Bug 802725 (CVE-2012-0884)
| Summary: | CVE-2012-0884 openssl: CMS and PKCS#7 Bleichenbacher attack | ||
|---|---|---|---|
| Product: | [Other] Security Response | Reporter: | Jan Lieskovsky <jlieskov> |
| Component: | vulnerability | Assignee: | Red Hat Product Security <security-response-team> |
| Status: | CLOSED ERRATA | QA Contact: | |
| Severity: | low | Docs Contact: | |
| Priority: | low | ||
| Version: | unspecified | CC: | anande, mvadkert, tmraz, wnefal+redhatbugzilla |
| Target Milestone: | --- | Keywords: | Security |
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | openssl 0.9.8u, openssl 1.0.0h | Doc Type: | Bug Fix |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2012-09-25 07:59:08 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
| Bug Depends On: | 802816, 802817, 802820, 804550, 804551, 804552, 804553 | ||
| Bug Blocks: | 802502 | ||
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Description
Jan Lieskovsky
2012-03-13 10:56:00 UTC
Upstream commits: http://cvs.openssl.org/chngview?cn=22238 0.9.8 http://cvs.openssl.org/chngview?cn=22228 1.0.0 http://cvs.openssl.org/chngview?cn=22251 trunk Cryptographic Message Syntax (CMS) support is only available in openssl packages in Red Hat Enterprise Linux 6, earlier openssl packages are not affected by that part of the problem. Created mingw32-openssl tracking bugs for this issue Affects: fedora-all [bug 802817] Affects: epel-5 [bug 802820] Created openssl tracking bugs for this issue Affects: fedora-all [bug 802816] External Reference: http://www.openssl.org/news/secadv_20120312.txt This issue has been addressed in following products: Red Hat Enterprise Linux 5 Red Hat Enterprise Linux 6 Via RHSA-2012:0426 https://rhn.redhat.com/errata/RHSA-2012-0426.html openssl-1.0.0h-1.fc16 has been pushed to the Fedora 16 stable repository. If problems still persist, please make note of it in this bug report. openssl-1.0.0h-1.fc15 has been pushed to the Fedora 15 stable repository. If problems still persist, please make note of it in this bug report. openssl-1.0.0h-1.fc16 has been pushed to the Fedora 16 stable repository. If problems still persist, please make note of it in this bug report. openssl-1.0.0h-1.fc17 has been pushed to the Fedora 17 stable repository. If problems still persist, please make note of it in this bug report. Alexander Peslyak pointed out: [3] http://www.openwall.com/lists/oss-security/2012/05/11/5 a deficiency in the original CVE-2012-0884 upstream fix, which is currently believed to be mostly of non-security relevance (more from [3]): ================================================================ This is just a heads up that OpenSSL 1.0.1c, 1.0.0j, and 0.9.8x fix an additional issue that is believed to have only little/potential security relevance in obscure cases and thus is being treated as a non-security fix currently - yet is desirable to include in backports of distros that make those instead of simply upgrading. Here's the fix, by Stephen Henson of the OpenSSL core team: "Make sure tkeylen is initialised properly when encrypting CMS messages." http://cvs.openssl.org/chngview?cn=22537 or with an additional compiler warning fix: http://cvs.openssl.org/filediff?f=openssl/crypto/cms/cms_enc.c&v1=1.11&v2=1.13 (Note: the "tkeylen = 0" portion is just to silence a possible compiler warning; the actual fix is to the code.) The bug had been introduced in: "Fix for CMS/PKCS7 MMA. If RSA decryption fails use a random key and continue with symmetric decryption process to avoid leaking timing information to an attacker." http://cvs.openssl.org/chngview?cn=22251 and more specifically in this portion: http://cvs.openssl.org/filediff?f=openssl/crypto/cms/cms_enc.c&v1=1.10&v2=1.11 which introduced the tkey and tkeylen variables. This issue has been addressed in following products: JBoss Enterprise Application Platform 6.0.0 Via RHSA-2012:1308 https://rhn.redhat.com/errata/RHSA-2012-1308.html This issue has been addressed in following products: JBoss Enterprise Application Platform 5.1.2 Via RHSA-2012:1307 https://rhn.redhat.com/errata/RHSA-2012-1307.html This issue has been addressed in following products: JBoss Enterprise Web Server 1.0.2 Via RHSA-2012:1306 https://rhn.redhat.com/errata/RHSA-2012-1306.html |