CVE-2017-3738

openssl: rsaz_1024_mul_avx2 overflow bug on x86_64

Published Dec 7, 2017 CVSS 3.1 · 5.9 Medium EPSS 13.4% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Debian DSA Debian DSA DSA-4065-1 openssl1.0 security update
Debian DSA Debian DSA DSA-4157-1 openssl security update
Ubuntu USN Ubuntu USN USN-3512-1 OpenSSL vulnerabilities
References
Link Providers
http://www.oracle.com/technetwork/security-advisory/cpuapr2018-3678067.html cve-icon cve-icon
http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html cve-icon cve-icon
http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html cve-icon cve-icon
http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html cve-icon cve-icon
http://www.securityfocus.com/bid/102118 cve-icon cve-icon
http://www.securitytracker.com/id/1039978 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2018:0998 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2018:2185 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2018:2186 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2018:2187 cve-icon cve-icon
https://github.com/openssl/openssl/commit/e502cc86df9dafded1694fceb3228ee34d11c11a cve-icon cve-icon
https://nodejs.org/en/blog/vulnerability/december-2017-security-releases/ cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2017-3738 cve-icon
https://security.FreeBSD.org/advisories/FreeBSD-SA-17:12.openssl.asc cve-icon cve-icon
https://security.gentoo.org/glsa/201712-03 cve-icon cve-icon
https://security.netapp.com/advisory/ntap-20171208-0001/ cve-icon cve-icon
https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbst03881en_us cve-icon cve-icon
https://www.cve.org/CVERecord?id=CVE-2017-3738 cve-icon
https://www.debian.org/security/2017/dsa-4065 cve-icon cve-icon
https://www.debian.org/security/2018/dsa-4157 cve-icon cve-icon
https://www.openssl.org/news/secadv/20171207.txt cve-icon cve-icon cve-icon
https://www.openssl.org/news/secadv/20180327.txt cve-icon cve-icon
https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html cve-icon cve-icon
https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html cve-icon cve-icon
https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html cve-icon cve-icon
https://www.tenable.com/security/tns-2017-16 cve-icon cve-icon
https://www.tenable.com/security/tns-2018-04 cve-icon cve-icon
https://www.tenable.com/security/tns-2018-06 cve-icon cve-icon
https://www.tenable.com/security/tns-2018-07 cve-icon cve-icon
History

No history.

Weaknesses

Sources

Status
PUBLISHED
Assigner
openssl
Published
Updated
Sep 16, 2024, 6:34 PM
Reserved
Dec 16, 2016, 12:00 AM
Status
Modified
Published
Dec 7, 2017, 4:29 PM
Modified
Jun 17, 2026, 1:18 AM
Severity
Low
Public date
Dec 7, 2017, 12:00 AM