The asn1_d2i_read_bio function in crypto/asn1/a_d2i_fp.c in the ASN.1 BIO implementation…
Priority MEDIUM 56CWE-399Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Partial Red Hat: 22 fixed, 7 without a fix
Attack profile from CVSS 3.0 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-399 and the CVSS impact.
Summary
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 allows remote attackers to cause a denial of service (memory consumption) via a short invalid encoding.
Why it matters now
EPSS 0.2921 98th percentileScored 2026-11-07
Fix Partial Red Hat: 5 advisoriesRed Hat: 22 fixed, 7 without a fix
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 23
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:* | up to 1.0.1s | Vulnerable | OpenSSL |
| cpe:2.3:a:openssl:openssl:1.0.2:*:*:*:*:*:*:* | 1.0.2 | Vulnerable | OpenSSL |
| cpe:2.3:a:openssl:openssl:1.0.2:beta1:*:*:*:*:*:* | 1.0.2 beta1 | Vulnerable | OpenSSL |
| cpe:2.3:a:openssl:openssl:1.0.2:beta2:*:*:*:*:*:* | 1.0.2 beta2 | Vulnerable | OpenSSL |
| cpe:2.3:a:openssl:openssl:1.0.2:beta3:*:*:*:*:*:* | 1.0.2 beta3 | Vulnerable | OpenSSL |
| cpe:2.3:a:openssl:openssl:1.0.2a:*:*:*:*:*:*:* | 1.0.2a | Vulnerable | OpenSSL |
| cpe:2.3:a:openssl:openssl:1.0.2b:*:*:*:*:*:*:* | 1.0.2b | Vulnerable | OpenSSL |
| cpe:2.3:a:openssl:openssl:1.0.2c:*:*:*:*:*:*:* | 1.0.2c | Vulnerable | OpenSSL |
| cpe:2.3:a:openssl:openssl:1.0.2d:*:*:*:*:*:*:* | 1.0.2d | Vulnerable | OpenSSL |
| cpe:2.3:a:openssl:openssl:1.0.2e:*:*:*:*:*:*:* | 1.0.2e | Vulnerable | OpenSSL |
- cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:* Versions up to 1.0.1s Vulnerable ·OpenSSL
- cpe:2.3:a:openssl:openssl:1.0.2:*:*:*:*:*:*:* Versions 1.0.2 Vulnerable ·OpenSSL
- cpe:2.3:a:openssl:openssl:1.0.2:beta1:*:*:*:*:*:* Versions 1.0.2 beta1 Vulnerable ·OpenSSL
- cpe:2.3:a:openssl:openssl:1.0.2:beta2:*:*:*:*:*:* Versions 1.0.2 beta2 Vulnerable ·OpenSSL
- cpe:2.3:a:openssl:openssl:1.0.2:beta3:*:*:*:*:*:* Versions 1.0.2 beta3 Vulnerable ·OpenSSL
- cpe:2.3:a:openssl:openssl:1.0.2a:*:*:*:*:*:*:* Versions 1.0.2a Vulnerable ·OpenSSL
- cpe:2.3:a:openssl:openssl:1.0.2b:*:*:*:*:*:*:* Versions 1.0.2b Vulnerable ·OpenSSL
- cpe:2.3:a:openssl:openssl:1.0.2c:*:*:*:*:*:*:* Versions 1.0.2c Vulnerable ·OpenSSL
- cpe:2.3:a:openssl:openssl:1.0.2d:*:*:*:*:*:*:* Versions 1.0.2d Vulnerable ·OpenSSL
- cpe:2.3:a:openssl:openssl:1.0.2e:*:*:*:*:*:*:* Versions 1.0.2e Vulnerable ·OpenSSL
Show 13 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:openssl:openssl:1.0.2f:*:*:*:*:*:*:* | 1.0.2f | Vulnerable | OpenSSL |
| cpe:2.3:a:openssl:openssl:1.0.2g:*:*:*:*:*:*:* | 1.0.2g | Vulnerable | OpenSSL |
| cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:* | 7.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_hpc_node:7.0:*:*:*:*:*:*:* | 7.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_hpc_node_eus:7.2:*:*:*:*:*:*:* | 7.2 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:* | 7.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_server_aus:7.2:*:*:*:*:*:*:* | 7.2 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_server_eus:7.2:*:*:*:*:*:*:* | 7.2 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:* | 7.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:* | 6.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_hpc_node:6.0:*:*:*:*:*:*:* | 6.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:* | 6.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:*:*:*:*:*:*:* | 6.0 | Vulnerable | Red Hat |
