3571e53040
patches for easier mirroring, to eliminate a special copy, to make www.freebsd.org/security a full copy of security.freebsd.org and be eventually be the same. For now files are just sitting there. The symlinks are missing. Discussed on: www (repository location) Discussed with: simon (so)
92 lines
3.6 KiB
Text
92 lines
3.6 KiB
Text
-----BEGIN PGP SIGNED MESSAGE-----
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=============================================================================
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FreeBSD-SA-00:67 Security Advisory
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FreeBSD, Inc.
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Topic: gnupg fails to correctly verify signatures
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Category: ports
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Module: gnupg
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Announced: 2000-11-10
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Credits: Jim Small <cavenewt@MY-DEJA.COM>
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Affects: Ports collection prior to the correction date.
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Corrected: 2000-10-18
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Vendor status: Updated version released
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FreeBSD only: NO
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I. Background
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GnuPG is an implementation of the PGP digital signature/encryption
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protocol.
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II. Problem Description
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Versions of gnupg prior to 1.04 fail to correctly verify multiple
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signatures contained in a single document. Only the first signature
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encountered is actually verified, meaning that other data with invalid
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signatures (e.g. data which has been tampered with by an attacker)
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will not be verified, and the entire document will be treated as
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having valid signatures.
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The gnupg port is not installed by default, nor is it "part of
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FreeBSD" as such: it is part of the FreeBSD ports collection, which
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contains over 4100 third-party applications in a ready-to-install
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format. The ports collections shipped with FreeBSD 3.5.1 and 4.1.1 are
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vulnerable to this problem since it was discovered after the releases,
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but it was corrected prior to the release of FreeBSD 4.2.
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FreeBSD makes no claim about the security of these third-party
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applications, although an effort is underway to provide a security
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audit of the most security-critical ports.
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III. Impact
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Documents containing multiple signed regions of data can be corrupted
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or tampered with by an attacker without detection, as long as the
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first signature in the document remains valid.
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IV. Workaround
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Deinstall the gnupg port/package, if you you have installed it.
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V. Solution
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One of the following:
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1) Upgrade your entire ports collection and rebuild the gnupg port.
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2) Deinstall the old package and install a new package dated after the
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correction date, obtained from the following directories:
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ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-3-stable/security/gnupg-1.04.tgz
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ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-4-stable/security/gnupg-1.04.tgz
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ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/alpha/packages-4-stable/security/gnupg-1.04.tgz
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ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-5-current/security/gnupg-1.04.tgz
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ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/alpha/packages-5-current/security/gnupg-1.04.tgz
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3) download a new port skeleton for the gnupg port from:
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http://www.freebsd.org/ports/
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and use it to rebuild the port.
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4) Use the portcheckout utility to automate option (3) above. The
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portcheckout port is available in /usr/ports/devel/portcheckout or the
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package can be obtained from:
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ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-3-stable/devel/portcheckout-2.0.tgz
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ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-4-stable/devel/portcheckout-2.0.tgz
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ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/alpha/packages-4-stable/devel/portcheckout-2.0.tgz
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ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-5-current/devel/portcheckout-2.0.tgz
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ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/alpha/packages-5-current/devel/portcheckout-2.0.tgz
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-----BEGIN PGP SIGNATURE-----
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Version: GnuPG v1.0.4 (FreeBSD)
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Comment: For info see http://www.gnupg.org
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iQCVAwUBOgx6dlUuHi5z0oilAQEGaAP+KXIJlLBgF7tXXtLWcyJkhI6mAxgMyHEJ
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y+9RkI22mz7etMN1Nqm22Rj1cYBO99Q35lx4qJpuGftuRV+D9P6f5FbXMp+qhw24
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K1t07eQhgiiNO1y9snvvEwwWtsHiosMFyIleFdbJwXoioqNsDFcByOwbG7zoEOOU
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BfDBTmKtPvQ=
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=1ZMA
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-----END PGP SIGNATURE-----
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