OpenSSL before 0.9.8l, and 0.9.8m through 1.x, does not properly restrict…
Priority MEDIUM 59CWE-264Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- None · None · Partial
- Fix status
- Will not fix Red Hat: no fix planned
Attack profile from CVSS 2.0 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-264.
Summary
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
Why it matters now
EPSS 0.66873 99th percentileScored 2026-11-07
Fix Will not fix Red Hat: no fix planned
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 · 13
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:openssl:openssl:0.9.8m:*:*:*:*:*:*:* | 0.9.8m | Vulnerable | OpenSSL |
| cpe:2.3:a:openssl:openssl:0.9.8m:beta1:*:*:*:*:*:* | 0.9.8m beta1 | Vulnerable | OpenSSL |
| cpe:2.3:a:openssl:openssl:0.9.8n:*:*:*:*:*:*:* | 0.9.8n | Vulnerable | OpenSSL |
| cpe:2.3:a:openssl:openssl:0.9.8o:*:*:*:*:*:*:* | 0.9.8o | Vulnerable | OpenSSL |
| cpe:2.3:a:openssl:openssl:0.9.8p:*:*:*:*:*:*:* | 0.9.8p | Vulnerable | OpenSSL |
| cpe:2.3:a:openssl:openssl:0.9.8r:*:*:*:*:*:*:* | 0.9.8r | Vulnerable | OpenSSL |
| cpe:2.3:a:openssl:openssl:0.9.8s:*:*:*:*:*:*:* | 0.9.8s | Vulnerable | OpenSSL |
| cpe:2.3:a:openssl:openssl:0.9.8t:*:*:*:*:*:*:* | 0.9.8t | Vulnerable | OpenSSL |
| cpe:2.3:a:openssl:openssl:0.9.8u:*:*:*:*:*:*:* | 0.9.8u | Vulnerable | OpenSSL |
| cpe:2.3:a:openssl:openssl:0.9.8v:*:*:*:*:*:*:* | 0.9.8v | Vulnerable | OpenSSL |
- cpe:2.3:a:openssl:openssl:0.9.8m:*:*:*:*:*:*:* Versions 0.9.8m Vulnerable ·OpenSSL
- cpe:2.3:a:openssl:openssl:0.9.8m:beta1:*:*:*:*:*:* Versions 0.9.8m beta1 Vulnerable ·OpenSSL
- cpe:2.3:a:openssl:openssl:0.9.8n:*:*:*:*:*:*:* Versions 0.9.8n Vulnerable ·OpenSSL
- cpe:2.3:a:openssl:openssl:0.9.8o:*:*:*:*:*:*:* Versions 0.9.8o Vulnerable ·OpenSSL
- cpe:2.3:a:openssl:openssl:0.9.8p:*:*:*:*:*:*:* Versions 0.9.8p Vulnerable ·OpenSSL
- cpe:2.3:a:openssl:openssl:0.9.8r:*:*:*:*:*:*:* Versions 0.9.8r Vulnerable ·OpenSSL
- cpe:2.3:a:openssl:openssl:0.9.8s:*:*:*:*:*:*:* Versions 0.9.8s Vulnerable ·OpenSSL
- cpe:2.3:a:openssl:openssl:0.9.8t:*:*:*:*:*:*:* Versions 0.9.8t Vulnerable ·OpenSSL
- cpe:2.3:a:openssl:openssl:0.9.8u:*:*:*:*:*:*:* Versions 0.9.8u Vulnerable ·OpenSSL
- cpe:2.3:a:openssl:openssl:0.9.8v:*:*:*:*:*:*:* Versions 0.9.8v Vulnerable ·OpenSSL
Remediation
No fixed version listed by the sources yet.
