ID CVE-2012-4527
Summary Stack-based buffer overflow in mcrypt 2.6.8 and earlier allows user-assisted remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a long file name. NOTE: it is not clear whether this is a vulnerability.
References
Vulnerable Configurations
  • cpe:2.3:a:mcrypt:mcrypt:2.6.8
    cpe:2.3:a:mcrypt:mcrypt:2.6.8
  • cpe:2.3:a:mcrypt:mcrypt:2.6.7
    cpe:2.3:a:mcrypt:mcrypt:2.6.7
  • cpe:2.3:a:mcrypt:mcrypt:2.6.6
    cpe:2.3:a:mcrypt:mcrypt:2.6.6
  • cpe:2.3:a:mcrypt:mcrypt:2.6.5
    cpe:2.3:a:mcrypt:mcrypt:2.6.5
  • cpe:2.3:a:mcrypt:mcrypt:2.6.4
    cpe:2.3:a:mcrypt:mcrypt:2.6.4
CVSS
Base: 6.8 (as of 22-11-2012 - 08:49)
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 MEDIUM NONE
Impact
ConfidentialityIntegrityAvailability
PARTIAL PARTIAL PARTIAL
nessus via4
  • NASL family Fedora Local Security Checks
    NASL id FEDORA_2012-17339.NASL
    description Apply workaround for CVE-2012-4527. 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 2015-10-20
    plugin id 62850
    published 2012-11-08
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=62850
    title Fedora 18 : mcrypt-2.6.8-10.fc18 (2012-17339)
  • NASL family Fedora Local Security Checks
    NASL id FEDORA_2012-17318.NASL
    description Apply workaround for CVE-2012-4527. 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 2015-10-20
    plugin id 62849
    published 2012-11-08
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=62849
    title Fedora 16 : mcrypt-2.6.8-10.fc16 (2012-17318)
  • NASL family Gentoo Local Security Checks
    NASL id GENTOO_GLSA-201405-19.NASL
    description The remote host is affected by the vulnerability described in GLSA-201405-19 (MCrypt: User-assisted execution of arbitrary code) Multiple vulnerabilities have been discovered in MCrypt: A boundary error in MCrypt could cause a stack-based buffer overflow (CVE-2012-4409). MCrypt contains multiple format string errors (CVE-2012-4426). MCrypt does not properly handle long file names, which could cause a stack-based buffer overflow (CVE-2012-4527). Impact : A remote attacker could entice a user to open a specially crafted file using MCrypt, possibly resulting in execution of arbitrary code with the privileges of the process or a Denial of Service condition. Workaround : There is no known workaround at this time.
    last seen 2019-02-21
    modified 2018-12-05
    plugin id 74061
    published 2014-05-19
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=74061
    title GLSA-201405-19 : MCrypt: User-assisted execution of arbitrary code
  • NASL family Fedora Local Security Checks
    NASL id FEDORA_2012-17290.NASL
    description Apply workaround for CVE-2012-4527. 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 2015-10-20
    plugin id 62847
    published 2012-11-08
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=62847
    title Fedora 17 : mcrypt-2.6.8-10.fc17 (2012-17290)
  • NASL family SuSE Local Security Checks
    NASL id OPENSUSE-2012-758.NASL
    description Some potential mcrypt buffer overflows in the commandline tool were fixed, which could lead to early aborts of mcrypt. Due to FORTIFY_SOURCE catching such cases, it would have only aborted mcrypt with a buffer overflow backtrace.
    last seen 2019-02-21
    modified 2018-11-10
    plugin id 74803
    published 2014-06-13
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=74803
    title openSUSE Security Update : mcrypt (openSUSE-SU-2012:1440-1)
refmap via4
bid 56114
fedora
  • FEDORA-2012-17290
  • FEDORA-2012-17318
  • FEDORA-2012-17339
misc https://bugzilla.redhat.com/show_bug.cgi?id=867790
mlist
  • [oss-security] 20121018 CVE Request -- mcrypt: stack-based buffer overflow by encryption / decryption of overly long file names
  • [oss-security] 20121018 Re: CVE Request -- mcrypt: stack-based buffer overflow by encryption / decryption of overly long file names
  • [oss-security] 20121119 Re: CVE Request -- mcrypt: stack-based buffer overflow by encryption / decryption of overly long file names
suse openSUSE-SU-2012:1440
Last major update 07-12-2016 - 22:02
Published 21-11-2012 - 18:55
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