Vulnerabilities > CVE-2013-7038 - Improper Restriction of Operations Within the Bounds of A Memory Buffer vulnerability in GNU Libmicrohttpd
Attack vector
NETWORK Attack complexity
LOW Privileges required
NONE Confidentiality impact
PARTIAL Integrity impact
NONE Availability impact
PARTIAL Summary
The MHD_http_unescape function in libmicrohttpd before 0.9.32 might allow remote attackers to obtain sensitive information or cause a denial of service (crash) via unspecified vectors that trigger an out-of-bounds read.
Vulnerable Configurations
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 SuSE Local Security Checks NASL id SUSE_SU-2017-1576-1.NASL description This update for libmicrohttpd fixes the following issues : - CVE-2013-7038: The MHD_http_unescape function in libmicrohttpd might have allowed remote attackers to obtain sensitive information or cause a denial of service (crash) via unspecified vectors that trigger an out-of-bounds read. (bsc#854443) - CVE-2013-7039: Stack-based buffer overflow in the MHD_digest_auth_check function in libmicrohttpd, when MHD_OPTION_CONNECTION_MEMORY_LIMIT is set to a large value, allowed remote attackers to cause a denial of service (crash) or possibly execute arbitrary code via a long URI in an authentication header. (bsc#854443) - Fixed various bugs found during a 2017 audit, which are more hardening measures and not security issues. (bsc#1041216) Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-06-01 modified 2020-06-02 plugin id 100864 published 2017-06-19 reporter This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/100864 title SUSE SLES12 Security Update : libmicrohttpd (SUSE-SU-2017:1576-1) NASL family SuSE Local Security Checks NASL id OPENSUSE-2017-728.NASL description This update for libmicrohttpd fixes the following issues : - CVE-2013-7038: The MHD_http_unescape function in libmicrohttpd might have allowed remote attackers to obtain sensitive information or cause a denial of service (crash) via unspecified vectors that trigger an out-of-bounds read. (bsc#854443) - CVE-2013-7039: Stack-based buffer overflow in the MHD_digest_auth_check function in libmicrohttpd, when MHD_OPTION_CONNECTION_MEMORY_LIMIT is set to a large value, allowed remote attackers to cause a denial of service (crash) or possibly execute arbitrary code via a long URI in an authentication header. (bsc#854443) - Fixed various bugs found during a 2017 audit, which are more hardening measures and not security issues. (bsc#1041216) This update was imported from the SUSE:SLE-12:Update update project. last seen 2020-06-05 modified 2017-06-30 plugin id 101130 published 2017-06-30 reporter This script is Copyright (C) 2017-2020 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/101130 title openSUSE Security Update : libmicrohttpd (openSUSE-2017-728) NASL family Gentoo Local Security Checks NASL id GENTOO_GLSA-201402-01.NASL description The remote host is affected by the vulnerability described in GLSA-201402-01 (GNU libmicrohttpd: Multiple vulnerabilities) Multiple vulnerabilities have been discovered in GNU libmicrohttpd. Please review the CVE identifiers referenced below for details. Impact : A remote attacker could execute arbitrary code with the privileges of the process, cause a Denial of Service condition, or obtain sensitive information. Workaround : There is no known workaround at this time. last seen 2020-06-01 modified 2020-06-02 plugin id 72254 published 2014-02-03 reporter This script is Copyright (C) 2014-2018 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/72254 title GLSA-201402-01 : GNU libmicrohttpd: Multiple vulnerabilities NASL family Amazon Linux Local Security Checks NASL id ALA_ALAS-2014-353.NASL description Stack-based buffer overflow in the MHD_digest_auth_check function in libmicrohttpd before 0.9.32, when MHD_OPTION_CONNECTION_MEMORY_LIMIT is set to a large value, allows remote attackers to cause a denial of service (crash) or possibly execute arbitrary code via a long URI in an authentication header. The MHD_http_unescape function in libmicrohttpd before 0.9.32 might allow remote attackers to obtain sensitive information or cause a denial of service (crash) via unspecified vectors that trigger an out-of-bounds read. last seen 2020-06-01 modified 2020-06-02 plugin id 78296 published 2014-10-12 reporter This script is Copyright (C) 2014-2018 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/78296 title Amazon Linux AMI : libmicrohttpd (ALAS-2014-353)
References
- http://secunia.com/advisories/55903
- http://security.gentoo.org/glsa/glsa-201402-01.xml
- http://www.openwall.com/lists/oss-security/2013/12/09/11
- http://www.securityfocus.com/bid/64138
- https://bugs.gentoo.org/show_bug.cgi?id=493450
- https://bugzilla.redhat.com/show_bug.cgi?id=1039384
- https://gnunet.org/svn/libmicrohttpd/ChangeLog