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)
94 lines
3.2 KiB
Text
94 lines
3.2 KiB
Text
-----BEGIN PGP SIGNED MESSAGE-----
|
|
|
|
=============================================================================
|
|
FreeBSD-SA-01:44 Security Advisory
|
|
FreeBSD, Inc.
|
|
|
|
Topic: gnupg contains format string vulnerability
|
|
|
|
Category: ports
|
|
Module: gnupg
|
|
Announced: 2001-07-10
|
|
Credits: fish stiqz <fish@analog.org>
|
|
Affects: Ports collection prior to the correction date.
|
|
Corrected: 2001-05-30
|
|
Vendor status: Updated version released
|
|
FreeBSD only: NO
|
|
|
|
I. Background
|
|
|
|
GnuPG is an implementation of the PGP digital signature/encryption
|
|
protocol
|
|
|
|
II. Problem Description
|
|
|
|
The gnupg port, versions prior to gnupg-1.0.6, contains a format
|
|
string vulnerability. If gnupg attempts to decrypt a file whose
|
|
filename does not end in '.gpg', the filename is copied to the
|
|
prompt string, allowing a user-supplied format string. This may allow
|
|
a malicious user to cause arbitrary code to be executed as the user
|
|
running gnupg.
|
|
|
|
The gnupg port is not installed by default, nor is it "part of
|
|
FreeBSD" as such: it is part of the FreeBSD ports collection, which
|
|
contains over 5400 third-party applications in a ready-to-install
|
|
format. The ports collection shipped with FreeBSD 4.3 is vulnerable
|
|
to this problem since it was discovered after its release.
|
|
|
|
FreeBSD makes no claim about the security of these third-party
|
|
applications, although an effort is underway to provide a security
|
|
audit of the most security-critical ports.
|
|
|
|
III. Impact
|
|
|
|
A malicious user supplying a file to be decrypted by the target user
|
|
running gnupg may be able to craft a filename causing arbitrary code
|
|
to be executed as the user running gnupg.
|
|
|
|
If you have not chosen to install the gnupg port/package, then
|
|
your system is not vulnerable to this problem.
|
|
|
|
IV. Workaround
|
|
|
|
Deinstall the gnupg port/package if you have installed it.
|
|
|
|
V. Solution
|
|
|
|
One of the following:
|
|
|
|
1) Upgrade your entire ports collection and rebuild the gnupg port.
|
|
|
|
2) Deinstall the old package and install a new package dated after the
|
|
correction date, obtained from the following directories:
|
|
|
|
[i386]
|
|
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-4-stable/security/gnupg-1.0.6_1.tgz
|
|
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-5-current/security/gnupg-1.0.6_1.tgz
|
|
|
|
[alpha]
|
|
Packages are not automatically generated for the alpha architecture at
|
|
this time due to lack of build resources.
|
|
|
|
3) download a new port skeleton for the gnupg port from:
|
|
|
|
http://www.freebsd.org/ports/
|
|
|
|
and use it to rebuild the port.
|
|
|
|
4) Use the portcheckout utility to automate option (3) above. The
|
|
portcheckout port is available in /usr/ports/devel/portcheckout or the
|
|
package can be obtained from:
|
|
|
|
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-4-stable/devel/portcheckout-2.0.tgz
|
|
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-5-current/devel/portcheckout-2.0.tgz
|
|
|
|
-----BEGIN PGP SIGNATURE-----
|
|
Version: GnuPG v1.0.6 (FreeBSD)
|
|
Comment: FreeBSD: The Power To Serve
|
|
|
|
iQCVAwUBO0sNuVUuHi5z0oilAQEnPAP/XadCoa6avlv67LottE8OKLdxSbMRgVXL
|
|
haBWIyZTMSLRiwgfiQS1riDXslCT8rI8piXSv5HI1zjT7OgkV6zXXRP2pez/EdLe
|
|
H9sHUJMZNYP1VRfUUlxkmwfelT9cgD2Di3y9vrDouZTt4B5wEGgrzeNeQq1eFNlc
|
|
7SvBBZsxEZQ=
|
|
=g1DW
|
|
-----END PGP SIGNATURE-----
|