Vulnerabilities > CVE-2016-6830 - Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in Call-Cc Chicken
Attack vector
NETWORK Attack complexity
LOW Privileges required
NONE Confidentiality impact
PARTIAL Integrity impact
PARTIAL Availability impact
PARTIAL Summary
The "process-execute" and "process-spawn" procedures in CHICKEN Scheme used fixed-size buffers for holding the arguments and environment variables to use in its execve() call. This would allow user-supplied argument/environment variable lists to trigger a buffer overrun. This affects all releases of CHICKEN up to and including 4.11 (it will be fixed in 4.12 and 5.0, which are not yet released).
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 Debian Local Security Checks NASL id DEBIAN_DLA-643.NASL description Multiple vulnerabilities have been found in the CHICKEN Scheme compiler : CVE-2016-6830 Buffer overrun in CHICKEN Scheme last seen 2020-03-17 modified 2016-10-04 plugin id 93834 published 2016-10-04 reporter This script is Copyright (C) 2016-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/93834 title Debian DLA-643-1 : chicken security update NASL family Fedora Local Security Checks NASL id FEDORA_2016-9B3ED5F170.NASL description Security fix for CVE-2016-6830, CVE-2016-6831 Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-06-05 modified 2017-01-19 plugin id 96615 published 2017-01-19 reporter This script is Copyright (C) 2017-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/96615 title Fedora 25 : chicken (2016-9b3ed5f170) NASL family FreeBSD Local Security Checks NASL id FREEBSD_PKG_C6932DD4EAFF11E69AC1A4BADB2F4699.NASL description Peter Bex reports : A buffer overflow error was found in the POSIX unit last seen 2020-06-01 modified 2020-06-02 plugin id 96995 published 2017-02-06 reporter This script is Copyright (C) 2017-2018 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/96995 title FreeBSD : chicken -- multiple vulnerabilities (c6932dd4-eaff-11e6-9ac1-a4badb2f4699) NASL family Fedora Local Security Checks NASL id FEDORA_2016-0EF628998F.NASL description Security fix for CVE-2016-6830, CVE-2016-6831 Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-06-05 modified 2017-01-19 plugin id 96614 published 2017-01-19 reporter This script is Copyright (C) 2017-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/96614 title Fedora 24 : chicken (2016-0ef628998f)