vulnwire
6.5med

CVE-2017-3736

There is a carry propagating bug in the x86_64 Montgomery squaring procedure in OpenSSL before 1.0.2m and 1.1.0 before 1.1.0g.

Published 9 y ago · modified 4 mo ago · JSON

CVSS
6.5
v3.0 · NVD
CISA KEV
No
not known exploited
EPSS
10.1%
percentile 96%
Public exploits
0
none known

There is a carry propagating bug in the x86_64 Montgomery squaring procedure in OpenSSL before 1.0.2m and 1.1.0 before 1.1.0g. 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 DH are considered just feasible (although very difficult) 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 very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen.

Exploit prediction (EPSS)

10.13% probability of exploitation in the next 30 days, higher than 96% of all scored CVEs.

CVSS scores

Assigned byVersionScoreVector
NVD3.06.5CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
NVD2.04.0AV:N/AC:L/Au:S/C:P/I:N/A:N

Affected products

  • OpenSSL Software Foundation OpenSSL

Classification

Weakness
  • CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
Technology feeds
OpenSSL (RSS, critical only)

References

  • security.netapp.com /advisory/ntap-20171107-0002/ · x_refsource_CONFIRM, x_transferred
  • access.redhat.com /errata/RHSA-2018:2185 · vendor-advisory, x_refsource_REDHAT, x_transferred
  • github.com /openssl/openssl/commit/4443cf7aa0099e5ce615c18cee249fff77fb0871 · x_refsource_MISC, x_transferred
  • access.redhat.com /errata/RHSA-2018:2186 · vendor-advisory, x_refsource_REDHAT, x_transferred
  • oracle.com /technetwork/security-advisory/cpujul2018-4258247.html · x_refsource_CONFIRM, x_transferred
  • oracle.com /technetwork/security-advisory/cpujan2018-3236628.html · x_refsource_CONFIRM, x_transferred
  • access.redhat.com /errata/RHSA-2018:2713 · vendor-advisory, x_refsource_REDHAT, x_transferred
  • oracle.com /technetwork/security-advisory/cpujan2019-5072801.html · x_refsource_CONFIRM, x_transferred
  • debian.org /security/2017/dsa-4018 · vendor-advisory, x_refsource_DEBIAN, x_transferred
  • security.gentoo.org /glsa/201712-03 · vendor-advisory, x_refsource_GENTOO, x_transferred
  • access.redhat.com /errata/RHSA-2018:0998 · vendor-advisory, x_refsource_REDHAT, x_transferred
  • access.redhat.com /errata/RHSA-2018:2575 · vendor-advisory, x_refsource_REDHAT, x_transferred
  • tenable.com /security/tns-2017-15 · x_refsource_CONFIRM, x_transferred
  • oracle.com /technetwork/security-advisory/cpuapr2018-3678067.html · x_refsource_CONFIRM, x_transferred
  • securityfocus.com /bid/101666 · vdb-entry, x_refsource_BID, x_transferred
  • access.redhat.com /errata/RHSA-2018:2568 · vendor-advisory, x_refsource_REDHAT, x_transferred
  • openssl.org /news/secadv/20171102.txt · x_refsource_CONFIRM, x_transferred
  • oracle.com /technetwork/security-advisory/cpuoct2018-4428296.html · x_refsource_CONFIRM, x_transferred
  • debian.org /security/2017/dsa-4017 · vendor-advisory, x_refsource_DEBIAN, x_transferred
  • tenable.com /security/tns-2017-14 · x_refsource_CONFIRM, x_transferred
  • security.freebsd.org /advisories/FreeBSD-SA-17:11.openssl.asc · vendor-advisory, x_refsource_FREEBSD, x_transferred
  • securitytracker.com /id/1039727 · vdb-entry, x_refsource_SECTRACK, x_transferred
  • support.hpe.com /hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbst03881en_us · x_refsource_CONFIRM, x_transferred
  • access.redhat.com /errata/RHSA-2018:2187 · vendor-advisory, x_refsource_REDHAT, x_transferred
  • security.netapp.com /advisory/ntap-20180117-0002/ · x_refsource_CONFIRM, x_transferred
  • oracle.com /technetwork/security-advisory/cpuapr2019-5072813.html · x_refsource_MISC, x_transferred
  • oracle.com /technetwork/security-advisory/cpujul2019-5072835.html · x_refsource_MISC, x_transferred

Sources

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