MEDIUM
openssl: DoS via repeated SSL session renegotiations
Published Jun 16, 2012
5.0
MEDIUMCVSS 2.0
EPSS 67.19%
Description
OpenSSL before 0.9.8l, and 0.9.8m through 1.x, does not properly restrict client-initiated renegotiation within the SSL and TLS protocols, which might make it easier for remote attackers to cause a denial of service (CPU consumption) by performing many renegotiations within a single connection, a different vulnerability than CVE-2011-5094. NOTE: it can also be argued that it is the responsibility of server deployments, not a security library, to prevent or limit renegotiation when it is inappropriate within a specific environment
Affected products
No data.
Configuration 1
OR
- 0.9.8m
- 0.9.8m
- 0.9.8n
- 0.9.8o
- 0.9.8p
- 0.9.8r
- 0.9.8s
- 0.9.8t
- 0.9.8u
- 0.9.8v
- 0.9.8w
- 0.9.8x
No data.
Red Hat Enterprise Linux 4
openssl
Will not fix
Red Hat Enterprise Linux 4
openssl096b
Will not fix
Red Hat Enterprise Linux 5
openssl
Will not fix
Red Hat Enterprise Linux 5
openssl097a
Will not fix
Red Hat Enterprise Linux 6
openssl
Will not fix
Red Hat Enterprise Linux 6
openssl098e
Will not fix
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 4 | openssl | Will not fix | n/a |
| Red Hat Enterprise Linux 4 | openssl096b | Will not fix | n/a |
| Red Hat Enterprise Linux 5 | openssl | Will not fix | n/a |
| Red Hat Enterprise Linux 5 | openssl097a | Will not fix | n/a |
| Red Hat Enterprise Linux 6 | openssl | Will not fix | n/a |
| Red Hat Enterprise Linux 6 | openssl098e | Will not fix | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
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.
5.0 MEDIUM NVD
AV:N/AC:L/Au:N/C:N/I:N/A:P
Access Vector Network
Access Complexity Low
Authentication None
Confidentiality Impact None
Integrity Impact None
Availability Impact Partial
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
67.19% 0.67189
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.67189
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 (43 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 67.19% (0.67189) | 99.28th | v5 (v2026.06.15) |
| Jul 12, 2026 | 66.42% (0.66422) | 99.19th | v5 (v2026.06.15) |
| Jun 15, 2026 | 67.70% (0.67703) | 99.22th | v5 (v2026.06.15) |
| May 18, 2026 | 55.49% (0.55486) | 98.10th | v4 (v2025.03.14) |
| May 8, 2026 | 64.64% (0.64637) | 98.47th | v4 (v2025.03.14) |
| Mar 21, 2026 | 74.49% (0.74488) | 98.83th | v4 (v2025.03.14) |
| Mar 4, 2026 | 77.86% (0.77865) | 98.98th | v4 (v2025.03.14) |
| Mar 1, 2026 | 74.08% (0.74077) | 98.81th | v4 (v2025.03.14) |
| Feb 15, 2026 | 77.86% (0.77865) | 98.97th | v4 (v2025.03.14) |
| Feb 4, 2026 | 81.01% (0.81008) | 99.12th | v4 (v2025.03.14) |
| Feb 1, 2026 | 77.85% (0.77851) | 98.97th | v4 (v2025.03.14) |
| Jan 4, 2026 | 81.01% (0.81008) | 99.12th | v4 (v2025.03.14) |
| Jan 1, 2026 | 77.85% (0.77851) | 98.97th | v4 (v2025.03.14) |
| Dec 28, 2025 | 81.01% (0.81008) | 99.11th | v4 (v2025.03.14) |
| Dec 27, 2025 | 78.69% (0.78694) | 99.00th | v4 (v2025.03.14) |
| Dec 4, 2025 | 81.01% (0.81008) | 99.10th | v4 (v2025.03.14) |
| Dec 1, 2025 | 77.85% (0.77851) | 98.96th | v4 (v2025.03.14) |
| Nov 21, 2025 | 81.01% (0.81008) | 99.10th | v4 (v2025.03.14) |
| Nov 4, 2025 | 85.62% (0.85621) | 99.33th | v4 (v2025.03.14) |
| Nov 1, 2025 | 83.48% (0.83485) | 99.24th | v4 (v2025.03.14) |
| Oct 28, 2025 | 85.62% (0.85621) | 99.33th | v4 (v2025.03.14) |
| Oct 27, 2025 | 84.06% (0.84059) | 99.26th | v4 (v2025.03.14) |
| Oct 4, 2025 | 85.62% (0.85621) | 99.33th | v4 (v2025.03.14) |
| Sep 15, 2025 | 84.06% (0.84059) | 99.27th | v4 (v2025.03.14) |
| Sep 5, 2025 | 88.74% (0.88742) | 99.49th | v4 (v2025.03.14) |
| Sep 1, 2025 | 81.56% (0.81565) | 99.15th | v4 (v2025.03.14) |
| Aug 12, 2025 | 88.68% (0.88682) | 99.48th | v4 (v2025.03.14) |
| Aug 4, 2025 | 89.85% (0.89855) | 99.55th | v4 (v2025.03.14) |
| Aug 1, 2025 | 88.66% (0.88660) | 99.49th | v4 (v2025.03.14) |
| Jun 2, 2025 | 90.09% (0.90092) | 99.57th | v4 (v2025.03.14) |
