Vulnerability in OpenSSL
CVE-2016-2179
The DTLS implementation in OpenSSL before 1.1.0 does not properly restrict the lifetime of queue entries associated with unused out-of-order messages, which allows remote attackers to cause a denial of service (memory consumption) by maintaining many crafted DTLS sessions simultaneously, related to d1_lib.c, statem_dtls.c, statem_lib.c, and statem_srvr.c.
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: 0.266 (98.0th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 98th percentile — 98.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.266 · newest: 0.266 · change: 0.000
Affected products
- OpenSSL — versions 1.0.1, 1.0.1a, 1.0.1b
- Oracle Linux — versions 6, 7
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.tenable.com/security/tns-2016-20
- www.splunk.com/view/SP-CAAAPUE (Third Party Advisory)
- www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html
- rhn.redhat.com/errata/RHSA-2016-1940.html (vendor-advisory)
- www.oracle.com/technetwork/topics/security/linuxbulletinoct2016-3090545.html (Third Party Advisory)
- kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA40312 (Third Party Advisory)
- support.hpe.com/hpsc/doc/public/display
- www.splunk.com/view/SP-CAAAPSV (Third Party Advisory)
- www-01.ibm.com/support/docview.wss (Third Party Advisory)
- www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.html (Third Party Advisory)
Frequently asked questions
- What is CVE-2016-2179?
- CVE-2016-2179 is a high-severity vulnerability in OpenSSL, classified under CWE-399. CVSS score: 7.5/10. Published 2016-09-16.
- How severe is CVE-2016-2179?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2016-2179 known to be exploited?
- 5 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.