CVE-2017-3738

Impact:
Low
Public Date:
2017-12-07
CWE:
CWE-190
Bugzilla:
1523510: CVE-2017-3738 openssl: rsaz_1024_mul_avx2 overflow bug on x86_64

The MITRE CVE dictionary describes this issue as:

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.

Find out more about CVE-2017-3738 from the MITRE CVE dictionary dictionary and NIST NVD.

CVSS v3 metrics

CVSS3 Base Score 5.9
CVSS3 Base Metrics CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack Vector Network
Attack Complexity High
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity Impact None
Availability Impact None

Red Hat Security Errata

Platform Errata Release Date
Red Hat JBoss Core Services on RHEL 7 Server RHSA-2018:2185 2018-07-12
Red Hat Enterprise Linux 7 (openssl) RHSA-2018:0998 2018-04-10
Red Hat JBoss Core Services 1 RHSA-2018:2187 2018-07-12
Red Hat JBoss Core Services on RHEL 6 Server RHSA-2018:2186 2018-07-12

Affected Packages State

Platform Package State
Red Hat JBoss Web Server 3.0 openssl Will not fix
Red Hat JBoss Web Server 3 openssl Affected
Red Hat JBoss EWS 2 openssl Will not fix
Red Hat JBoss EAP 6 openssl Will not fix
Red Hat JBoss EAP 5 openssl Under investigation
Red Hat Enterprise Linux 7 openssl098e Not affected
Red Hat Enterprise Linux 7 OVMF Not affected
Red Hat Enterprise Linux 6 openssl Not affected
Red Hat Enterprise Linux 6 openssl098e Not affected
Red Hat Enterprise Linux 5 openssl097a Not affected
Red Hat Enterprise Linux 5 openssl Not affected
RHEV Manager 3 mingw-virt-viewer Not affected

External References

Last Modified

CVE description copyright © 2017, The MITRE Corporation

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