simgear

Commit Graph

Author	SHA1	Message	Date
curt	e264c6ad2e	Updates to remove unneeded and old version of zlib source.	19 years ago
curt	77e43a5fa8	- Added src-libs/boost.tar.gz and README.boost. This is in anticipation of actually using them in the flightgear event manager. - Now that we have several add on libs we are bundling with simgear (but not automatically built as part of the simgear build) I have moved them to their own subdirectory (src-libs).	23 years ago
curt	f6ed02c3fb	zlib-1.1.3 had a potential security flaw which is fixed by zlib-1.1.4: -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Zlib Advisory 2002-03-11 zlib Compression Library Corrupts malloc Data Structures via Double Free Original release date: March 11, 2002 Last revised: March 11, 2002 Source: This advisory is based on a CERT advisory written by Jeffrey P. Lanza http://www.kb.cert.org/vuls/id/368819 Systems Affected * Any software that is linked against zlib 1.1.3 or earlier * Any data compression library derived from zlib 1.1.3 or earlier Overview There is a vulnerability in the zlib shared library that may introduce vulnerabilities into any program that includes zlib. This vulnerability has been assigned a CVE name of CAN-2002-0059 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2002-0059 I. Description There is a vulnerability in the decompression algorithm used by the popular zlib compression library. If an attacker is able to pass a specially-crafted block of invalid compressed data to a program that includes zlib, the program's attempt to decompress the crafted data can cause the zlib routines to corrupt the internal data structures maintained by malloc. The vulnerability results from a programming error that causes segments of dynamically allocated memory to be released more than once (aka. "double-freed"). Specifically, when inftrees.c:huft_build() encounters the crafted data, it returns an unexpected Z_MEM_ERROR to inftrees.c:inflate_trees_dynamic(). When a subsequent call is made to infblock.c:inflate_blocks(), the inflate_blocks function tries to free an internal data structure a second time. Because this vulnerability interferes with the proper allocation and de-allocation of dynamic memory, it may be possible for an attacker to influence the operation of programs that include zlib. In most circumstances, this influence will be limited to denial of service or information leakage, but it is theoretically possible for an attacker to insert arbitrary code into a running program. This code would be executed with the permissions of the vulnerable program. II. Impact This vulnerability may introduce vulnerabilities into any program that includes the affected library. Depending upon how and where the zlib routines are called from the given program, the resulting vulnerability may have one or more of the following impacts: denial of service, information leakage, or execution of arbitrary code. III. Solution Upgrade your version of zlib The maintainers of zlib have released version 1.1.4 to address this vulnerability. Any software that is linked against or derived from an earlier version of zlib should be upgraded immediately. The latest version of zlib is available at http://www.zlib.org The md5 sums of the source archives are: abc405d0bdd3ee22782d7aa20e440f08 zlib-1.1.4.tar.gz ea16358be41384870acbdc372f9db152 zlib-1.1.4.tar.bz2 IV. Acknowledgments Thanks to Owen Taylor and Mark Cox of Redhat, Inc. for the reporting and research of this vulnerability. This document is available from http://www.gzip.org/zlib/advisory-2002-03-11.txt The public PGP key of zlib author Jean-loup Gailly is available from http://www.gzip.org/zlib/jloup.asc -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.0.6 (GNU/Linux) Comment: For info see http://www.gnupg.org iD8DBQE8jSR02aJ9JQGWcacRAuDEAKCWdrRkWeJV9lYU5z8NN56s3m8eKACglR4m 42KDUGHuftBkwACTMCnZLEo= =3yLS -----END PGP SIGNATURE-----	23 years ago
curt	5039c84fd0	Removed metakit and zlib from the configure/build process. The developer will need to build and install these separately if they don't have packages already installed by their system. See README.metakit and README.zlib for more details. As a convenience, pristine tarballs of the metakit and zlib source code trees are included with the simgear distribution (and cvs.)	23 years ago

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