Vulnerabilities > CVE-2014-2038 - Information Exposure vulnerability in multiple products
Attack vector
UNKNOWN Attack complexity
UNKNOWN Privileges required
UNKNOWN Confidentiality impact
UNKNOWN Integrity impact
UNKNOWN Availability impact
UNKNOWN Summary
The nfs_can_extend_write function in fs/nfs/write.c in the Linux kernel before 3.13.3 relies on a write delegation to extend a write operation without a certain up-to-date verification, which allows local users to obtain sensitive information from kernel memory in opportunistic circumstances by writing to a file in an NFS filesystem and then reading the same file.
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 Oracle Linux Local Security Checks NASL id ORACLELINUX_ELSA-2014-0328.NASL description From Red Hat Security Advisory 2014:0328 : Updated kernel packages that fix multiple security issues and several bugs are now available for Red Hat Enterprise Linux 6. The Red Hat Security Response Team has rated this update as having Important security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section. The kernel packages contain the Linux kernel, the core of any Linux operating system. * A flaw was found in the way the get_rx_bufs() function in the vhost_net implementation in the Linux kernel handled error conditions reported by the vhost_get_vq_desc() function. A privileged guest user could use this flaw to crash the host. (CVE-2014-0055, Important) * A flaw was found in the way the Linux kernel processed an authenticated COOKIE_ECHO chunk during the initialization of an SCTP connection. A remote attacker could use this flaw to crash the system by initiating a specially crafted SCTP handshake in order to trigger a NULL pointer dereference on the system. (CVE-2014-0101, Important) * A flaw was found in the way the Linux kernel last seen 2020-06-01 modified 2020-06-02 plugin id 73196 published 2014-03-26 reporter This script is Copyright (C) 2014-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/73196 title Oracle Linux 6 : kernel (ELSA-2014-0328) code # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from Red Hat Security Advisory RHSA-2014:0328 and # Oracle Linux Security Advisory ELSA-2014-0328 respectively. # include("compat.inc"); if (description) { script_id(73196); script_version("1.9"); script_cvs_date("Date: 2019/09/30 10:58:19"); script_cve_id("CVE-2013-1860", "CVE-2013-7266", "CVE-2013-7270", "CVE-2014-0055", "CVE-2014-0069", "CVE-2014-0101", "CVE-2014-2038"); script_bugtraq_id(58510, 65588, 65943); script_xref(name:"RHSA", value:"2014:0328"); script_name(english:"Oracle Linux 6 : kernel (ELSA-2014-0328)"); script_summary(english:"Checks rpm output for the updated packages"); script_set_attribute( attribute:"synopsis", value:"The remote Oracle Linux host is missing one or more security updates." ); script_set_attribute( attribute:"description", value: "From Red Hat Security Advisory 2014:0328 : Updated kernel packages that fix multiple security issues and several bugs are now available for Red Hat Enterprise Linux 6. The Red Hat Security Response Team has rated this update as having Important security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section. The kernel packages contain the Linux kernel, the core of any Linux operating system. * A flaw was found in the way the get_rx_bufs() function in the vhost_net implementation in the Linux kernel handled error conditions reported by the vhost_get_vq_desc() function. A privileged guest user could use this flaw to crash the host. (CVE-2014-0055, Important) * A flaw was found in the way the Linux kernel processed an authenticated COOKIE_ECHO chunk during the initialization of an SCTP connection. A remote attacker could use this flaw to crash the system by initiating a specially crafted SCTP handshake in order to trigger a NULL pointer dereference on the system. (CVE-2014-0101, Important) * A flaw was found in the way the Linux kernel's CIFS implementation handled uncached write operations with specially crafted iovec structures. An unprivileged local user with access to a CIFS share could use this flaw to