An issue was discovered in CHICKEN Scheme through 4.12.0. When using a nonstandard CHICKEN-specific extension to allocate an SRFI-4 vector in unmanaged memory, the vector size would be used in unsanitised form as an argument to malloc(). With an unexpected size, the impact may have been a segfault or buffer overflow.

CHICKEN reports :

- CVE-2017-6949: Unchecked malloc() call in SRFI-4 constructors when allocating in non-GC memory, resulting in potential 1-word buffer overrun and/or segfault

- CVE-2017-9334: 'length' crashes on improper lists

- CVE-2017-11343: The randomization factor of the symbol table was set before the random seed was set, causing it to have a fixed value on many platforms

Fix for CVE-2017-6949, also bump to 4.12.0

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.

It was found that CHICKEN did not sanitize the size argument when allocating SRFI-4 vectors, which could lead to segfaults or buffer overflows with some sizes.

For Debian 7 'Wheezy', these problems have been fixed in version 4.7.0-1+deb7u2.

We recommend that you upgrade your chicken packages.

NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

ID	Name	Product	Family	Severity
111655	FreeBSD : chicken -- multiple vulnerabilities (5a771686-9e33-11e8-8b2d-9cf7a8059466)	Nessus	FreeBSD Local Security Checks	high
101584	Fedora 26 : chicken (2017-1f3ee3bea6)	Nessus	Fedora Local Security Checks	high
100335	Fedora 25 : chicken (2017-cc606f1001)	Nessus	Fedora Local Security Checks	high
100333	Fedora 24 : chicken (2017-947da3daa5)	Nessus	Fedora Local Security Checks	high
99602	Debian DLA-908-1 : chicken security update	Nessus	Debian Local Security Checks	high

Detections

Analytics

CVE-2017-6949

high

Tenable Plugins

high

high

high

high

high