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 |
Timeline
- 2026-10-02 Threatist record created from CVE-2011-1473
- 2026-10-03 Alias added: GHSA-5wj2-7gqw-v6cm
References
Advisory 1
Other 24
- http://vincent.bernat.im/en/blog/2011-ssl-dos-mitigation.html
- [tls] 20110315 Re: SSL Renegotiation DOS
- [tls] 20110318 Re: SSL Renegotiation DOS
- https://bugzilla.redhat.com/show_bug.cgi?id=707065
- 20140214 ESA-2014-009: RSA BSAFE SSL-J Multiple Vulnerabilities
- http://www.educatedguesswork.org/2011/10/ssltls_and_computational_dos.html
- [oss-security] 20110708 SSL renegotiation DoS CVE-2011-1473
- [tls] 20110318 Re: SSL Renegotiation DOS
- http://orchilles.com/2011/03/ssl-renegotiation-dos.html
- [tls] 20110315 SSL Renegotiation DOS
- [tls] 20110315 Re: SSL Renegotiation DOS
- [rocketmq-dev] 20190527 [GitHub] [rocketmq] bix29 opened a new issue #1233: TLS Client-initiated renegotiation attack (CVE-2011-1473)
- [rocketmq-dev] 20190801 [GitHub] [rocketmq] duhenglucky commented on issue #1233: TLS Client-initiated renegotiation attack (CVE-2011-1473)
- [rocketmq-dev] 20191024 [GitHub] [rocketmq] Journey-x commented on issue #1233: TLS Client-initiated renegotiation attack (CVE-2011-1473)
- [rocketmq-dev] 20200305 [GitHub] [rocketmq] ShadowySpirits commented on issue #1233: TLS Client-initiated renegotiation attack (CVE-2011-1473)
- [rocketmq-dev] 20200305 [GitHub] [rocketmq] coveralls commented on issue #1820: [ISSUE #1233] Fix CVE-2011-1473
- [rocketmq-dev] 20200305 [GitHub] [rocketmq] ShadowySpirits opened a new pull request #1820: [ISSUE #1233] Fix CVE-2011-1473
- [rocketmq-dev] 20210311 [GitHub] [rocketmq] vongosling closed issue #1233: TLS Client-initiated renegotiation attack (CVE-2011-1473)
- [rocketmq-commits] 20210311 [rocketmq] branch develop updated: [ISSUE #1233] Fix CVE-2011-1473
- [rocketmq-dev] 20210311 [GitHub] [rocketmq] vongosling merged pull request #1820: [ISSUE #1233] Fix CVE-2011-1473
- [rocketmq-dev] 20210311 [GitHub] [rocketmq] mouzz commented on pull request #1820: [ISSUE #1233] Fix CVE-2011-1473
- [rocketmq-dev] 20210327 [GitHub] [rocketmq] liufeiguo commented on pull request #1820: [ISSUE #1233] Fix CVE-2011-1473
- [rocketmq-dev] 20210420 [GitHub] [rocketmq] mouzz commented on pull request #1820: [ISSUE #1233] Fix CVE-2011-1473
- [rocketmq-dev] 20210420 [GitHub] [rocketmq] mouzz removed a comment on pull request #1820: [ISSUE #1233] Fix CVE-2011-1473
More Openssl vulnerabilities
- TI-2022-01915 The c_rehash script allows command injection CVSS 3.1CRITICAL 9.8
- TI-2021-02645 SM2 Decryption Buffer Overflow CVSS 3.1CRITICAL 9.8
- TI-2009-03392 The TLS protocol, and the SSL protocol 3.0 and possibly earlier, as used in Microsoft… CVSS 3.1CRITICAL 9.8
- TI-2022-01176 The c_rehash script allows command injection CVSS 3.1CRITICAL 9.8
- TI-2014-00154 The (1) TLS and (2) DTLS implementations in OpenSSL 1.0.1 before 1.0.1g do not properly… KEVCVSS 3.1HIGH 7.5
- TI-2025-14107 Stack buffer overflow in CMS (Auth)EnvelopedData parsing CVSS 3.1HIGH 8.8
Sources
- CVE-2011-1473 · CVE Program
- CVE-2011-1473 · NVD
- FIRST EPSS
- GHSA-5wj2-7gqw-v6cm · GitHub Advisory Database · CC BY 4.0
- CVE-2011-1473 · Red Hat security data · CC BY 4.0
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