| Mar 23, 2025 | 91.81% (0.91815) | 99.68th | v4 (v2025.03.14) |
| Mar 22, 2025 | 89.99% (0.89990) | 99.59th | v4 (v2025.03.14) |
| Mar 17, 2025 | 91.81% (0.91815) | 99.68th | v4 (v2025.03.14) |
| Dec 12, 2024 | 59.76% (0.59762) | 97.88th | v3 (v2023.03.01) |
| Jul 5, 2024 | 59.76% (0.59762) | 97.79th | v3 (v2023.03.01) |
| May 12, 2024 | 65.80% (0.65797) | 97.90th | v3 (v2023.03.01) |
| Mar 15, 2024 | 71.30% (0.71305) | 97.96th | v3 (v2023.03.01) |
| Nov 12, 2023 | 73.73% (0.73731) | 97.80th | v3 (v2023.03.01) |
| Sep 10, 2023 | 93.04% (0.93039) | 98.69th | v3 (v2023.03.01) |
| Mar 7, 2023 | 93.98% (0.93984) | 98.60th | v3 (v2023.03.01) |
| Mar 6, 2023 | 7.56% (0.07559) | 92.87th | v2 (v2022.01.01) |
| Apr 1, 2022 | 7.56% (0.07559) | 92.17th | v2 (v2022.01.01) |
| Feb 4, 2022 | 7.56% (0.07559) | 81.11th | v2 (v2022.01.01) |
Weaknesses (1)
References (28)
- http://archives.neohapsis.com/archives/bugtraq/2014-02/0061.html mailing-listx_refsource_BUGTRAQ
- http://marc.info/?l=bugtraq&m=133951357207000&w=2 vendor-advisoryx_refsource_HP
- http://orchilles.com/2011/03/ssl-renegotiation-dos.html x_refsource_MISC
- http://vincent.bernat.im/en/blog/2011-ssl-dos-mitigation.html x_refsource_MISC
- http://www.educatedguesswork.org/2011/10/ssltls_and_computational_dos.html x_refsource_MISC
- http://www.ietf.org/mail-archive/web/tls/current/msg07553.html mailing-listx_refsource_MLIST
- http://www.ietf.org/mail-archive/web/tls/current/msg07564.html mailing-listx_refsource_MLIST
- http://www.ietf.org/mail-archive/web/tls/current/msg07567.html mailing-listx_refsource_MLIST
- http://www.ietf.org/mail-archive/web/tls/current/msg07576.html mailing-listx_refsource_MLIST
- http://www.ietf.org/mail-archive/web/tls/current/msg07577.html mailing-listx_refsource_MLIST
- http://www.openwall.com/lists/oss-security/2011/07/08/2 mailing-listx_refsource_MLIST
- https://access.redhat.com/security/cve/CVE-2011-1473 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=707065 x_refsource_MISCIssue Tracking
- https://lists.apache.org/thread.html/142b93d261e8ac7c5ceffdce848d622404abc1c286bbc999f43a9e10%40%3Cdev.rocketmq.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/6121becfdd23f9aeb675d5db80616536277d5931d6cde9dca292e509%40%3Cdev.rocketmq.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/8be38d35654441140db8eb3f7433524b3653ac3fdc26e2fa94626a3a%40%3Cdev.rocketmq.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/r13a07a09f98b2841193dbf17a47c7f09b464e0747a1d3e7298ad4c81%40%3Cdev.rocketmq.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/r1e33410bb5c81536e7fe14b51fa83e7bfd9445db61fd10c134792bde%40%3Cdev.rocketmq.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/r298a09a2b98446b27217d719e877c643b6d13fac0bcafe04696a446b%40%3Cdev.rocketmq.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/r3822ad69442291562c2ab41132fc49780d269e8b52deb458b7060f6d%40%3Ccommits.rocketmq.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/r5e595b91f00613dafa635852121d45b161e8b5c3eba4551aeccc6483%40%3Cdev.rocketmq.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/r77fe575893261889b983e067293be72fa1f8c6305ede9fdbc404c514%40%3Cdev.rocketmq.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/r8680f41bcdad13c3f267cb868b45e5fb1f57df8b39d25193f7d66500%40%3Cdev.rocketmq.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/ra95c355827b3c96c8013ed8e0666c851581651be2524f3d28cd4fe71%40%3Cdev.rocketmq.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/rc98eaa3f8223ac75aa5969f717954d8cbc9f3a9d8b7a6156a54fa557%40%3Cdev.rocketmq.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/rf9e8ae0356af3ec4f7780ca651b770721d287d4d55f62f4f754e0a6f%40%3Cdev.rocketmq.apache.org%3E mailing-listx_refsource_MLIST
- https://nvd.nist.gov/vuln/detail/CVE-2011-1473
- https://www.cve.org/CVERecord?id=CVE-2011-1473
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published Jun 16, 2012
Updated Aug 6, 2024
Reserved Mar 21, 2011
Link CVE-2011-1473
CISA Vulnrichment
Updated n/a