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NVD / CVE Program· CNA redhat

CVE-2016-2178: The dsa_sign_setup function in crypto/dsa/dsa_ossl.c in OpenSSL through 1.0.2h does not properly ensure the use of constant-time operations…

MediumCVSS 5.5 · v3.1—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 22/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 1.2% (FIRST EPSS); higher than 69.6% of all records.
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: openssl (Alpine:v3.2) 1.0.2h-r1; openssl (Debian:12) 1.0.2i-1; openssl (Debian:7) 1.0.1t-1+deb7u1.

Low priority for now. Upgrade to openssl (Alpine:v3.2) 1.0.2h-r1; openssl (Debian:12) 1.0.2i-1; openssl (Debian:7) 1.0.1t-1+deb7u1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

The dsa_sign_setup function in crypto/dsa/dsa_ossl.c in OpenSSL through 1.0.2h does not properly ensure the use of constant-time operations, which makes it easier for local users to discover a DSA private key via a timing side-channel attack.

Published
Jun 19, 2016
Updated
Jun 16, 2026
EPSS
1.2% · 69th percentile

Report tools

JSON

Action score

22

Monitor

Low priority for now.

CVSS
22 / 40 · 5.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 1.2%

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
opensslopenssl
oraclelinux
oraclesolaris
suselinux enterprise
nodejsnode.js
debiandebian linux
canonicalubuntu linux

Check your server's TLS configuration

The OpenSSL version can't be seen from outside; the free SSL checker tests your certificate, enabled TLS versions and weak ciphers. Confirm the version on your server with the package manager.

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Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • nodejs node.js0.10.0 and later · before 0.10.47
  • nodejs node.js0.12.0 and later · before 0.12.16
  • nodejs node.js4.0.0 and later · up to 4.1.2 inclusive
  • nodejs node.js4.2.0 and later · before 4.6.0
  • nodejs node.js5.0.0 and later · before 6.7.0

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Alpine:v3.2opensslbefore 1.0.2h-r11.0.2h-r1
Debian:12opensslbefore 1.0.2i-11.0.2i-1
Debian:7opensslbefore 1.0.1t-1+deb7u11.0.1t-1+deb7u1
Debian:8opensslbefore 1.0.1t-1+deb8u41.0.1t-1+deb8u4
Red Hat:enterprise_linux:6::clientopensslbefore 0:1.0.1e-48.el6_8.30:1.0.1e-48.el6_8.3
Red Hat:enterprise_linux:6::clientopenssl-debuginfobefore 0:1.0.1e-48.el6_8.30:1.0.1e-48.el6_8.3
Red Hat:enterprise_linux:6::clientopenssl-develbefore 0:1.0.1e-48.el6_8.30:1.0.1e-48.el6_8.3
Red Hat:enterprise_linux:6::clientopenssl-perlbefore 0:1.0.1e-48.el6_8.30:1.0.1e-48.el6_8.3
Red Hat:enterprise_linux:6::clientopenssl-staticbefore 0:1.0.1e-48.el6_8.30:1.0.1e-48.el6_8.3
Red Hat:enterprise_linux:7::clientopensslbefore 1:1.0.1e-51.el7_2.71:1.0.1e-51.el7_2.7
Red Hat:enterprise_linux:7::clientopenssl-debuginfobefore 1:1.0.1e-51.el7_2.71:1.0.1e-51.el7_2.7
Red Hat:enterprise_linux:7::clientopenssl-develbefore 1:1.0.1e-51.el7_2.71:1.0.1e-51.el7_2.7
Red Hat:enterprise_linux:7::clientopenssl-libsbefore 1:1.0.1e-51.el7_2.71:1.0.1e-51.el7_2.7
Red Hat:enterprise_linux:7::clientopenssl-perlbefore 1:1.0.1e-51.el7_2.71:1.0.1e-51.el7_2.7
Red Hat:enterprise_linux:7::clientopenssl-staticbefore 1:1.0.1e-51.el7_2.71:1.0.1e-51.el7_2.7
Red Hat:jboss_core_services:1::el6jbcs-httpd24-httpdbefore 0:2.4.23-102.jbcs.el60:2.4.23-102.jbcs.el6
Red Hat:jboss_core_services:1::el6jbcs-httpd24-httpd-debuginfobefore 0:2.4.23-102.jbcs.el60:2.4.23-102.jbcs.el6
Red Hat:jboss_core_services:1::el6jbcs-httpd24-httpd-develbefore 0:2.4.23-102.jbcs.el60:2.4.23-102.jbcs.el6
Red Hat:jboss_core_services:1::el6jbcs-httpd24-httpd-manualbefore 0:2.4.23-102.jbcs.el60:2.4.23-102.jbcs.el6
Red Hat:jboss_core_services:1::el6jbcs-httpd24-httpd-selinuxbefore 0:2.4.23-102.jbcs.el60:2.4.23-102.jbcs.el6
Red Hat:jboss_core_services:1::el6jbcs-httpd24-httpd-src-zipbefore 0:2.4.23-102.jbcs.el60:2.4.23-102.jbcs.el6
Red Hat:jboss_core_services:1::el6jbcs-httpd24-httpd-toolsbefore 0:2.4.23-102.jbcs.el60:2.4.23-102.jbcs.el6
Red Hat:jboss_core_services:1::el6jbcs-httpd24-httpd-zipbefore 0:2.4.23-102.jbcs.el60:2.4.23-102.jbcs.el6
Red Hat:jboss_core_services:1::el6jbcs-httpd24-mod_auth_kerbbefore 0:5.4-35.jbcs.el60:5.4-35.jbcs.el6

+96

Same product

openssl: all records

Other highest-scoring records for the same primary product.

