Vulnerabilities > CVE-2010-3843 - Classic Buffer Overflow vulnerability in Ettercap-Project Ettercap 0.7.3
Attack vector
LOCAL Attack complexity
LOW Privileges required
NONE Confidentiality impact
PARTIAL Integrity impact
PARTIAL Availability impact
PARTIAL Summary
The GTK version of ettercap uses a global settings file at /tmp/.ettercap_gtk and does not verify ownership of this file. When parsing this file for settings in gtkui_conf_read() (src/interfacesgtk/ec_gtk_conf.c), an unchecked sscanf() call allows a maliciously placed settings file to overflow a statically-sized buffer on the stack.
Vulnerable Configurations
| Part | Description | Count |
|---|---|---|
| Application | 1 |
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_2012-1054.NASL description New upstream, and patch for insecure global settings file. Restored RPM_OPT_FLAGS to build. New upstream, and patch for insecure global settings file. New upstream, and patch for insecure global settings file. New upstream, and patch for insecure global settings file. 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 2012-02-09 plugin id 57866 published 2012-02-09 reporter This script is Copyright (C) 2012-2020 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/57866 title Fedora 16 : ettercap-0.7.4-3.fc16 (2012-1054) NASL family Fedora Local Security Checks NASL id FEDORA_2012-1066.NASL description New upstream, and patch for insecure global settings file. Restored RPM_OPT_FLAGS to build. New upstream, and patch for insecure global settings file. New upstream, and patch for insecure global settings file. New upstream, and patch for insecure global settings file. 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 2012-02-09 plugin id 57867 published 2012-02-09 reporter This script is Copyright (C) 2012-2020 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/57867 title Fedora 15 : ettercap-0.7.4-3.fc15 (2012-1066) NASL family Mandriva Local Security Checks NASL id MANDRIVA_MDVSA-2013-077.NASL description Updated ettercap package fixes security vulnerability : The GTK version of ettercap uses a global settings file at /tmp/.ettercap_gtk and does not verify ownership of this file. When parsing this file for settings in gtkui_conf_read\(\) (src/interfaces/gtk/ec_gtk_conf.c), an unchecked sscanf\(\) call allows a maliciously placed settings file to overflow a statically-sized buffer on the stack (CVE-2010-3843). last seen 2020-06-01 modified 2020-06-02 plugin id 66091 published 2013-04-20 reporter This script is Copyright (C) 2013-2019 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/66091 title Mandriva Linux Security Advisory : ettercap (MDVSA-2013:077) NASL family Gentoo Local Security Checks NASL id GENTOO_GLSA-201405-12.NASL description The remote host is affected by the vulnerability described in GLSA-201405-12 (Ettercap: Multiple vulnerabilities) Multiple vulnerabilities have been discovered in Ettercap: Ettercap does not handle temporary files securely (CVE-2010-3843). A format string flaw in Ettercap could cause a buffer overflow (CVE-2010-3844). A stack-based buffer overflow exists in Ettercap (CVE-2013-0722). Impact : A remote attacker could entice a user to load a specially crafted configuration file using Ettercap, possibly resulting in execution of arbitrary code with the privileges of the process or a Denial of Service condition. A local attacker could perform symlink attacks to overwrite arbitrary files with the privileges of the user running the application. Workaround : There is no known workaround at this time. last seen 2020-06-01 modified 2020-06-02 plugin id 74055 published 2014-05-19 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/74055 title GLSA-201405-12 : Ettercap: Multiple vulnerabilities