vulnwire
5.9med

CVE-2017-3732

BN_mod_exp may produce incorrect results on x86_64

Published 9 y ago · modified 4 mo ago · JSON

CVSS
5.9
v3.1 · NVD
CISA KEV
No
not known exploited
EPSS
15.4%
percentile 97%
Public exploits
0
none known

There is a carry propagating bug in the x86_64 Montgomery squaring procedure in OpenSSL 1.0.2 before 1.0.2k and 1.1.0 before 1.1.0d. 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. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem.

Exploit prediction (EPSS)

15.40% probability of exploitation in the next 30 days, higher than 97% of all scored CVEs.

CVSS scores

Assigned byVersionScoreVector
NVD3.15.9CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
NVD2.04.3AV:N/AC:M/Au:N/C:P/I:N/A:N

Affected products

  • OpenSSL OpenSSL

Classification

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

References

  • access.redhat.com /errata/RHSA-2018:2185 · vendor-advisory, x_refsource_REDHAT, x_transferred
  • access.redhat.com /errata/RHSA-2018:2186 · vendor-advisory, x_refsource_REDHAT, 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
  • github.com /openssl/openssl/commit/a59b90bf491410f1f2bc4540cc21f1980fd14c5b · x_refsource_MISC, x_transferred
  • security.freebsd.org /advisories/FreeBSD-SA-17:02.openssl.asc · vendor-advisory, x_refsource_FREEBSD, x_transferred
  • openssl.org /news/secadv/20170126.txt · x_refsource_CONFIRM, x_transferred
  • securitytracker.com /id/1037717 · vdb-entry, x_refsource_SECTRACK, x_transferred
  • access.redhat.com /errata/RHSA-2018:2575 · vendor-advisory, x_refsource_REDHAT, x_transferred
  • oracle.com /technetwork/security-advisory/cpuoct2017-3236626.html · x_refsource_CONFIRM, x_transferred
  • tenable.com /security/tns-2017-04 · x_refsource_CONFIRM, x_transferred
  • security.gentoo.org /glsa/201702-07 · vendor-advisory, x_refsource_GENTOO, x_transferred
  • access.redhat.com /errata/RHSA-2018:2568 · vendor-advisory, x_refsource_REDHAT, x_transferred
  • securityfocus.com /bid/95814 · vdb-entry, x_refsource_BID, x_transferred
  • oracle.com /technetwork/security-advisory/cpujul2017-3236622.html · x_refsource_CONFIRM, x_transferred
  • support.hpe.com /hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03838en_us · x_refsource_CONFIRM, x_transferred
  • access.redhat.com /errata/RHSA-2018:2187 · vendor-advisory, x_refsource_REDHAT, x_transferred
  • oracle.com /technetwork/security-advisory/cpuapr2019-5072813.html · x_refsource_MISC, x_transferred

Sources

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