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-----BEGIN PGP SIGNED MESSAGE----- |
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Hash: SHA1 |
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- - --------------------------------------------------------------------- |
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GENTOO LINUX SECURITY ANNOUNCEMENT 200303-15 |
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|
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PACKAGE : openssl |
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SUMMARY : timing based attack |
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DATE : 2003-03-20 09:20 UTC |
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EXPLOIT : remote |
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VERSIONS AFFECTED : <0.9.6i-r1 |
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FIXED VERSION : >=0.9.6i-r1 |
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CVE : CAN-2003-0147 |
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|
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|
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- From advisory: |
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|
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"Researchers have discovered a timing attack on RSA keys, to which |
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OpenSSL is generally vulnerable, unless RSA blinding has been turned |
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on. |
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|
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Typically, it will not have been, because it is not easily possible to |
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do so when using OpenSSL to provide SSL or TLS. |
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|
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The enclosed patch switches blinding on by default. Applications that |
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wish to can remove the blinding with RSA_blinding_off(), but this is |
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not generally advised. It is also possible to disable it completely by |
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defining OPENSSL_NO_FORCE_RSA_BLINDING at compile-time. |
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|
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The performance impact of blinding appears to be small (a few |
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percent)." |
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|
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Read the full advisory at |
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http://www.openssl.org/news/secadv_20030317.txt |
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|
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SOLUTION |
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|
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It is recommended that all Gentoo Linux users who are running |
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dev-libs/openssl upgrade to openssl-0.9.6i-r1 as follows: |
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|
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emerge sync |
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emerge openssl |
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emerge clean |
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|
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- - --------------------------------------------------------------------- |
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aliz@g.o - GnuPG key is available at http://cvs.gentoo.org/~aliz |
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- - --------------------------------------------------------------------- |
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