CVE-2022-24884— Trivial signature forgery in ecdsautils
Quick assessment
Affected
freifunk-gluon ecdsautils
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
ECDSA Util是一个用于 ECDSA 的小程序集合。 ECDSA Util 0.4.1之前版本存在安全漏洞，该漏洞源于ecdsa_verify_[prepare_]legacy()不检查签名值r和s是否非零。
Possible ATT&CK Techniques 1 AI
T1610 · Deploy Container
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I. Basic Information for CVE-2022-24884
Vulnerability Information
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Vulnerability Title
Trivial signature forgery in ecdsautils
Source: CVE Program / CVE List V5
Vulnerability Description
ecdsautils is a tiny collection of programs used for ECDSA (keygen, sign, verify). `ecdsa_verify_[prepare_]legacy()` does not check whether the signature values `r` and `s` are non-zero. A signature consisting only of zeroes is always considered valid, making it trivial to forge signatures. Requiring multiple signatures from different public keys does not mitigate the issue: `ecdsa_verify_list_legacy()` will accept an arbitrary number of such forged signatures. Both the `ecdsautil verify` CLI command and the libecdsautil library are affected. The issue has been fixed in ecdsautils 0.4.1. All older versions of ecdsautils (including versions before the split into a library and a CLI utility) are vulnerable.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
密码学签名的验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
ECDSA Util 数据伪造问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
ECDSA Util是一个用于 ECDSA 的小程序集合。 ECDSA Util 0.4.1之前版本存在安全漏洞，该漏洞源于ecdsa_verify_[prepare_]legacy()不检查签名值r和s是否非零。
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 |
|---|---|---|---|---|
| freifunk-gluon | ecdsautils | < 0.4.1 | - |
|
II. Public POCs for CVE-2022-24884
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2022-24884 (2)
Vendor Advisories for CVE-2022-24884 (2)
Mailing List Discussions for CVE-2022-24884 (4)
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https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L7UBR3M4U3LA46BHXYSH7EN5GDG44GK7/ vendor-advisory x_refsource_FEDORA
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https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/G2JT57AAFIEL7JDO2ZBV25JKYME5NU54/ vendor-advisory x_refsource_FEDORA
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https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4AKQH5WCBMJA3ODCSNERY6HVX4BX3ITG/ vendor-advisory x_refsource_FEDORA
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V. Comments for CVE-2022-24884
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