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Gentoo Linux Security Advisory GLSA 200610-06 |
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http://security.gentoo.org/ |
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Severity: Normal |
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Title: Mozilla Network Security Service (NSS): RSA signature |
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forgery |
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Date: October 17, 2006 |
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Bugs: #148283 |
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ID: 200610-06 |
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Synopsis |
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======== |
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|
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NSS fails to properly validate PKCS #1 v1.5 signatures. |
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Background |
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========== |
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|
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The Mozilla Network Security Service is a library implementing security |
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features like SSL v.2/v.3, TLS, PKCS #5, PKCS #7, PKCS #11, PKCS #12, |
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S/MIME and X.509 certificates. |
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|
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Affected packages |
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================= |
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|
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------------------------------------------------------------------- |
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Package / Vulnerable / Unaffected |
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------------------------------------------------------------------- |
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1 dev-libs/nss < 3.11.3 >= 3.11.3 |
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|
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Description |
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=========== |
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|
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Daniel Bleichenbacher discovered that it might be possible to forge |
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signatures signed by RSA keys with the exponent of 3. This affects a |
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number of RSA signature implementations, including Mozilla's NSS. |
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|
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Impact |
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====== |
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|
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Since several Certificate Authorities (CAs) are using an exponent of 3 |
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it might be possible for an attacker to create a key with a false CA |
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signature. This impacts any software using the NSS library, like the |
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Mozilla products Firefox, Thunderbird and Seamonkey. |
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|
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Workaround |
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========== |
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There is no known workaround at this time. |
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Resolution |
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========== |
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All NSS users should upgrade to the latest version: |
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# emerge --sync |
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# emerge --ask --oneshot --verbose ">=dev-libs/nss-3.11.3" |
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|
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Note: As usual after updating a library, you should run |
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'revdep-rebuild' (from the app-portage/gentoolkit package) to ensure |
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that all applications linked to it are properly rebuilt. |
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|
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References |
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========== |
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|
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[ 1 ] CVE-2006-4339 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-4339 |
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[ 2 ] CVE-2006-4340 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-4340 |
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|
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Availability |
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============ |
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This GLSA and any updates to it are available for viewing at |
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the Gentoo Security Website: |
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http://security.gentoo.org/glsa/glsa-200610-06.xml |
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Concerns? |
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========= |
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Security is a primary focus of Gentoo Linux and ensuring the |
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confidentiality and security of our users machines is of utmost |
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importance to us. Any security concerns should be addressed to |
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security@g.o or alternatively, you may file a bug at |
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http://bugs.gentoo.org. |
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License |
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======= |
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|
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Copyright 2006 Gentoo Foundation, Inc; referenced text |
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belongs to its owner(s). |
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|
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The contents of this document are licensed under the |
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Creative Commons - Attribution / Share Alike license. |
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|
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http://creativecommons.org/licenses/by-sa/2.5 |
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