- cpe:2.3:a:openssl:openssl:1.0.2f:*:*:*:*:*:*:* Versions 1.0.2f Vulnerable ·OpenSSL
- cpe:2.3:a:openssl:openssl:1.0.2g:*:*:*:*:*:*:* Versions 1.0.2g Vulnerable ·OpenSSL
- cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_hpc_node:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_hpc_node_eus:7.2:*:*:*:*:*:*:* Versions 7.2 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_server_aus:7.2:*:*:*:*:*:*:* Versions 7.2 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_server_eus:7.2:*:*:*:*:*:*:* Versions 7.2 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:* Versions 6.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_hpc_node:6.0:*:*:*:*:*:*:* Versions 6.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:* Versions 6.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:*:*:*:*:*:*:* Versions 6.0 Vulnerable ·Red Hat
Remediation
Red Hat 5 advisories
- RHSA-2016:2957 Released 2016-12-15 · Red Hat rating ImportantRed Hat JBoss Core Services Apache HTTP 2.4.23 Release
- Red Hat JBoss Core Services
- RHSA-2016:2073 Released 2016-10-18 · Red Hat rating Importantopenssl security update
- Red Hat Enterprise Linux HPC Node EUS (v. 6.7) openssl-1.0.1e-42.el6_7.5
- Red Hat Enterprise Linux HPC Node Optional EUS (v. 6.7) openssl-devel-1.0.1e-42.el6_7.5, openssl-perl-1.0.1e-42.el6_7.5, openssl-static-1.0.1e-42.el6_7.5
- Red Hat Enterprise Linux Server EUS (v. 6.7) openssl-1.0.1e-42.el6_7.5, openssl-1.0.1e-42.el6_7.5.ppc, openssl-devel-1.0.1e-42.el6_7.5 +1
- Red Hat Enterprise Linux Server Optional EUS (v. 6.7) openssl-perl-1.0.1e-42.el6_7.5, openssl-static-1.0.1e-42.el6_7.5
- RHSA-2016:2056 Released 2016-10-12 · Red Hat rating ImportantRed Hat JBoss Enterprise Application Platform 6.4.10 update
- Red Hat JBoss Enterprise Application Platform 6.4
Show 2 more Red Hat advisories
- RHSA-2016:0996 Released 2016-05-10 · Red Hat rating Importantopenssl security update
- Red Hat Enterprise Linux Desktop (v. 6) openssl-1.0.1e-48.el6_8.1
- Red Hat Enterprise Linux Desktop Optional (v. 6) openssl-devel-1.0.1e-48.el6_8.1, openssl-perl-1.0.1e-48.el6_8.1, openssl-static-1.0.1e-48.el6_8.1
- Red Hat Enterprise Linux HPC Node (v. 6) openssl-1.0.1e-48.el6_8.1
- Red Hat Enterprise Linux HPC Node Optional (v. 6) openssl-devel-1.0.1e-48.el6_8.1, openssl-perl-1.0.1e-48.el6_8.1, openssl-static-1.0.1e-48.el6_8.1
- Red Hat Enterprise Linux Server (v. 6) openssl-1.0.1e-48.el6_8.1, openssl-1.0.1e-48.el6_8.1.ppc, openssl-devel-1.0.1e-48.el6_8.1 +1
- Red Hat Enterprise Linux Server Optional (v. 6) openssl-perl-1.0.1e-48.el6_8.1, openssl-static-1.0.1e-48.el6_8.1
- Red Hat Enterprise Linux Workstation (v. 6) openssl-1.0.1e-48.el6_8.1, openssl-devel-1.0.1e-48.el6_8.1
