Vulnerabilities > CVE-2012-4527 - Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in Mcrypt
Attack vector
UNKNOWN Attack complexity
UNKNOWN Privileges required
UNKNOWN Confidentiality impact
UNKNOWN Integrity impact
UNKNOWN Availability impact
UNKNOWN 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.
Vulnerable Configurations
Part | Description | Count |
---|---|---|
Application | 5 |
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (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.
Nessus
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 2020-03-17 modified 2012-11-08 plugin id 62850 published 2012-11-08 reporter This script is Copyright (C) 2012-2020 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/62850 title Fedora 18 : mcrypt-2.6.8-10.fc18 (2012-17339) code #%NASL_MIN_LEVEL 80502 # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from Fedora Security Advisory 2012-17339. # include("compat.inc"); if (description) { script_id(62850); script_version("1.9"); script_set_attribute(attribute:"plugin_modification_date", value:"2020/03/12"); script_cve_id("CVE-2012-4527"); script_bugtraq_id(56114); script_xref(name:"FEDORA", value:"2012-17339"); script_name(english:"Fedora 18 : mcrypt-2.6.8-10.fc18 (2012-17339)"); 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: "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." ); script_set_attribute( attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=867790" ); # https://lists.fedoraproject.org/pipermail/package-announce/2012-November/091377.html script_set_attribute( attribute:"see_also", value:"http://www.nessus.org/u?bc9bba55" ); script_set_attribute( attribute:"solution", value:"Update the affected mcrypt package." ); 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:ND/RL:OF/RC:ND"); 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:fedoraproject:fedora:mcrypt"); script_set_attribute(attribute:"cpe", value:"cpe:/o:fedoraproject:fedora:18"); script_set_attribute(attribute:"patch_publication_date", value:"2012/10/31"); script_set_attribute(attribute:"plugin_publication_date", value:"2012/11/08"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_copyright(english:"This script is Copyright (C) 2012-2020 Tenable Network Security, Inc."); 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 = eregmatch(pattern: "Fedora.*release ([0-9]+)", string:release); if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Fedora"); os_ver = os_ver[1]; if (! ereg(pattern:"^18([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Fedora 18.x", "Fedora " + os_ver); if (!get_kb_item("Host/RedHat/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING); cpu = get_kb_item("Host/cpu"); if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH); if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Fedora", cpu); flag = 0; if (rpm_check(release:"FC18", reference:"mcrypt-2.6.8-10.fc18")) flag++; if (flag) { if (report_verbosity > 0) security_warning(port:0, extra:rpm_report_get()); else security_warning(0); exit(0); } else { tested = pkg_tests_get(); if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested); else audit(AUDIT_PACKAGE_NOT_INSTALLED, "mcrypt"); }
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 2020-03-17 modified 2012-11-08 plugin id 62849 published 2012-11-08 reporter This script is Copyright (C) 2012-2020 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/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 2020-06-01 modified 2020-06-02 plugin id 74061 published 2014-05-19 reporter This script is Copyright (C) 2014-2018 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/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 2020-03-17 modified 2012-11-08 plugin id 62847 published 2012-11-08 reporter This script is Copyright (C) 2012-2020 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/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 2020-06-05 modified 2014-06-13 plugin id 74803 published 2014-06-13 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/74803 title openSUSE Security Update : mcrypt (openSUSE-SU-2012:1440-1)
References
- http://lists.fedoraproject.org/pipermail/package-announce/2012-November/091173.html
- http://www.openwall.com/lists/oss-security/2012/10/18/12
- https://bugzilla.redhat.com/show_bug.cgi?id=867790
- http://www.openwall.com/lists/oss-security/2012/10/18/9
- http://lists.fedoraproject.org/pipermail/package-announce/2012-November/091377.html
- http://lists.opensuse.org/opensuse-updates/2012-11/msg00003.html
- http://www.openwall.com/lists/oss-security/2012/11/20/1
- http://lists.fedoraproject.org/pipermail/package-announce/2012-November/091206.html
- http://www.securityfocus.com/bid/56114