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NVD / CVE Program· CNA redhat

CVE-2016-2108: The ASN.1 implementation in OpenSSL before 1.0.1o and 1.0.2 before 1.0.2c allows remote attackers to execute arbitrary code or cause a…

CriticalCVSS 9.8 · v3.0—No exploit Fix available

Noroxi assessment

Priority: This week (action score 62/100)

  • 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: 77.9% (FIRST EPSS); higher than 99.5% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: openssl (Debian:12) 1.0.2c-1; openssl (Debian:7) 1.0.1e-2+deb7u21; openssl (Debian:8) 1.0.1k-3+deb8u5.

Don’t wait for the next maintenance window. Upgrade to openssl (Debian:12) 1.0.2c-1; openssl (Debian:7) 1.0.1e-2+deb7u21; openssl (Debian:8) 1.0.1k-3+deb8u5 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 ASN.1 implementation in OpenSSL before 1.0.1o and 1.0.2 before 1.0.2c allows remote attackers to execute arbitrary code or cause a denial of service (buffer underflow and memory corruption) via an ANY field in crafted serialized data, aka the "negative zero" issue.

Published
May 4, 2016
Updated
Jun 16, 2026
EPSS
77.9% · 99th percentile

Report tools

JSON

Action score

62

This week

Don’t wait for the next maintenance window.

CVSS
39 / 40 · 9.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
23 / 30 · 77.9%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

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  • when EPSS rises 20 points in a week

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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
redhatenterprise linux desktop
redhatenterprise linux hpc node
redhatenterprise linux server
redhatenterprise linux workstation
redhatenterprise linux hpc node eus
redhatenterprise linux server aus
redhatenterprise linux server eus
googleandroid

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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.

  • google android4.0
  • google android4.0.1
  • google android4.0.2
  • google android4.0.3
  • google android4.0.4
  • google android4.1
  • google android4.1.2
  • google android4.2
+12 more rows
  • google android4.2.1
  • google android4.2.2
  • google android4.3
  • google android4.3.1
  • google android4.4
  • google android4.4.1
  • google android4.4.2
  • google android4.4.3
  • google android5.0
  • google android5.0.1
  • google android5.1
  • google android5.1.0

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12opensslbefore 1.0.2c-11.0.2c-1
Debian:7opensslbefore 1.0.1e-2+deb7u211.0.1e-2+deb7u21
Debian:8opensslbefore 1.0.1k-3+deb8u51.0.1k-3+deb8u5
Red Hat:enterprise_linux:5::clientopensslbefore 0:0.9.8e-40.el5_110:0.9.8e-40.el5_11
Red Hat:enterprise_linux:5::clientopenssl-debuginfobefore 0:0.9.8e-40.el5_110:0.9.8e-40.el5_11
Red Hat:enterprise_linux:5::clientopenssl-perlbefore 0:0.9.8e-40.el5_110:0.9.8e-40.el5_11
Red Hat:enterprise_linux:5::client_workstationopenssl-develbefore 0:0.9.8e-40.el5_110:0.9.8e-40.el5_11
Red Hat:enterprise_linux:6::clientopensslbefore 0:1.0.1e-48.el6_8.10:1.0.1e-48.el6_8.1
Red Hat:enterprise_linux:6::clientopenssl-debuginfobefore 0:1.0.1e-48.el6_8.10:1.0.1e-48.el6_8.1
Red Hat:enterprise_linux:6::clientopenssl-develbefore 0:1.0.1e-48.el6_8.10:1.0.1e-48.el6_8.1
Red Hat:enterprise_linux:6::clientopenssl-perlbefore 0:1.0.1e-48.el6_8.10:1.0.1e-48.el6_8.1
Red Hat:enterprise_linux:6::clientopenssl-staticbefore 0:1.0.1e-48.el6_8.10:1.0.1e-48.el6_8.1
Red Hat:enterprise_linux:7::clientopensslbefore 1:1.0.1e-51.el7_2.51:1.0.1e-51.el7_2.5
Red Hat:enterprise_linux:7::clientopenssl-debuginfobefore 1:1.0.1e-51.el7_2.51:1.0.1e-51.el7_2.5
Red Hat:enterprise_linux:7::clientopenssl-develbefore 1:1.0.1e-51.el7_2.51:1.0.1e-51.el7_2.5
Red Hat:enterprise_linux:7::clientopenssl-libsbefore 1:1.0.1e-51.el7_2.51:1.0.1e-51.el7_2.5
Red Hat:enterprise_linux:7::clientopenssl-perlbefore 1:1.0.1e-51.el7_2.51:1.0.1e-51.el7_2.5
Red Hat:enterprise_linux:7::clientopenssl-staticbefore 1:1.0.1e-51.el7_2.51:1.0.1e-51.el7_2.5
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

+87

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-2016-2106May 4, 2016 · Integer overflow in the EVP_EncryptUpdate function in crypto/evp/evp_enc.c in OpenSSL before 1.0.1t and 1.0.2 before 1.0.2h allows remote…
    38Monitor
  • ← EarlierCVE-2016-2107May 4, 2016 · 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 certain padding…
    50Plan
  • Later →CVE-2016-2109May 4, 2016 · The asn1_d2i_read_bio function in crypto/asn1/a_d2i_fp.c in the ASN.1 BIO implementation in OpenSSL before 1.0.1t and 1.0.2 before 1.0.2h…
    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
debian:openssl1.0.2c-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:openssl1:1.0.1e-51.el7_2.5 · Red Hat:enterprise_linux:7::clientPackage registry (OSV)
red hat:openssl-debuginfo1:1.0.1e-51.el7_2.5 · Red Hat:enterprise_linux:7::clientPackage registry (OSV)
red hat:openssl-devel1:1.0.1e-51.el7_2.5 · Red Hat:enterprise_linux:7::clientPackage registry (OSV)
red hat:openssl-libs1:1.0.1e-51.el7_2.5 · Red Hat:enterprise_linux:7::clientPackage registry (OSV)
red hat:openssl-perl1:1.0.1e-51.el7_2.5 · Red Hat:enterprise_linux:7::clientPackage registry (OSV)
red hat:openssl-static1:1.0.1e-51.el7_2.5 · Red Hat:enterprise_linux:7::clientPackage registry (OSV)
suse:compat-openssl097g0.9.7g-146.22.44.1 · SUSE:Linux Enterprise Server for SAP Applications 11 SP3Package registry (OSV)
suse:compat-openssl0980.9.8j-97.1 · SUSE:Linux Enterprise Desktop 12Package registry (OSV)
suse:openssl1.0.1i-27.16.1 · SUSE:Linux Enterprise Desktop 12Package registry (OSV)
suse:openssl11.0.1g-0.47.1 · 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.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Not on record for this CVE: patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-119 · Improper Restriction of Operations within the Bounds of a Memory Buffer

CVSS vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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