- Red Hat Enterprise Linux Workstation Optional (v. 6) openssl-perl-1.0.1e-48.el6_8.1, openssl-static-1.0.1e-48.el6_8.1
- RHSA-2016:0722 Released 2016-05-09 · Red Hat rating Importantopenssl security update
- Red Hat Enterprise Linux Client (v. 7) openssl-1:1.0.1e-51.el7_2.5, openssl-libs-1:1.0.1e-51.el7_2.5
- Red Hat Enterprise Linux Client Optional (v. 7) openssl-devel-1:1.0.1e-51.el7_2.5, openssl-perl-1:1.0.1e-51.el7_2.5, openssl-static-1:1.0.1e-51.el7_2.5
- Red Hat Enterprise Linux ComputeNode (v. 7) openssl-1:1.0.1e-51.el7_2.5, openssl-libs-1:1.0.1e-51.el7_2.5
- Red Hat Enterprise Linux ComputeNode Optional (v. 7) openssl-devel-1:1.0.1e-51.el7_2.5, openssl-perl-1:1.0.1e-51.el7_2.5, openssl-static-1:1.0.1e-51.el7_2.5
- Red Hat Enterprise Linux Server (v. 7) openssl-1:1.0.1e-51.el7_2.5, openssl-devel-1:1.0.1e-51.el7_2.5, openssl-devel-1:1.0.1e-51.el7_2.5.ppc +2
- Red Hat Enterprise Linux Server Optional (v. 7) openssl-perl-1:1.0.1e-51.el7_2.5, openssl-static-1:1.0.1e-51.el7_2.5, openssl-static-1:1.0.1e-51.el7_2.5.ppc
- Red Hat Enterprise Linux Workstation (v. 7) openssl-1:1.0.1e-51.el7_2.5, openssl-devel-1:1.0.1e-51.el7_2.5, openssl-libs-1:1.0.1e-51.el7_2.5
- Red Hat Enterprise Linux Workstation Optional (v. 7) openssl-perl-1:1.0.1e-51.el7_2.5, openssl-static-1:1.0.1e-51.el7_2.5
Vendor assessments
Red Hat
Red Hat rating: Low. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 4 | Affected | No fix planned: Will not fix |
| Red Hat Enterprise Linux 5 | Affected | No fix planned: Will not fix |
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Will not fix |
| Red Hat Enterprise Linux 7 | Affected | No fix planned: Will not fix |
| Red Hat JBoss Core Services | Affected | No fix yet |
| Red Hat JBoss Enterprise Web Server 2 | Affected | No fix planned: Will not fix |
| Red Hat JBoss Enterprise Web Server 3 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux Client (v. 7) | Fixed | RHSA-2016:0722 |
| Red Hat Enterprise Linux Client Optional (v. 7) | Fixed | RHSA-2016:0722 |
| Red Hat Enterprise Linux ComputeNode (v. 7) | Fixed | RHSA-2016:0722 |
| Red Hat Enterprise Linux ComputeNode Optional (v. 7) | Fixed | RHSA-2016:0722 |
| Red Hat Enterprise Linux Desktop (v. 6) | Fixed | RHSA-2016:0996 |
| Red Hat Enterprise Linux Desktop Optional (v. 6) | Fixed | RHSA-2016:0996 |
| Red Hat Enterprise Linux HPC Node (v. 6) | Fixed | RHSA-2016:0996 |
| Red Hat Enterprise Linux HPC Node EUS (v. 6.7) | Fixed | RHSA-2016:2073 |
| Red Hat Enterprise Linux HPC Node Optional (v. 6) | Fixed | RHSA-2016:0996 |
| Red Hat Enterprise Linux HPC Node Optional EUS (v. 6.7) | Fixed | RHSA-2016:2073 |
| Red Hat Enterprise Linux Server (v. 6) | Fixed | RHSA-2016:0996 |
| Red Hat Enterprise Linux Server (v. 7) | Fixed | RHSA-2016:0722 |
| Red Hat Enterprise Linux Server EUS (v. 6.7) | Fixed | RHSA-2016:2073 |
| Red Hat Enterprise Linux Server Optional (v. 6) | Fixed | RHSA-2016:0996 |
| Red Hat Enterprise Linux Server Optional (v. 7) | Fixed | RHSA-2016:0722 |
| Red Hat Enterprise Linux Server Optional EUS (v. 6.7) | Fixed | RHSA-2016:2073 |
| Red Hat Enterprise Linux Workstation (v. 6) | Fixed | RHSA-2016:0996 |