crash the system, leak kernel memory, or, potentially, escalate their privileges on the system. Note: the default cache settings for CIFS mounts on Red Hat Enterprise Linux 6 prohibit a successful exploitation of this issue. (CVE-2014-0069, Moderate) * A heap-based buffer overflow flaw was found in the Linux kernel's cdc-wdm driver, used for USB CDC WCM device management. An attacker with physical access to a system could use this flaw to cause a denial of service or, potentially, escalate their privileges. (CVE-2013-1860, Low) Red Hat would like to thank Nokia Siemens Networks for reporting CVE-2014-0101, and Al Viro for reporting CVE-2014-0069. This update also fixes several bugs. Documentation for these changes will be available shortly from the Technical Notes document linked to in the References section. All kernel users are advised to upgrade to these updated packages, which contain backported patches to correct these issues. The system must be rebooted for this update to take effect." ); script_set_attribute( attribute:"see_also", value:"https://oss.oracle.com/pipermail/el-errata/2014-March/004037.html" ); script_set_attribute( attribute:"solution", value:"Update the affected kernel packages." ); script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:N/I:N/A:C"); script_set_cvss_temporal_vector("CVSS2#E:ND/RL:OF/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:oracle:linux:kernel"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-abi-whitelists"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-debug"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-debug-devel"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-devel"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-doc"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-firmware"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-headers"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:perf"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:python-perf"); script_set_attribute(attribute:"cpe", value:"cpe:/o:oracle:linux:6"); script_set_attribute(attribute:"vuln_publication_date", value:"2013/03/22"); script_set_attribute(attribute:"patch_publication_date", value:"2014/03/25"); script_set_attribute(attribute:"plugin_publication_date", value:"2014/03/26"); script_set_attribute(attribute:"generated_plugin", value:"current"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_copyright(english:"This script is Copyright (C) 2014-2019 and is owned by Tenable, Inc. or an Affiliate thereof."); script_family(english:"Oracle Linux Local Security Checks"); script_dependencies("ssh_get_info.nasl", "linux_alt_patch_detect.nasl"); script_require_keys("Host/local_checks_enabled", "Host/OracleLinux", "Host/RedHat/release", "Host/RedHat/rpm-list"); exit(0); } include("audit.inc"); include("global_settings.inc"); include("rpm.inc"); include("ksplice.inc"); if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED); if (!get_kb_item("Host/OracleLinux")) audit(AUDIT_OS_NOT, "Oracle Linux"); release = get_kb_item("Host/RedHat/release"); if (isnull(release) || !pregmatch(pattern: "Oracle (?:Linux Server|Enterprise Linux)", string:release)) audit(AUDIT_OS_NOT, "Oracle Linux"); os_ver = pregmatch(pattern: "Oracle (?:Linux Server|Enterprise Linux) .*release ([0-9]+(\.[0-9]+)?)", string:release); if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Oracle Linux"); os_ver = os_ver[1]; if (! preg(pattern:"^6([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Oracle Linux 6", "Oracle Linux " + os_ver); if (!get_kb_item("Host/RedHat/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING); cpu = get_kb_item("Host/cpu"); if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH); if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Oracle Linux", cpu); if (get_one_kb_item("Host/ksplice/kernel-cves")) { rm_kb_item(name:"Host/uptrack-uname-r"); cve_list = make_list("CVE-2013-1860", "CVE-2013-7266", "CVE-2013-7270", "CVE-2014-0055", "CVE-2014-0069", "CVE-2014-0101", "CVE-2014-2038"); if (ksplice_cves_check(cve_list)) { audit(AUDIT_PATCH_INSTALLED, "KSplice hotfix for