openssl: ClientHello sigalgs NULL pointer dereference DoS
Published Mar 19, 2015
5.0
MEDIUMCVSS 2.0
EPSS 7.75%
Description
The sigalgs implementation in t1_lib.c in OpenSSL 1.0.2 before 1.0.2a allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) by using an invalid signature_algorithms extension in the ClientHello message during a renegotiation.
Affected products
No data.
No data.
Red Hat Enterprise Linux 4
openssl
Not affected
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 Enterprise Virtualization 3
mingw-virt-viewer
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
Red Hat Storage 2
openssl
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 4 | openssl | Not affected | n/a |
| 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 Enterprise Virtualization 3 | mingw-virt-viewer | 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 |
| Red Hat Storage 2 | openssl | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This issue did not affect the versions 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 (25 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 7.75% (0.07745) | 94.45th | v5 (v2026.06.15) |
| Jun 15, 2026 | 8.11% (0.08112) | 94.08th | v5 (v2026.06.15) |
| May 21, 2026 | 28.03% (0.28029) | 96.54th | v4 (v2025.03.14) |
| Apr 21, 2026 | 14.59% (0.14593) | 94.49th | v4 (v2025.03.14) |
| Mar 3, 2026 | 33.22% (0.33218) | 96.84th | v4 (v2025.03.14) |
| Dec 28, 2025 | 18.07% (0.18068) | 94.95th | v4 (v2025.03.14) |
| Dec 27, 2025 | 11.20% (0.11204) | 93.31th | v4 (v2025.03.14) |
| Dec 14, 2025 | 18.07% (0.18068) | 94.93th | v4 (v2025.03.14) |
| Oct 28, 2025 | 19.27% (0.19274) | 95.09th | v4 (v2025.03.14) |
| Oct 27, 2025 | 12.04% (0.12036) | 93.51th | v4 (v2025.03.14) |
| Oct 1, 2025 | 19.27% (0.19274) | 95.18th | v4 (v2025.03.14) |
| Aug 9, 2025 | 12.04% (0.12036) | 93.49th | v4 (v2025.03.14) |
| Jul 30, 2025 | 9.55% (0.09551) | 92.53th | v4 (v2025.03.14) |
| Mar 30, 2025 | 15.97% (0.15972) | 94.20th | v4 (v2025.03.14) |
| Mar 29, 2025 | 27.94% (0.27938) | 94.39th | v4 (v2025.03.14) |
| Mar 28, 2025 | 15.97% (0.15972) | 94.21th | v4 (v2025.03.14) |
| Mar 17, 2025 | 14.50% (0.14497) | 93.93th | v4 (v2025.03.14) |
| Dec 17, 2024 | 85.32% (0.85325) | 98.76th | v3 (v2023.03.01) |
| Dec 12, 2024 | 89.45% (0.89452) | 98.88th | v3 (v2023.03.01) |
| Feb 24, 2024 | 90.38% (0.90376) | 98.71th | v3 (v2023.03.01) |
| Nov 8, 2023 | 91.90% (0.91899) | 98.65th | v3 (v2023.03.01) |
| Oct 12, 2023 | 91.86% (0.91859) | 98.59th | v3 (v2023.03.01) |
| Mar 7, 2023 | 89.49% (0.89490) | 98.11th | v3 (v2023.03.01) |
| Mar 6, 2023 | 49.93% (0.49928) | 98.72th | v2 (v2022.01.01) |
| Feb 4, 2022 | 49.93% (0.49928) | 98.29th | v2 (v2022.01.01) |
References (23)
- http://marc.info/?l=bugtraq&m=143748090628601&w=2 vendor-advisoryMailing ListThird Party Advisory
- http://marc.info/?l=bugtraq&m=144050155601375&w=2 vendor-advisoryMailing ListThird Party Advisory
- http://marc.info/?l=bugtraq&m=144050297101809&w=2 vendor-advisoryMailing ListThird Party Advisory
- http://www.fortiguard.com/advisory/2015-03-24-openssl-vulnerabilities-march-2015 Third Party Advisory
- http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html PatchThird Party Advisory
- http://www.oracle.com/technetwork/topics/security/bulletinapr2015-2511959.html Third Party Advisory
- http://www.oracle.com/technetwork/topics/security/cpujan2016-2367955.html Third Party Advisory
- http://www.oracle.com/technetwork/topics/security/cpujul2015-2367936.html Third Party Advisory
- http://www.oracle.com/technetwork/topics/security/cpuoct2015-2367953.html Third Party Advisory
- http://www.securityfocus.com/bid/73235 vdb-entryThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1031929 vdb-entryThird Party AdvisoryVDB Entry
- https://access.redhat.com/articles/1384453
- https://access.redhat.com/security/cve/CVE-2015-0291 Vendor Advisory
- https://bto.bluecoat.com/security-advisory/sa92 Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1202338 Issue Tracking
- https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf
- https://git.openssl.org/?p=openssl.git%3Ba=commit%3Bh=76343947ada960b6269090638f5391068daee88d
- https://kc.mcafee.com/corporate/index?page=content&id=SB10110 Third Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2015-0291
- https://openssl.org/news/secadv_20150319.txt
- https://security.gentoo.org/glsa/201503-11 vendor-advisoryThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2015-0291
- https://www.openssl.org/news/secadv_20150319.txt Vendor Advisory
Change history (0)
No recorded changes yet.