CVE-2024-2511 Details
Issue summary: Some non-default TLS server configurations can cause unbounded
memory growth when processing TLSv1.3 sessions

Impact summary: An attacker may exploit certain server configurations to trigger
unbounded memory growth that would lead to a Denial of Service

This problem can occur in TLSv1.3 if the non-default SSL_OP_NO_TICKET option is
being used (but not if early_data support is also configured and the default
anti-replay protection is in use). In this case, under certain conditions, the
session cache can get into an incorrect state and it will fail to flush properly
as it fills. The session cache will continue to grow in an unbounded manner. A
malicious client could deliberately create the scenario for this failure to
force a Denial of Service. It may also happen by accident in normal operation.

This issue only affects TLS servers supporting TLSv1.3. It does not affect TLS
clients.

The FIPS modules in 3.2, 3.1 and 3.0 are not affected by this issue. OpenSSL
1.0.2 is also not affected by this issue.
View at NVD
Exploit prediction scoring system (EPSS) score for CVE-2024-2511
EPSS (Exploit Prediction Scoring System): EPSS predicts the likelihood that a vulnerability will be exploited in the wild. A higher percentage means a greater chance of an exploit occurring. The EPSS model produces a probability score between 0 and 1 (0 and 100%).
59.3 Probability of exploitation activity being observed over the next 30 days (99th percentile)
CVSS score for CVE-2024-2511
CVSS (Common Vulnerability Scoring System): An open framework owned and managed by FIRST.Org, Inc. that assigns a numerical score from 0 to 10 to software vulnerabilities to indicate their severity.
5.9 Medium
Products affected by CVE-2024-2511
OpenSSL 3.1.3
OpenSSL 3.1.4
OpenSSL 3.1.5
OpenSSL 3.2.0
OpenSSL 3.2.1
DVE Score by Bitsight AI
DVE scores complement traditional static scoring systems like CVSS with Bitsight AI powered real-time threat intelligence and underground cyber criminal activity so that security teams can reduce alert fatigue and focus on vulnerabilities most likely to be exploited.
Low
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CVE-2024-2511 Global Footprint

Top 10 Identified Countries

Country Observations Percentage
US 17,963 28.25%
JP 7,561 11.89%
DE 4,703 7.40%
CA 3,504 5.51%
NL 2,824 4.44%
FR 2,481 3.90%
CN 2,305 3.63%
GB 1,943 3.06%
KR 1,821 2.86%
IN 1,203 1.89%

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CVE-2024-2511 Industry Footprint

Top 10 Identified Industries

*Service provider organizations (typically Technology and Telecommunications) are disproportionally represented in the results given their upstream ownership of end-user infrastructure. See our FAQs.

Industry* Observations Percentage
Technology 30,609 72.30%
Telecommunications 7,607 17.97%
Education 2,293 5.42%
Government/Politics 565 1.33%
Business Services 177 0.42%
Retail 130 0.31%
Healthcare/Wellness 116 0.27%
Food Production 113 0.27%
Manufacturing 103 0.24%
Finance 101 0.24%

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