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OpenSSL CVE-2016-0705

CRITICAL
2016-03-03 secalert@redhat.com
9.8
CVSS 3.0 · NVD
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Vulnerability Assessment

Impact

CVSS score of 9.8 (CRITICAL). Attack characteristics: network attack vector, low complexity, no privileges required, no user interaction not required. EPSS exploitation probability: 20.66%.

Exploit ScenarioDerived

This vulnerability can be exploited remotely over the network. Successful exploitation could compromise the critical-severity affected system.

Act Now Prioritize within 24-48h. Why: CRITICAL severity.
Patch available 20.7% exploitation probability (EPSS)

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AnalysisAI

Double free vulnerability in the dsa_priv_decode function in crypto/dsa/dsa_ameth.c in OpenSSL 1.0.1 before 1.0.1s and 1.0.2 before 1.0.2g allows remote attackers to cause a denial of service (memory. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Epss exploitation probability 20.7%.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

Double free vulnerability in the dsa_priv_decode function in crypto/dsa/dsa_ameth.c in OpenSSL 1.0.1 before 1.0.1s and 1.0.2 before 1.0.2g allows remote attackers to cause a denial of service (memory corruption) or possibly have unspecified other impact via a malformed DSA private key. Affected products include: Oracle Mysql, Openssl, Google Android, Canonical Ubuntu Linux, Debian Debian Linux. Version information: before 1.0.1.

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 9.8 CRITICAL
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

DescriptionCVE.org

Double free vulnerability in the dsa_priv_decode function in crypto/dsa/dsa_ameth.c in OpenSSL 1.0.1 before 1.0.1s and 1.0.2 before 1.0.2g allows remote attackers to cause a denial of service (memory corruption) or possibly have unspecified other impact via a malformed DSA private key.

Threat Intelligence Overview

EPSS Score
20.7%
Top 4% exploitable
Data Quality
3 sources
Confidence: Low

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity CRITICAL
CISA KEV No
Public POC No
EPSS 20.7%
Patch available Yes
Active threat No
Deciding rule
CRITICAL severity
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation· derived
None
System Exposure· derived
Open
Automatable· derived
Yes
Human Impact· derived
Medium

Priority Score

70
Low Medium High Critical
KEV: 0
EPSS: +21
CVSS: +49
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

A buffer overflow occurs when a program writes more data to a memory buffer than it was allocated to hold, causing the excess data to spill into adjacent memory regions.

Denial of Service attacks render applications or systems unavailable by overwhelming resources or triggering failure conditions.

Affected Products (CPE)CVE.org

cpe:2.3:a:oracle:mysql:*:*:*:*:*:*:*:*
cpe:2.3:a:oracle:mysql:*:*:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:1.0.1:*:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:1.0.1:beta1:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:1.0.1:beta2:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:1.0.1:beta3:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:1.0.1a:*:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:1.0.1b:*:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:1.0.1c:*:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:1.0.1d:*:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:1.0.1e:*:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:1.0.1f:*:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:1.0.1g:*:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:1.0.1h:*:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:1.0.1i:*:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:1.0.1j:*:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:1.0.1k:*:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:1.0.1l:*:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:1.0.1m:*:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:1.0.1n:*:*:*:*:*:*:*
+ 41 more
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7.3 Jun 21

In addition to the c_rehash shell command injection identified in CVE-2022-1292, further circumstances where the c_rehas

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CVE-2016-2107 MEDIUM POC
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The AES-NI implementation in OpenSSL before 1.0.1t and 1.0.2 before 1.0.2h does not consider memory allocation during a

CVE-2015-1793 MEDIUM POC
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CVE-2022-3602 HIGH
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A buffer overrun can be triggered in X.509 certificate verification, specifically in name constraint checking. Rated hig

References

Advisories & patches
PATCH http://www.oracle.com/technetwork/security-advisory/cpuapr2016v3-2985753.html PATCH http://www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.html ADVISORY http://openssl.org/news/secadv/20160301.txt ADVISORY http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html ADVISORY http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html ADVISORY https://security.FreeBSD.org/advisories/FreeBSD-SA-16:12.openssl.asc ADVISORY https://www.openssl.org/news/secadv/20160301.txt REF http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10759 REF http://lists.fedoraproject.org/pipermail/package-announce/2016-March/178358.html REF http://lists.fedoraproject.org/pipermail/package-announce/2016-March/178817.html REF http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00001.html REF http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00002.html REF http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00003.html REF http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00004.html REF http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00005.html REF http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00006.html REF http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00007.html REF http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00009.html REF http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00010.html REF http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00038.html REF http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00053.html REF http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00019.html REF http://marc.info/?l=bugtraq&m=145889460330120&w=2 REF http://marc.info/?l=bugtraq&m=145983526810210&w=2 REF http://marc.info/?l=bugtraq&m=146108058503441&w=2 REF http://rhn.redhat.com/errata/RHSA-2016-2957.html REF http://source.android.com/security/bulletin/2016-05-01.html REF http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160302-openssl REF http://www.debian.org/security/2016/dsa-3500 REF http://www.securityfocus.com/bid/83754 REF http://www.securityfocus.com/bid/91787 REF http://www.securitytracker.com/id/1035133 REF http://www.ubuntu.com/usn/USN-2914-1 REF https://access.redhat.com/errata/RHSA-2018:2568 REF https://access.redhat.com/errata/RHSA-2018:2575 REF https://access.redhat.com/errata/RHSA-2018:2713 REF https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf REF https://git.openssl.org/?p=openssl.git%3Ba=commit%3Bh=6c88c71b4e4825c7bc0489306d062d017634eb88 REF https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03741en_us REF https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05052990 REF https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05068681 REF https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05086877 REF https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05111017 REF https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05126404 REF https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05131085 REF https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05135617 REF https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05141441 REF https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05150736 REF https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05150800 REF https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05150888 REF https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05158380 REF https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05176716 REF https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05301946 REF https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05376917 REF https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05390722 REF https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA40168 REF https://security.gentoo.org/glsa/201603-15

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