ELSA-2014-0328"); } else { __rpm_report = ksplice_reporting_text(); } } kernel_major_minor = get_kb_item("Host/uname/major_minor"); if (empty_or_null(kernel_major_minor)) exit(1, "Unable to determine kernel major-minor level."); expected_kernel_major_minor = "2.6"; if (kernel_major_minor != expected_kernel_major_minor) audit(AUDIT_OS_NOT, "running kernel level " + expected_kernel_major_minor + ", it is running kernel level " + kernel_major_minor); flag = 0; if (rpm_exists(release:"EL6", rpm:"kernel-2.6.32") && rpm_check(release:"EL6", reference:"kernel-2.6.32-431.11.2.el6")) flag++; if (rpm_exists(release:"EL6", rpm:"kernel-abi-whitelists-2.6.32") && rpm_check(release:"EL6", reference:"kernel-abi-whitelists-2.6.32-431.11.2.el6")) flag++; if (rpm_exists(release:"EL6", rpm:"kernel-debug-2.6.32") && rpm_check(release:"EL6", reference:"kernel-debug-2.6.32-431.11.2.el6")) flag++; if (rpm_exists(release:"EL6", rpm:"kernel-debug-devel-2.6.32") && rpm_check(release:"EL6", reference:"kernel-debug-devel-2.6.32-431.11.2.el6")) flag++; if (rpm_exists(release:"EL6", rpm:"kernel-devel-2.6.32") && rpm_check(release:"EL6", reference:"kernel-devel-2.6.32-431.11.2.el6")) flag++; if (rpm_exists(release:"EL6", rpm:"kernel-doc-2.6.32") && rpm_check(release:"EL6", reference:"kernel-doc-2.6.32-431.11.2.el6")) flag++; if (rpm_exists(release:"EL6", rpm:"kernel-firmware-2.6.32") && rpm_check(release:"EL6", reference:"kernel-firmware-2.6.32-431.11.2.el6")) flag++; if (rpm_exists(release:"EL6", rpm:"kernel-headers-2.6.32") && rpm_check(release:"EL6", reference:"kernel-headers-2.6.32-431.11.2.el6")) flag++; if (rpm_check(release:"EL6", reference:"perf-2.6.32-431.11.2.el6")) flag++; if (rpm_check(release:"EL6", reference:"python-perf-2.6.32-431.11.2.el6")) 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, "affected kernel"); }
NASL family Ubuntu Local Security Checks NASL id UBUNTU_USN-2140-1.NASL description An information leak was discovered in the Linux kernel when built with the NetFilter Connection Tracking (NF_CONNTRACK) support for IRC protocol (NF_NAT_IRC). A remote attacker could exploit this flaw to obtain potentially sensitive kernel information when communicating over a client- to-client IRC connection(/dcc) via a NAT-ed network. (CVE-2014-1690) Matthew Thode reported a denial of service vulnerability in the Linux kernel when SELinux support is enabled. A local user with the CAP_MAC_ADMIN capability (and the SELinux mac_admin permission if running in enforcing mode) could exploit this flaw to cause a denial of service (kernel crash). (CVE-2014-1874) An information leak was discovered in the Linux kernel last seen 2020-03-18 modified 2014-03-10 plugin id 72902 published 2014-03-10 reporter Ubuntu Security Notice (C) 2014-2020 Canonical, Inc. / NASL script (C) 2014-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/72902 title Ubuntu 13.10 : linux vulnerabilities (USN-2140-1) NASL family Huawei Local Security Checks NASL id EULEROS_SA-2019-1479.NASL description According to the versions of the kernel packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities : - The n_tty_write function in drivers/tty/n_tty.c in the Linux kernel through 3.14.3 does not properly manage tty driver access in the last seen 2020-03-19 modified 2019-05-13 plugin id 124803 published 2019-05-13 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/124803 title EulerOS Virtualization 3.0.1.0 : kernel (EulerOS-SA-2019-1479) NASL family Huawei Local Security Checks NASL id EULEROS_SA-2019-1528.NASL description According to the versions of the kernel packages installed, the EulerOS Virtualization for ARM 64 installation on the remote host is affected by the following vulnerabilities : - An out-of-bounds memory access flaw was found in the Linux kernel last seen 2020-03-17 modified 2019-05-14 plugin id 124981 published 2019-05-14 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/124981 title EulerOS Virtualization for ARM 64 3.0.1.0 : kernel (EulerOS-SA-2019-1528) NASL family Red Hat Local Security Checks NASL id REDHAT-RHSA-2014-0328.NASL description Updated kernel packages that fix