Information disclosure in Node.js
CVE-2017-3732
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.
Vulnerability class: Information Disclosure
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.154 (96.7th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 97th percentile — 96.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.154 · newest: 0.154 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- access.redhat.com/errata/RHSA-2018:2185 (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2018:2186 (vendor-advisory, Third Party Advisory)
- www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html (Patch, Third Party Advisory)
- access.redhat.com/errata/RHSA-2018:2713 (vendor-advisory, Third Party Advisory)
- github.com/openssl/openssl/commit/a59b90bf491410f1f2bc4540cc21f1980fd14c5b (Patch)
- security.FreeBSD.org/advisories/FreeBSD-SA-17:02.openssl.asc (vendor-advisory, Third Party Advisory)
- www.openssl.org/news/secadv/20170126.txt (Vendor Advisory)
- www.securitytracker.com/id/1037717 (VDB Entry, Third Party Advisory, vdb-entry)
- access.redhat.com/errata/RHSA-2018:2575 (vendor-advisory, Third Party Advisory)
- www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2017-3732?
- CVE-2017-3732 is a medium-severity vulnerability in Node.js, classified under Information Disclosure. CVSS score: 5.9/10. Published 2017-05-04.
- How severe is CVE-2017-3732?
- Medium severity. CVSS v3 base score is 5.9 out of 10.
- Is CVE-2017-3732 known to be exploited?
- 5 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.