| Red Hat Enterprise Linux Workstation (v. 7) | Fixed | RHSA-2016:0722 |
| Red Hat Enterprise Linux Workstation Optional (v. 6) | Fixed | RHSA-2016:0996 |
| Red Hat Enterprise Linux Workstation Optional (v. 7) | Fixed | RHSA-2016:0722 |
| Red Hat JBoss Core Services | Fixed | RHSA-2016:2957 |
| Red Hat JBoss Enterprise Application Platform 6.4 | Fixed | RHSA-2016:2056 |
Not affected: 2 products
- Red Hat JBoss Enterprise Application Platform 5
- Red Hat JBoss Enterprise Web Server 1
Timeline
- 2026-10-02 Threatist record created from CVE-2016-2109
- 2026-10-03 Alias added: GHSA-mq63-fmfx-8qc3
References
Advisory 28
- SSA:2016-124-01
- RHSA-2016:2056
- openSUSE-SU-2016:1238
- openSUSE-SU-2016:1242
- SUSE-SU-2016:1267
- RHSA-2016:2073
- DSA-3566
- openSUSE-SU-2016:1243
- GLSA-201612-16
- SUSE-SU-2016:1228
- openSUSE-SU-2016:1239
- SUSE-SU-2016:1206
- 20160504 Multiple Vulnerabilities in OpenSSL Affecting Cisco Products: May 2016
- SUSE-SU-2016:1231
- openSUSE-SU-2016:1240
- openSUSE-SU-2016:1241
- APPLE-SA-2016-07-18-1
- SUSE-SU-2016:1360
- SUSE-SU-2016:1233
- openSUSE-SU-2016:1237
- RHSA-2016:0996
- SUSE-SU-2016:1290
- openSUSE-SU-2016:1273
- RHSA-2016:2957
- USN-2959-1
- RHSA-2016:0722
- FreeBSD-SA-16:17
- https://www.openssl.org/news/secadv/20160503.txt
Other 24
- http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html
- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05320149
- http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html
- http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html
- https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03765en_us
- http://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.html
- http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
- http://packetstormsecurity.com/files/136912/Slackware-Security-Advisory-openssl-Updates.html
- http://www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.html
- https://kc.mcafee.com/corporate/index?page=content&id=SB10160
- https://source.android.com/security/bulletin/2017-07-01
- http://www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.html
- https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03756en_us
- http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
- https://www.tenable.com/security/tns-2016-18
- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05390722
- https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA40202
- https://security.netapp.com/advisory/ntap-20160504-0001/
- https://git.openssl.org/?p=openssl.git%3Ba=commit%3Bh=c62981390d6cf9e3d612c489b8b77c2913b25807
- http://www.oracle.com/technetwork/security-advisory/cpujul2017-3236622.html
- https://support.apple.com/HT206903
- https://bto.bluecoat.com/security-advisory/sa123
- http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10759
- https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf
Sources
- CVE-2016-2109 · CVE Program
- CVE-2016-2109 · NVD
- FIRST EPSS
- GHSA-mq63-fmfx-8qc3 · GitHub Advisory Database · CC BY 4.0
- CVE-2016-2109 · Red Hat security data · CC BY 4.0
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