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CVE-2024-9143— Low-level invalid GF(2^m) parameters lead to OOB memory access

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存在缓冲区错误漏洞，该漏洞源于允许越界内存写入，从而导致应用程序崩溃。

AI Predicted 4.9 Difficulty: Hard EPSS 5.84% · P93

Affected Version Matrix 6

VendorProduct Version RangeStatus
OpenSSL OpenSSL 3.3.0< 3.3.3 affected
3.2.0< 3.2.4 affected
3.1.0< 3.1.8 affected
3.0.0< 3.0.16 affected
1.1.1< 1.1.1zb affected
1.0.2< 1.0.2zl affected
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I. Basic Information for CVE-2024-9143

Vulnerability Information
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Vulnerability Title
Low-level invalid GF(2^m) parameters lead to OOB memory access
Source: CVE Program / CVE List V5
Vulnerability Description
Issue summary: Use of the low-level GF(2^m) elliptic curve APIs with untrusted explicit values for the field polynomial can lead to out-of-bounds memory reads or writes. Impact summary: Out of bound memory writes can lead to an application crash or even a possibility of a remote code execution, however, in all the protocols involving Elliptic Curve Cryptography that we're aware of, either only "named curves" are supported, or, if explicit curve parameters are supported, they specify an X9.62 encoding of binary (GF(2^m)) curves that can't represent problematic input values. Thus the likelihood of existence of a vulnerable application is low. In particular, the X9.62 encoding is used for ECC keys in X.509 certificates, so problematic inputs cannot occur in the context of processing X.509 certificates. Any problematic use-cases would have to be using an "exotic" curve encoding. The affected APIs include: EC_GROUP_new_curve_GF2m(), EC_GROUP_new_from_params(), and various supporting BN_GF2m_*() functions. Applications working with "exotic" explicit binary (GF(2^m)) curve parameters, that make it possible to represent invalid field polynomials with a zero constant term, via the above or similar APIs, may terminate abruptly as a result of reading or writing outside of array bounds. Remote code execution cannot easily be ruled out. The FIPS modules in 3.3, 3.2, 3.1 and 3.0 are not affected by this issue.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5
Vulnerability Title
OpenSSL 缓冲区错误漏洞
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存在缓冲区错误漏洞，该漏洞源于允许越界内存写入，从而导致应用程序崩溃。
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 3.3.0 ~ 3.3.3 -

II. Public POCs for CVE-2024-9143

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III. Intelligence Information for CVE-2024-9143

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Patches & Fixes for CVE-2024-9143 (4)

Other References for CVE-2024-9143 (3)

IV. Related Vulnerabilities

Same product: OpenSSL
Same vendor: OpenSSL
Same weakness: CWE-125

V. Comments for CVE-2024-9143

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