ID CVE-2014-3676
Summary Heap-based buffer overflow in Shim allows remote attackers to execute arbitrary code via a crafted IPv6 address, related to the "tftp:// DHCPv6 boot option."
References
Vulnerable Configurations
  • cpe:2.3:a:shim:shim
    cpe:2.3:a:shim:shim
CVSS
Base: 7.5 (as of 23-10-2014 - 09:08)
Impact:
Exploitability:
CWE CWE-119
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.
  • Overflow Binary Resource File
    An attack of this type exploits a buffer overflow vulnerability in the handling of binary resources. Binary resources may include music files like MP3, image files like JPEG files, and any other binary file. These attacks may pass unnoticed to the client machine through normal usage of files, such as a browser loading a seemingly innocent JPEG file. This can allow the attacker access to the execution stack and execute arbitrary code in the target process. This attack pattern is a variant of standard buffer overflow attacks using an unexpected vector (binary files) to wrap its attack and open up a new attack vector. The attacker is required to either directly serve the binary content to the victim, or place it in a locale like a MP3 sharing application, for the victim to download. The attacker then is notified upon the download or otherwise locates the vulnerability opened up by the buffer overflow.
  • Buffer Overflow via Symbolic Links
    This type of attack leverages the use of symbolic links to cause buffer overflows. An attacker can try to create or manipulate a symbolic link file such that its contents result in out of bounds data. When the target software processes the symbolic link file, it could potentially overflow internal buffers with insufficient bounds checking.
  • Overflow Variables and Tags
    This type of attack leverages the use of tags or variables from a formatted configuration data to cause buffer overflow. The attacker crafts a malicious HTML page or configuration file that includes oversized strings, thus causing an overflow.
  • Buffer Overflow via Parameter Expansion
    In this attack, the target software is given input that the attacker knows will be modified and expanded in size during processing. This attack relies on the target software failing to anticipate that the expanded data may exceed some internal limit, thereby creating a buffer overflow.
  • Buffer Overflow in an API Call
    This attack targets libraries or shared code modules which are vulnerable to buffer overflow attacks. An attacker who has access to an API may try to embed malicious code in the API function call and exploit a buffer overflow vulnerability in the function's implementation. All clients that make use of the code library thus become vulnerable by association. This has a very broad effect on security across a system, usually affecting more than one software process.
  • Buffer Overflow in Local Command-Line Utilities
    This attack targets command-line utilities available in a number of shells. An attacker can leverage a vulnerability found in a command-line utility to escalate privilege to root.
Access
VectorComplexityAuthentication
NETWORK LOW NONE
Impact
ConfidentialityIntegrityAvailability
PARTIAL PARTIAL PARTIAL
nessus via4
  • NASL family SuSE Local Security Checks
    NASL id OPENSUSE-2015-48.NASL
    description shim was updated to fix several security issues. - OOB read access when parsing DHCPv6 packets (remote DoS) (CVE-2014-3675). - Heap overflow when parsing IPv6 addresses provided by tftp:// DHCPv6 boot option (RCE) (CVE-2014-3676). - Memory corruption when processing user provided MOK lists (CVE-2014-3677). More information is available at https://bugzilla.novell.com/show_bug.cgi?id=889332 To enable this update gnu-efi was updated to 3.0u and pesign to version 0.109
    last seen 2019-02-21
    modified 2015-01-23
    plugin id 80926
    published 2015-01-23
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=80926
    title openSUSE Security Update : gnu-efi / pesign / shim (openSUSE-2015-48)
  • NASL family Red Hat Local Security Checks
    NASL id REDHAT-RHSA-2014-1801.NASL
    description Updated shim packages that fix three security issues are now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having Moderate 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. Shim is the initial UEFI bootloader that handles chaining to a trusted full bootloader under secure boot environments. A heap-based buffer overflow flaw was found the way shim parsed certain IPv6 addresses. If IPv6 network booting was enabled, a malicious server could supply a crafted IPv6 address that would cause shim to crash or, potentially, execute arbitrary code. (CVE-2014-3676) An out-of-bounds memory write flaw was found in the way shim processed certain Machine Owner Keys (MOKs). A local attacker could potentially use this flaw to execute arbitrary code on the system. (CVE-2014-3677) An out-of-bounds memory read flaw was found in the way shim parsed certain IPv6 packets. A specially crafted DHCPv6 packet could possibly cause shim to crash, preventing the system from booting if IPv6 booting was enabled. (CVE-2014-3675) Red Hat would like to thank the SUSE Security Team for reporting these issues. All shim 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.
