CVE-2017-3738

 

Published at: - 07-12-2017 05:29

Last modified: - 19-08-2022 01:49

Total changes: - 2

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.

Common Vulnerability Scoring System (CVSS)

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

 

Verification logic

 

Reference

• https://www.openssl.org/news/secadv/20171207.txt
• 1039978-Third Party Advisory, VDB Entry
• https://security.netapp.com/advisory/ntap-20171208-0001/
• 102118-Third Party Advisory, VDB Entry
• FreeBSD-SA-17:12-Third Party Advisory
• https://nodejs.org/en/blog/vulnerability/december-2017-security-releases/
• GLSA-201712-03-Third Party Advisory
• DSA-4065-Third Party Advisory
• https://www.tenable.com/security/tns-2017-16
• http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html
• https://github.com/openssl/openssl/commit/e502cc86df9dafded1694fceb3228ee34d11c11a
• https://www.openssl.org/news/secadv/20180327.txt
• DSA-4157-Third Party Advisory
• RHSA-2018:0998-Third Party Advisory
• http://www.oracle.com/technetwork/security-advisory/cpuapr2018-3678067.html
• https://www.tenable.com/security/tns-2018-04
• https://www.tenable.com/security/tns-2018-07
• https://www.tenable.com/security/tns-2018-06
• RHSA-2018:2187-Third Party Advisory
• RHSA-2018:2186-Third Party Advisory
• RHSA-2018:2185-Third Party Advisory
• http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html
• https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbst03881en_us
• http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html
• https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html
• https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html
• https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html

 

Keywords

NVD

 

CVE-2017-3738

 

CVE

 

Common vulnerabilities & exposures

 

CVSS

 

Common vulnerability scoring system

 

Security

 

Vulnerabilities

 

Exposures