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CVE-2024-2511— Unbounded memory growth with session handling in TLSv1.3

Quick assessment

Affected
OpenSSL OpenSSL
Exploitation
High exploitation probability; assess promptly
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

OpenSSL是OpenSSL团队的一个开源的能够实现安全套接层（SSLv2/v3）和安全传输层（TLSv1）协议的通用加密库。该产品支持多种加密算法，包括对称密码、哈希算法、安全散列算法等。 OpenSSL 存在安全漏洞，该漏洞源于攻击者可能会利用某些服务器配置来触发无限制的内存增长，从而导致拒绝服务。

AI Predicted 5.3 Difficulty: Easy EPSS 52.42% · P99

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 4

VendorProduct Version RangeStatus
OpenSSL OpenSSL 3.2.0< 3.2.2 affected
3.1.0< 3.1.6 affected
3.0.0< 3.0.14 affected
1.1.1< 1.1.1y affected
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I. Basic Information for CVE-2024-2511

Vulnerability Information
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Vulnerability Title
Unbounded memory growth with session handling in TLSv1.3
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1325
Source: CVE Program / CVE List V5
Vulnerability Title
OpenSSL 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OpenSSL是OpenSSL团队的一个开源的能够实现安全套接层（SSLv2/v3）和安全传输层（TLSv1）协议的通用加密库。该产品支持多种加密算法，包括对称密码、哈希算法、安全散列算法等。 OpenSSL 存在安全漏洞，该漏洞源于攻击者可能会利用某些服务器配置来触发无限制的内存增长，从而导致拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
OpenSSL OpenSSL 3.2.0 ~ 3.2.2 -

II. Public POCs for CVE-2024-2511

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III. Intelligence Information for CVE-2024-2511

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Patches & Fixes for CVE-2024-2511 (3)

Vendor Advisories for CVE-2024-2511 (2)

Mailing List Discussions for CVE-2024-2511 (1)

Other References for CVE-2024-2511 (1)

IV. Related Vulnerabilities

Same product: OpenSSL
Same vendor: OpenSSL
Same weakness: CWE-1325

V. Comments for CVE-2024-2511

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