NASL description Francesco Sirocco discovered a flaw in otrs2, the Open Ticket Request System, which could result in session information disclosure when cookie support is disabled. A remote attacker can take advantage of this flaw to take over an agent last seen 2020-06-01 modified 2020-06-02 plugin id 105397 published 2017-12-21 reporter This script is Copyright (C) 2017-2018 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/105397 title Debian DSA-4069-1 : otrs2 - security update code # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from Debian Security Advisory DSA-4069. The text # itself is copyright (C) Software in the Public Interest, Inc. # include("compat.inc"); if (description) { script_id(105397); script_version("3.5"); script_cvs_date("Date: 2018/11/13 12:30:46"); script_cve_id("CVE-2017-17476"); script_xref(name:"DSA", value:"4069"); script_name(english:"Debian DSA-4069-1 : otrs2 - 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: "Francesco Sirocco discovered a flaw in otrs2, the Open Ticket Request System, which could result in session information disclosure when cookie support is disabled. A remote attacker can take advantage of this flaw to take over an agent's session if the agent is tricked into clicking a link in a specially crafted mail." ); script_set_attribute( attribute:"see_also", value:"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=884801" ); script_set_attribute( attribute:"see_also", value:"https://security-tracker.debian.org/tracker/source-package/otrs2" ); script_set_attribute( attribute:"see_also", value:"https://packages.debian.org/source/jessie/otrs2" ); script_set_attribute( attribute:"see_also", value:"https://packages.debian.org/source/stretch/otrs2" ); script_set_attribute( attribute:"see_also", value:"https://www.debian.org/security/2017/dsa-4069" ); script_set_attribute( attribute:"solution", value: "Upgrade the otrs2 packages. For the oldstable distribution (jessie), this problem has been fixed in version 3.3.18-1+deb8u4. For the stable distribution (stretch), this problem has been fixed in version 5.0.16-1+deb9u5." ); script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P"); script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:otrs2"); script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:8.0"); script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:9.0"); script_set_attribute(attribute:"patch_publication_date", value:"2017/12/20"); script_set_attribute(attribute:"plugin_publication_date", value:"2017/12/21"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_copyright(english:"This script is Copyright (C) 2017-2018 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:"otrs", reference:"3.3.18-1+deb8u4")) flag++; if (deb_check(release:"8.0", prefix:"otrs2", reference:"3.3.18-1+deb8u4")) flag++; if (deb_check(release:"9.0", prefix:"otrs", reference:"5.0.16-1+deb9u5")) flag++; if (deb_check(release:"9.0", prefix:"otrs2", reference:"5.0.16-1+deb9u5")) flag++; if (flag) { if (report_verbosity > 0) security_warning(port:0, extra:deb_report_get()); else security_warning(0); exit(0); } else audit(AUDIT_HOST_NOT, "affected");
References
- https://github.com/OTRS/otrs/commit/26707eaaa791648e6c7ad6aeaa27efd70e7c66eb
- https://github.com/OTRS/otrs/commit/26707eaaa791648e6c7ad6aeaa27efd70e7c66eb
- https://github.com/OTRS/otrs/commit/36e3be99cfe8a9e09afa1b75fdc39f3e28f561fc
- https://github.com/OTRS/otrs/commit/36e3be99cfe8a9e09afa1b75fdc39f3e28f561fc
- https://github.com/OTRS/otrs/commit/720c73fbf53e476ca7dfdf2ae1d4d3d2aad2b953
- https://github.com/OTRS/otrs/commit/720c73fbf53e476ca7dfdf2ae1d4d3d2aad2b953
- https://lists.debian.org/debian-lts-announce/2017/12/msg00018.html
- https://lists.debian.org/debian-lts-announce/2017/12/msg00018.html
- https://www.debian.org/security/2017/dsa-4069
- https://www.debian.org/security/2017/dsa-4069
- https://www.otrs.com/security-advisory-2017-10-security-update-otrs-framework/
- https://www.otrs.com/security-advisory-2017-10-security-update-otrs-framework/