Improper input validation in OpenSSL
CVE-2016-6305
The ssl3_read_bytes function in record/rec_layer_s3.c in OpenSSL 1.1.0 before 1.1.0a allows remote attackers to cause a denial of service (infinite loop) by triggering a zero-length record in an SSL_peek call.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.160 (96.8th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 97th percentile — 96.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.160 · newest: 0.160 · change: 0.000
Affected products
- OpenSSL — versions 1.1.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.openssl.org/news/secadv/20160922.txt (Vendor Advisory)
- www.tenable.com/security/tns-2016-20
- www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html
- www.securitytracker.com/id/1036879 (vdb-entry)
- security.gentoo.org/glsa/201612-16 (vendor-advisory)
- git.openssl.org/
- www-01.ibm.com/support/docview.wss
- www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.html
- www.tenable.com/security/tns-2016-16
- www.tenable.com/security/tns-2016-21
Frequently asked questions
- What is CVE-2016-6305?
- CVE-2016-6305 is a high-severity vulnerability in OpenSSL, classified under Improper Input Validation. CVSS score: 7.5/10. Published 2016-09-26.
- How severe is CVE-2016-6305?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2016-6305 known to be exploited?
- 7 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.