CVE - CVE-2017-3738

CVE-ID
CVE-2017-3738	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
There is an overflow bug in the AVX2 Montgomery multiplication procedure used in exponentiation with 1024-bit moduli. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH1024 are considered just feasible, because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be significant. However, for an attack on TLS to be meaningful, the server would have to share the DH1024 private key among multiple clients, which is no longer an option since CVE-2016-0701. This only affects processors that support the AVX2 but not ADX extensions like Intel Haswell (4th generation). Note: The impact from this issue is similar to CVE-2017-3736, CVE-2017-3732 and CVE-2015-3193. OpenSSL version 1.0.2-1.0.2m and 1.1.0-1.1.0g are affected. Fixed in OpenSSL 1.0.2n. Due to the low severity of this issue we are not issuing a new release of OpenSSL 1.1.0 at this time. The fix will be included in OpenSSL 1.1.0h when it becomes available. The fix is also available in commit e502cc86d in the OpenSSL git repository.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://github.com/openssl/openssl/commit/e502cc86df9dafded1694fceb3228ee34d11c11a CONFIRM:https://www.openssl.org/news/secadv/20171207.txt CONFIRM:https://security.netapp.com/advisory/ntap-20171208-0001/ CONFIRM:https://nodejs.org/en/blog/vulnerability/december-2017-security-releases/ CONFIRM:https://www.tenable.com/security/tns-2017-16 CONFIRM:http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html CONFIRM:https://www.openssl.org/news/secadv/20180327.txt CONFIRM:http://www.oracle.com/technetwork/security-advisory/cpuapr2018-3678067.html CONFIRM:https://www.tenable.com/security/tns-2018-04 CONFIRM:https://www.tenable.com/security/tns-2018-06 CONFIRM:https://www.tenable.com/security/tns-2018-07 CONFIRM:http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html CONFIRM:https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbst03881en_us CONFIRM:http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html DEBIAN:DSA-4065 URL:https://www.debian.org/security/2017/dsa-4065 DEBIAN:DSA-4157 URL:https://www.debian.org/security/2018/dsa-4157 FREEBSD:FreeBSD-SA-17:12 URL:https://security.FreeBSD.org/advisories/FreeBSD-SA-17:12.openssl.asc GENTOO:GLSA-201712-03 URL:https://security.gentoo.org/glsa/201712-03 REDHAT:RHSA-2018:0998 URL:https://access.redhat.com/errata/RHSA-2018:0998 REDHAT:RHSA-2018:2185 URL:https://access.redhat.com/errata/RHSA-2018:2185 REDHAT:RHSA-2018:2186 URL:https://access.redhat.com/errata/RHSA-2018:2186 REDHAT:RHSA-2018:2187 URL:https://access.redhat.com/errata/RHSA-2018:2187 BID:102118 URL:http://www.securityfocus.com/bid/102118 SECTRACK:1039978 URL:http://www.securitytracker.com/id/1039978
Assigning CNA
OpenSSL Software Foundation
Date Entry Created
20161216	Disclaimer: The entry creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20161216)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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