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Vulnerability details: VCID-a12s-yyr4-aaad
Vulnerability ID VCID-a12s-yyr4-aaad
Aliases CVE-2016-2181
VC-OPENSSL-20160819-CVE-2016-2181
Summary 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.
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (2)
CWE-189 Numeric Errors
CWE-20 Improper Input Validation
System Score Found at
generic_textual Low http://people.canonical.com/~ubuntu-security/cve/2016/CVE-2016-2181.html
rhas Important https://access.redhat.com/errata/RHSA-2016:1940
cvssv3 5.9 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2016-2181.json
epss 0.0819 https://api.first.org/data/v1/epss?cve=CVE-2016-2181
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rhbs medium https://bugzilla.redhat.com/show_bug.cgi?id=1369113
generic_textual Low https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-2177
generic_textual Low https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-2178
generic_textual Low https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-2179
generic_textual Low https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-2180
generic_textual Low https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-2181
generic_textual Low https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-2182
generic_textual Low https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-6302
generic_textual Medium https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-6303
generic_textual High https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-6304
generic_textual Medium https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-6306
cvssv2 2.6 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv2 5.0 https://nvd.nist.gov/vuln/detail/CVE-2016-2181
cvssv3 7.5 https://nvd.nist.gov/vuln/detail/CVE-2016-2181
archlinux High https://security.archlinux.org/AVG-29
archlinux High https://security.archlinux.org/AVG-30
generic_textual Medium https://ubuntu.com/security/notices/USN-3087-1
generic_textual Low https://www.openssl.org/news/secadv/20160922.txt
cvssv3.1 9.8 http://www.oracle.com/technetwork/security-advisory/cpuapr2018-3678067.html
generic_textual CRITICAL http://www.oracle.com/technetwork/security-advisory/cpuapr2018-3678067.html
cvssv3.1 7.5 http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html
generic_textual HIGH http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html
cvssv3.1 9.8 http://www.oracle.com/technetwork/security-advisory/cpujul2017-3236622.html
generic_textual CRITICAL http://www.oracle.com/technetwork/security-advisory/cpujul2017-3236622.html
cvssv3.1 8.1 http://www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.html
generic_textual HIGH http://www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.html
cvssv3.1 7.5 http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html
generic_textual HIGH http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html
cvssv3.1 5.3 http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2016-3090545.html
generic_textual MODERATE http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2016-3090545.html
Reference id Reference type URL
http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10759
http://lists.opensuse.org/opensuse-security-announce/2016-09/msg00022.html
http://lists.opensuse.org/opensuse-security-announce/2016-09/msg00023.html
http://lists.opensuse.org/opensuse-security-announce/2016-09/msg00024.html
http://lists.opensuse.org/opensuse-security-announce/2016-09/msg00031.html
http://lists.opensuse.org/opensuse-security-announce/2016-10/msg00005.html
http://lists.opensuse.org/opensuse-security-announce/2016-10/msg00011.html
http://lists.opensuse.org/opensuse-security-announce/2016-10/msg00012.html
http://lists.opensuse.org/opensuse-security-announce/2016-10/msg00029.html
http://lists.opensuse.org/opensuse-security-announce/2017-10/msg00010.html
http://lists.opensuse.org/opensuse-security-announce/2017-10/msg00011.html
http://lists.opensuse.org/opensuse-security-announce/2018-02/msg00032.html
http://people.canonical.com/~ubuntu-security/cve/2016/CVE-2016-2181.html
http://rhn.redhat.com/errata/RHSA-2016-1940.html
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2016-2181.json
https://api.first.org/data/v1/epss?cve=CVE-2016-2181
https://bto.bluecoat.com/security-advisory/sa132
https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-2177
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-2178
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-2179
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-2180
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-2181
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-2182
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-6302
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-6303
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-6304
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-6306
http://seclists.org/fulldisclosure/2017/Jul/31
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://github.com/openssl/openssl/commit/3884b47b7c255c2e94d9b387ee83c7e8bb981258
https://github.com/openssl/openssl/commit/b77ab018b79a00f789b0fb85596b446b08be4c9d
https://git.openssl.org/?p=openssl.git%3Ba=commit%3Bh=1fb9fdc3027b27d8eb6a1e6a846435b070980770
https://git.openssl.org/?p=openssl.git;a=commit;h=1fb9fdc3027b27d8eb6a1e6a846435b070980770
https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA40312
https://kc.mcafee.com/corporate/index?page=content&id=SB10215
https://security.FreeBSD.org/advisories/FreeBSD-SA-16:26.openssl.asc
https://support.f5.com/csp/article/K59298921
https://ubuntu.com/security/notices/USN-3087-1
https://www.arista.com/en/support/advisories-notices/security-advisories/1749-security-advisory-24
https://www.openssl.org/news/secadv/20160922.txt
https://www.tenable.com/security/tns-2016-16
https://www.tenable.com/security/tns-2016-20
https://www.tenable.com/security/tns-2016-21
http://www-01.ibm.com/support/docview.wss?uid=swg21995039
http://www.debian.org/security/2016/dsa-3673
http://www.huawei.com/en/psirt/security-advisories/huawei-sa-20170322-01-openssl-en
http://www.oracle.com/technetwork/security-advisory/cpuapr2018-3678067.html
http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html
http://www.oracle.com/technetwork/security-advisory/cpujul2017-3236622.html
http://www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.html
http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html
http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2016-3090545.html
http://www.oracle.com/technetwork/topics/security/ovmbulletinoct2016-3090547.html
http://www.securityfocus.com/bid/92982
http://www.securitytracker.com/id/1036690
http://www.splunk.com/view/SP-CAAAPSV
http://www.splunk.com/view/SP-CAAAPUE
http://www.ubuntu.com/usn/USN-3087-1
http://www.ubuntu.com/usn/USN-3087-2
1369113 https://bugzilla.redhat.com/show_bug.cgi?id=1369113
ASA-201609-23 https://security.archlinux.org/ASA-201609-23
ASA-201609-24 https://security.archlinux.org/ASA-201609-24
AVG-29 https://security.archlinux.org/AVG-29
AVG-30 https://security.archlinux.org/AVG-30
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cpe:2.3:a:openssl:openssl:1.0.2f:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:openssl:openssl:1.0.2f:*:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:1.0.2g:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:openssl:openssl:1.0.2g:*:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:1.0.2h:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:openssl:openssl:1.0.2h:*:*:*:*:*:*:*
cpe:2.3:o:oracle:linux:6:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:oracle:linux:6:*:*:*:*:*:*:*
cpe:2.3:o:oracle:linux:7:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:oracle:linux:7:*:*:*:*:*:*:*
CVE-2016-2181 https://nvd.nist.gov/vuln/detail/CVE-2016-2181
RHSA-2016:1940 https://access.redhat.com/errata/RHSA-2016:1940
USN-3087-1 https://usn.ubuntu.com/3087-1/
No exploits are available.
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2016-2181.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: AV:N/AC:H/Au:N/C:N/I:N/A:P Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P Found at https://nvd.nist.gov/vuln/detail/CVE-2016-2181
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2016-2181
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Found at http://www.oracle.com/technetwork/security-advisory/cpuapr2018-3678067.html
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N Found at http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Found at http://www.oracle.com/technetwork/security-advisory/cpujul2017-3236622.html
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H Found at http://www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.html
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N Found at http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N Found at http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2016-3090545.html
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.91762
EPSS Score 0.0819
Published At May 1, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
There are no relevant records.