OpenSSL: Anon DH ServerKeyExchange with 0 p parameter
Published Dec 6, 2015
5.0
MEDIUMCVSS 2.0
EPSS 4.98%
Description
The ssl3_get_key_exchange function in ssl/s3_clnt.c in OpenSSL 1.0.2 before 1.0.2e allows remote servers to cause a denial of service (segmentation fault) via a zero p value in an anonymous Diffie-Hellman (DH) ServerKeyExchange message.
Affected products
No data.
No data.
Red Hat Enterprise Linux 5
openssl
Not affected
Red Hat Enterprise Linux 5
openssl097a
Not affected
Red Hat Enterprise Linux 6
openssl
Not affected
Red Hat Enterprise Linux 6
openssl098e
Not affected
Red Hat Enterprise Linux 7
openssl
Not affected
Red Hat Enterprise Linux 7
openssl098e
Not affected
Red Hat JBoss Enterprise Application Platform 6
openssl
Not affected
Red Hat JBoss Enterprise Web Server 1
openssl
Not affected
Red Hat JBoss Enterprise Web Server 2
openssl
Not affected
Red Hat JBoss Enterprise Web Server 3
openssl
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | openssl | Not affected | n/a |
| Red Hat Enterprise Linux 5 | openssl097a | Not affected | n/a |
| Red Hat Enterprise Linux 6 | openssl | Not affected | n/a |
| Red Hat Enterprise Linux 6 | openssl098e | Not affected | n/a |
| Red Hat Enterprise Linux 7 | openssl | Not affected | n/a |
| Red Hat Enterprise Linux 7 | openssl098e | Not affected | n/a |
| Red Hat JBoss Enterprise Application Platform 6 | openssl | Not affected | n/a |
| Red Hat JBoss Enterprise Web Server 1 | openssl | Not affected | n/a |
| Red Hat JBoss Enterprise Web Server 2 | openssl | Not affected | n/a |
| Red Hat JBoss Enterprise Web Server 3 | openssl | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This issue does not affect the version of OpenSSL as shipped with Red Hat Enterprise Linux 5, 6 and 7.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:N/AC:L/Au:N/C:N/I:N/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (24 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 4.98% (0.04980) | 91.94th | v5 (v2026.06.15) |
| Jul 14, 2026 | 4.98% (0.04980) | 91.21th | v5 (v2026.06.15) |
| Jun 15, 2026 | 6.16% (0.06162) | 92.54th | v5 (v2026.06.15) |
| Dec 28, 2025 | 10.71% (0.10711) | 93.07th | v4 (v2025.03.14) |
| Dec 27, 2025 | 5.96% (0.05965) | 90.40th | v4 (v2025.03.14) |
| Dec 14, 2025 | 10.71% (0.10711) | 93.05th | v4 (v2025.03.14) |
| Oct 28, 2025 | 5.81% (0.05807) | 90.09th | v4 (v2025.03.14) |
| Oct 27, 2025 | 3.13% (0.03134) | 86.36th | v4 (v2025.03.14) |
| Oct 1, 2025 | 5.81% (0.05807) | 90.18th | v4 (v2025.03.14) |
| Jul 30, 2025 | 3.13% (0.03134) | 86.36th | v4 (v2025.03.14) |
| Mar 30, 2025 | 5.22% (0.05224) | 88.98th | v4 (v2025.03.14) |
| Mar 29, 2025 | 7.33% (0.07335) | 85.85th | v4 (v2025.03.14) |
| Mar 17, 2025 | 5.22% (0.05224) | 89.23th | v4 (v2025.03.14) |
| Dec 30, 2024 | 9.73% (0.09733) | 94.82th | v3 (v2023.03.01) |
| Dec 17, 2024 | 11.96% (0.11956) | 95.32th | v3 (v2023.03.01) |
| May 20, 2024 | 12.99% (0.12989) | 95.49th | v3 (v2023.03.01) |
| Mar 7, 2024 | 11.36% (0.11356) | 95.06th | v3 (v2023.03.01) |
| Jan 5, 2024 | 14.67% (0.14672) | 95.25th | v3 (v2023.03.01) |
| May 18, 2023 | 13.08% (0.13078) | 94.68th | v3 (v2023.03.01) |
| Mar 7, 2023 | 7.07% (0.07074) | 92.89th | v3 (v2023.03.01) |
| Mar 6, 2023 | 4.72% (0.04720) | 89.23th | v2 (v2022.01.01) |
| Dec 14, 2022 | 4.72% (0.04720) | 88.93th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.54% (0.01537) | 72.41th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.54% (0.01537) | 51.33th | v2 (v2022.01.01) |
References (17)
- http://fortiguard.com/advisory/openssl-advisory-december-2015
- http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10759
- http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10761
- http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00009.html vendor-advisory
- http://openssl.org/news/secadv/20151203.txt Vendor Advisory
- http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20151204-openssl vendor-advisory
- http://www.oracle.com/technetwork/security-advisory/cpuapr2016v3-2985753.html
- http://www.securitytracker.com/id/1034294 vdb-entry
- http://www.slackware.com/security/viewer.php?l=slackware-security&y=2015&m=slackware-security.754583 vendor-advisory
- http://www.ubuntu.com/usn/USN-2830-1 vendor-advisory
- https://access.redhat.com/security/cve/CVE-2015-1794 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1288955 Issue Tracking
- https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf
- https://git.openssl.org/?p=openssl.git%3Ba=commit%3Bh=ada57746b6b80beae73111fe1291bf8dd89af91c
- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05398322
- https://nvd.nist.gov/vuln/detail/CVE-2015-1794
- https://www.cve.org/CVERecord?id=CVE-2015-1794
Change history (0)
No recorded changes yet.