Vulnerability in Openssl
CVE-2016-2181
The Anti-Replay feature in the DTLS implementation in OpenSSL before 1.1.0 mishandles early use of a new epoch number in conjunction with a large sequence number, which allows remote attackers to cause a denial of service (false-positive packet drops) via spoofed DTLS records, related to rec_layer_d1.c and ssl3_record.c.
EPSS: 0.226 (97.5th percentile) — read the EPSS interpretation.
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.
Affected products
- Openssl — versions 1.0.1, 1.0.1a, 1.0.1b
- Oracle Linux — versions 6, 7
- N/a — versions n/a
Weakness classification (CWE)
Public proof-of-concept exploits
References
- secalert@redhat.com (VDB Entry, Third Party Advisory, vdb-entry)
- secalert@redhat.com
- secalert@redhat.com (Third Party Advisory)
- secalert@redhat.com
- secalert@redhat.com (vendor-advisory)
- secalert@redhat.com (Third Party Advisory)
- secalert@redhat.com (Third Party Advisory)
- secalert@redhat.com (Third Party Advisory)
- secalert@redhat.com (Third Party Advisory)
- secalert@redhat.com (Third Party Advisory)
Frequently asked questions
- What is CVE-2016-2181?
- CVE-2016-2181 is a high-severity vulnerability in Openssl, classified under CWE-189. CVSS score: 7.5/10. Published 2016-09-16.
- How severe is CVE-2016-2181?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2016-2181 known to be exploited?
- 5 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.