multiple security issues and several bugs are now available for Red Hat Enterprise Linux 6. The Red Hat Security Response Team has rated this update as having Important security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section. The kernel packages contain the Linux kernel, the core of any Linux operating system. * A flaw was found in the way the get_rx_bufs() function in the vhost_net implementation in the Linux kernel handled error conditions reported by the vhost_get_vq_desc() function. A privileged guest user could use this flaw to crash the host. (CVE-2014-0055, Important) * A flaw was found in the way the Linux kernel processed an authenticated COOKIE_ECHO chunk during the initialization of an SCTP connection. A remote attacker could use this flaw to crash the system by initiating a specially crafted SCTP handshake in order to trigger a NULL pointer dereference on the system. (CVE-2014-0101, Important) * A flaw was found in the way the Linux kernel last seen 2020-06-01 modified 2020-06-02 plugin id 73198 published 2014-03-26 reporter This script is Copyright (C) 2014-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/73198 title RHEL 6 : kernel (RHSA-2014:0328) NASL family Ubuntu Local Security Checks NASL id UBUNTU_USN-2137-1.NASL description An information leak was discovered in the Linux kernel when built with the NetFilter Connection Tracking (NF_CONNTRACK) support for IRC protocol (NF_NAT_IRC). A remote attacker could exploit this flaw to obtain potentially sensitive kernel information when communicating over a client- to-client IRC connection(/dcc) via a NAT-ed network. (CVE-2014-1690) Matthew Thode reported a denial of service vulnerability in the Linux kernel when SELinux support is enabled. A local user with the CAP_MAC_ADMIN capability (and the SELinux mac_admin permission if running in enforcing mode) could exploit this flaw to cause a denial of service (kernel crash). (CVE-2014-1874) An information leak was discovered in the Linux kernel last seen 2020-03-18 modified 2014-03-10 plugin id 72900 published 2014-03-10 reporter Ubuntu Security Notice (C) 2014-2020 Canonical, Inc. / NASL script (C) 2014-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/72900 title Ubuntu 12.04 LTS : linux-lts-saucy vulnerabilities (USN-2137-1) NASL family CentOS Local Security Checks NASL id CENTOS_RHSA-2014-0328.NASL description Updated kernel packages that fix multiple security issues and several bugs are now available for Red Hat Enterprise Linux 6. The Red Hat Security Response Team has rated this update as having Important security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section. The kernel packages contain the Linux kernel, the core of any Linux operating system. * A flaw was found in the way the get_rx_bufs() function in the vhost_net implementation in the Linux kernel handled error conditions reported by the vhost_get_vq_desc() function. A privileged guest user could use this flaw to crash the host. (CVE-2014-0055, Important) * A flaw was found in the way the Linux kernel processed an authenticated COOKIE_ECHO chunk during the initialization of an SCTP connection. A remote attacker could use this flaw to crash the system by initiating a specially crafted SCTP handshake in order to trigger a NULL pointer dereference on the system. (CVE-2014-0101, Important) * A flaw was found in the way the Linux kernel last seen 2020-06-01 modified 2020-06-02 plugin id 73191 published 2014-03-26 reporter This script is Copyright (C) 2014-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/73191 title CentOS 6 : kernel (CESA-2014:0328)
Redhat
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References
- https://github.com/torvalds/linux/commit/263b4509ec4d47e0da3e753f85a39ea12d1eff24
- https://bugzilla.redhat.com/show_bug.cgi?id=1066939
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.13.3
- http://www.openwall.com/lists/oss-security/2014/02/20/16
- http://www.ubuntu.com/usn/USN-2137-1
- http://www.ubuntu.com/usn/USN-2140-1
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=263b4509ec4d47e0da3e753f85a39ea12d1eff24