  • CVE-2014-0160The (1) TLS and (2) DTLS implementations in OpenSSL 1.0.1 before 1.0.1g do not properly handle Heartbeat Extension packets, which allows…KEV
    90Now
  • CVE-2021-3711SM2 Decryption Buffer Overflow
    65This week
  • CVE-2003-0545Double free vulnerability in OpenSSL 0.9.7 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code…
    65This week

Published before and after this one in the same product

  • ← EarlierCVE-2000-1254May 5, 2016 · crypto/rsa/rsa_gen.c in OpenSSL before 0.9.6 mishandles C bitwise-shift operations that exceed the size of an expression, which makes it…
    31Monitor
  • ← EarlierCVE-2016-2177Jun 19, 2016 · OpenSSL through 1.0.2h incorrectly uses pointer arithmetic for heap-buffer boundary checks, which might allow remote attackers to cause a…
    52Plan
  • Later →CVE-2016-2180Jul 31, 2016 · The TS_OBJ_print_bio function in crypto/ts/ts_lib.c in the X.509 Public Key Infrastructure Time-Stamp Protocol (TSP) implementation in…
    39Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
alpine:openssl1.0.2h-r1 · Alpine:v3.2Package registry (OSV)
debian:openssl1.0.2i-1 · Debian:12Package registry (OSV)
red hat:jbcs-httpd24-httpd0:2.4.23-102.jbcs.el6 · Red Hat:jboss_core_services:1::el6Package registry (OSV)
red hat:jbcs-httpd24-httpd-debuginfo0:2.4.23-102.jbcs.el6 · Red Hat:jboss_core_services:1::el6Package registry (OSV)
red hat:jbcs-httpd24-httpd-devel0:2.4.23-102.jbcs.el6 · Red Hat:jboss_core_services:1::el6Package registry (OSV)
red hat:jbcs-httpd24-httpd-manual0:2.4.23-102.jbcs.el6 · Red Hat:jboss_core_services:1::el6Package registry (OSV)
red hat:jbcs-httpd24-httpd-selinux0:2.4.23-102.jbcs.el6 · Red Hat:jboss_core_services:1::el6Package registry (OSV)
red hat:jbcs-httpd24-httpd-src-zip0:2.4.23-102.jbcs.el6 · Red Hat:jboss_core_services:1::el6Package registry (OSV)
red hat:openssl0:1.0.1e-48.el6_8.3 · Red Hat:enterprise_linux:6::clientPackage registry (OSV)
red hat:openssl-debuginfo0:1.0.1e-48.el6_8.3 · Red Hat:enterprise_linux:6::clientPackage registry (OSV)
red hat:openssl-devel0:1.0.1e-48.el6_8.3 · Red Hat:enterprise_linux:6::clientPackage registry (OSV)
red hat:openssl-libs1:1.0.1e-51.el7_2.7 · Red Hat:enterprise_linux:7::clientPackage registry (OSV)
red hat:openssl-perl0:1.0.1e-48.el6_8.3 · Red Hat:enterprise_linux:6::clientPackage registry (OSV)
red hat:openssl-static0:1.0.1e-48.el6_8.3 · Red Hat:enterprise_linux:6::clientPackage registry (OSV)
suse:compat-openssl0980.9.8j-102.1 · SUSE:Linux Enterprise Desktop 12 SP1Package registry (OSV)
suse:firefox-atk2.26.1-2.8.4 · SUSE:Linux Enterprise Server 11 SP4-LTSSPackage registry (OSV)
suse:firefox-cairo1.15.10-2.13.4 · SUSE:Linux Enterprise Server 11 SP4-LTSSPackage registry (OSV)
suse:firefox-gdk-pixbuf2.36.11-2.8.4 · SUSE:Linux Enterprise Server 11 SP4-LTSSPackage registry (OSV)
suse:firefox-glib22.54.3-2.14.7 · SUSE:Linux Enterprise Server 11 SP4-LTSSPackage registry (OSV)
suse:firefox-gtk33.10.9-2.15.3 · SUSE:Linux Enterprise Server 11 SP4-LTSSPackage registry (OSV)
suse:firefox-harfbuzz1.7.5-2.7.4 · SUSE:Linux Enterprise Server 11 SP4-LTSSPackage registry (OSV)
suse:MozillaFirefox68.2.0-78.51.4 · SUSE:Linux Enterprise Server 11 SP4-LTSSPackage registry (OSV)
suse:MozillaFirefox-branding-SLED68-21.9.8 · SUSE:Linux Enterprise Server 11 SP4-LTSSPackage registry (OSV)
suse:nodejs44.6.0-8.1 · SUSE:Linux Enterprise Module for Web and Scripting 12Package registry (OSV)
suse:openssl1.0.1i-27.21.1 · SUSE:Linux Enterprise Server for SAP Applications 12Package registry (OSV)
suse:openssl11.0.1g-0.52.1 · SUSE:Linux Enterprise Server 11-SECURITYPackage registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

Bug bounty scope

The product’s vendor appears in a public program. Matched by name; verify the scope text in the program.

Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · variant or chain candidate.

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
none
Availability
none
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
None
Availability impact
None

Weakness class (CWE)

CWE-203 · Observable Discrepancy

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

References

Show all references (19 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records