    last seen 2019-02-21
    modified 2018-11-10
    plugin id 78867
    published 2014-11-05
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=78867
    title RHEL 7 : shim (RHSA-2014:1801)
  • NASL family Fedora Local Security Checks
    NASL id FEDORA_2014-14059.NASL
    description This update fixes CVEs CVE-2014-3675, CVE-2014-3676, and CVE-2014-3677, as well as moving to the 0.8 release, which adds support for Aarch64 and fixes several bugs. Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen 2019-02-21
    modified 2015-10-19
    plugin id 79195
    published 2014-11-12
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=79195
    title Fedora 19 : mokutil-0.2.0-1.fc19 / shim-signed-0.8-2 (2014-14059)
  • NASL family SuSE Local Security Checks
    NASL id SUSE_11_SHIM-2014-11-20-141119.NASL
    description shim has been updated to fix three security issues : - OOB read access when parsing DHCPv6 packets (remote DoS). (CVE-2014-3675) - Heap overflow when parsing IPv6 addresses provided by tftp:// DHCPv6 boot option (RCE). (CVE-2014-3676) - Memory corruption when processing user provided MOK lists. (CVE-2014-3677)
    last seen 2019-02-21
    modified 2014-12-15
    plugin id 80024
    published 2014-12-15
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=80024
    title SuSE 11.3 Security Update : shim (SAT Patch Number 9997)
  • NASL family Fedora Local Security Checks
    NASL id FEDORA_2014-14058.NASL
    description This update fixes CVEs CVE-2014-3675, CVE-2014-3676, and CVE-2014-3677, as well as moving to the 0.8 release, which adds support for Aarch64 and fixes several bugs. Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen 2019-02-21
    modified 2015-10-19
    plugin id 79194
    published 2014-11-12
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=79194
    title Fedora 20 : mokutil-0.2.0-1.fc20 / shim-signed-0.8-3 (2014-14058)
  • NASL family Oracle Linux Local Security Checks
    NASL id ORACLELINUX_ELSA-2014-1801.NASL
    description From Red Hat Security Advisory 2014:1801 : Updated shim packages that fix three security issues are now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having Moderate 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. Shim is the initial UEFI bootloader that handles chaining to a trusted full bootloader under secure boot environments. A heap-based buffer overflow flaw was found the way shim parsed certain IPv6 addresses. If IPv6 network booting was enabled, a malicious server could supply a crafted IPv6 address that would cause shim to crash or, potentially, execute arbitrary code. (CVE-2014-3676) An out-of-bounds memory write flaw was found in the way shim processed certain Machine Owner Keys (MOKs). A local attacker could potentially use this flaw to execute arbitrary code on the system. (CVE-2014-3677) An out-of-bounds memory read flaw was found in the way shim parsed certain IPv6 packets. A specially crafted DHCPv6 packet could possibly cause shim to crash, preventing the system from booting if IPv6 booting was enabled. (CVE-2014-3675) Red Hat would like to thank the SUSE Security Team for reporting these issues. All shim 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.
    last seen 2019-02-21
    modified 2015-12-01
    plugin id 78882
    published 2014-11-06
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=78882
    title Oracle Linux 7 : shim (ELSA-2014-1801)
  • NASL family Fedora Local Security Checks
    NASL id FEDORA_2014-13581.NASL
    description This update fixes CVEs CVE-2014-3675, CVE-2014-3676, and CVE-2014-3677, as well as moving to the 0.8 release, which adds support for Aarch64 and fixes several bugs. Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen 2019-02-21
    modified 2015-10-19
    plugin id 78809
    published 2014-11-03
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=78809
    title Fedora 21 : mokutil-0.2.0-1.fc21 / shim-0.8-1.fc22 / shim-signed-0.8-1.fc22 (2014-13581)
  • NASL family Scientific Linux Local Security Checks
    NASL id SL_20141104_SHIM_ON_SL7_X.NASL
    description A heap-based buffer overflow flaw was found the way shim parsed certain IPv6 addresses. If IPv6 network booting was enabled, a malicious server could supply a crafted IPv6 address that would cause shim to crash or, potentially, execute arbitrary code. (CVE-2014-3676) An out-of-bounds memory write flaw was found in the way shim processed certain Machine Owner Keys (MOKs). A local attacker could potentially use this flaw to execute arbitrary code on the system. (CVE-2014-3677) An out-of-bounds memory read flaw was found in the way shim parsed certain IPv6 packets. A specially crafted DHCPv6 packet could possibly cause shim to crash, preventing the system from booting if IPv6 booting was enabled. (CVE-2014-3675) The system must be rebooted for this update to take effect.
    last seen 2019-02-21
    modified 2018-12-28
    plugin id 81294
    published 2015-02-11
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=81294
    title Scientific Linux Security Update : shim on SL7.x x86_64
redhat via4
advisories
rhsa
id RHSA-2014:1801
rpms
  • mokutil-0:0.7-8.el7_0
  • shim-unsigned-0:0.7-8.el7_0
  • shim-0:0.7-8.el7_0
refmap via4
bid 70409
mlist [oss-security] 20141013 shim RCE
xf shim-cve20143676-bo(96988)
Last major update 13-11-2014 - 22:04
Published 22-10-2014 - 10:55
Last modified 28-08-2017 - 21:34
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