Information disclosure in Nodejs Node.js
CVE-2017-3738
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.
Vulnerability class: Information Disclosure
EPSS: 0.134 (96.0th percentile) — read the EPSS interpretation.
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.
Affected products
- Nodejs Node.js
- Openssl — versions 1.0.2, 1.0.2a, 1.0.2b
- Openssl Software Foundation — versions 1.0.2-1.02m, 1.1.0-1.1.0g
- Debian Debian_linux — versions 8.0, 9.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- openssl-security@openssl.org (x_refsource_CONFIRM, Third Party Advisory)
- openssl-security@openssl.org (x_refsource_CONFIRM, Third Party Advisory)
- openssl-security@openssl.org (x_refsource_REDHAT, vendor-advisory, Third Party Advisory)
- openssl-security@openssl.org (x_refsource_REDHAT, vendor-advisory, Third Party Advisory)
- openssl-security@openssl.org (x_refsource_CONFIRM, Patch, Third Party Advisory)
- openssl-security@openssl.org (x_refsource_CONFIRM, Patch, Third Party Advisory)
- openssl-security@openssl.org (x_refsource_CONFIRM, Patch, Third Party Advisory)
- openssl-security@openssl.org (x_refsource_FREEBSD, vendor-advisory, Third Party Advisory)
- openssl-security@openssl.org (vendor-advisory, Third Party Advisory, x_refsource_GENTOO)
- openssl-security@openssl.org (VDB Entry, Third Party Advisory, vdb-entry, x_refsource_SECTRACK)
Frequently asked questions
- What is CVE-2017-3738?
- CVE-2017-3738 is a medium-severity vulnerability in Nodejs Node.js, classified under Information Disclosure. CVSS score: 5.9/10. Published 2017-12-07.
- How severe is CVE-2017-3738?
- Medium severity. CVSS v3 base score is 5.9 out of 10.
- Is CVE-2017-3738 known to be exploited?
- 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.