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Home » Security Advisories» OpenPKG » OpenSSL potential SSL 2.0 rollback

OpenSSL potential SSL 2.0 rollback

According to a vendor security advisory, a potential SSL 2.0 protocol rollback attack vulnerability exists in the cryptography toolkit OpenSSL [1]. The vulnerability potentially affects applications that use the SSL/TLS server implementation provided by OpenSSL. Such applications are affected if they use the option "SSL_OP_MSIE_SSLV2_RSA_PADDING". Applications using neither "SSL_OP_MSIE_SSLV2_RSA_PADDING" nor "SSL_OP_ALL" are not affected. Also, applications that disable use of SSL 2.0 are not affected.

  • Vendor: OpenPKG
  • Vendor ID: SA-2005.022
  • Date: October 17, 2005


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________________________________________________________________________

OpenPKG Security Advisory The OpenPKG Project
http://www.openpkg.org/security.html http://www.openpkg.org
[email protected] [email protected]
OpenPKG-SA-2005.022 17-Oct-2005
________________________________________________________________________

Package: openssl
Vulnerability: potential SSL 2.0 rollback
OpenPKG Specific: no

Affected Releases: Affected Packages: Corrected Packages:
OpenPKG CURRENT <= openssl-0.9.8-2005092 >= openssl-0.9.8a-20051011
OpenPKG 2.4 <= openssl-0.9.7g-2.4.1 >= openssl-0.9.7g-2.4.2
OpenPKG 2.3 <= openssl-0.9.7e-2.3.2 >= openssl-0.9.7e-2.3.3

Dependent Packages: unknown

Description:
According to a vendor security advisory [0], a potential SSL 2.0
protocol rollback attack vulnerability exists in the cryptography
toolkit OpenSSL [1]. The vulnerability potentially affects
applications that use the SSL/TLS server implementation provided
by OpenSSL. Such applications are affected if they use the option
"SSL_OP_MSIE_SSLV2_RSA_PADDING". Applications using neither
"SSL_OP_MSIE_SSLV2_RSA_PADDING" nor "SSL_OP_ALL" are not affected.
Also, applications that disable use of SSL 2.0 are not affected. The
Common Vulnerabilities and Exposures (CVE) project assigned the id
CAN-2005-2969 [2] to the problem.

Please check whether you are affected by running "/bin/openpkg
rpm -q openssl". If you have the "openssl" package installed and its
version is affected (see above), we recommend that you immediately
upgrade it (see Solution) [3][4].

Solution:
Select the updated source RPM appropriate for your OpenPKG release
[5][6], fetch it from the OpenPKG FTP service [7][8] or a mirror
location, verify its integrity [9], build a corresponding binary RPM
from it [3] and update your OpenPKG installation by applying the
binary RPM [4]. For the most recent release OpenPKG 2.4, perform the
following operations to permanently fix the security problem (for
other releases adjust accordingly).

$ ftp ftp.openpkg.org
ftp> bin
ftp> cd release/2.4/UPD
ftp> get openssl-0.9.7g-2.4.2.src.rpm
ftp> bye
$ /bin/openpkg rpm -v --checksig openssl-0.9.7g-2.4.2.src.rpm
$ /bin/openpkg rpm --rebuild openssl-0.9.7g-2.4.2.src.rpm
$ su -
# /bin/openpkg rpm -Fvh /RPM/PKG/openssl-0.9.7g-2.4.2.*.rpm
________________________________________________________________________

References:
[0] http://www.openssl.org/news/secadv_20051011.txt
[1] http://www.openssl.org/
[2] http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-2969
[3] http://www.openpkg.org/tutorial.html#regular-source
[4] http://www.openpkg.org/tutorial.html#regular-binary
[5] ftp://ftp.openpkg.org/release/2.4/UPD/openssl-0.9.7g-2.4.2.src.rpm
[6] ftp://ftp.openpkg.org/release/2.3/UPD/openssl-0.9.7e-2.3.3.src.rpm
[7] ftp://ftp.openpkg.org/release/2.4/UPD/
[8] ftp://ftp.openpkg.org/release/2.3/UPD/
[9] http://www.openpkg.org/security.html#signature
________________________________________________________________________

For security reasons, this advisory was digitally signed with the
OpenPGP public key "OpenPKG " (ID 63C4CB9F) of the
OpenPKG project which you can retrieve from http://pgp.openpkg.org and
hkp://pgp.openpkg.org. Follow the instructions on http://pgp.openpkg.org/
for details on how to verify the integrity of this advisory.
________________________________________________________________________

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