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CVE-2021-32738— Utils.readChallengeTx does not verify the server account signature

Quick assessment

Affected
stellar js-stellar-sdk
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.

js-stellar-sdk是一个应用软件。一个用于与Stellar Horizo​​n 服务器通信的 Javascript 库 。 Js-stellar-sdk 8.2.3之前版本存在数据伪造问题漏洞，该漏洞源于程序的"Utils.readChallengeTx"函数没有验证服务器是否已签署交易。

CVSS 6.5 · Medium EPSS 0.51% · P42

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2021-32738

Vulnerability Information
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Vulnerability Title
Utils.readChallengeTx does not verify the server account signature
Source: CVE Program / CVE List V5
Vulnerability Description
js-stellar-sdk is a Javascript library for communicating with a Stellar Horizon server. The `Utils.readChallengeTx` function used in SEP-10 Stellar Web Authentication states in its function documentation that it reads and validates the challenge transaction including verifying that the `serverAccountID` has signed the transaction. In js-stellar-sdk before version 8.2.3, the function does not verify that the server has signed the transaction. Applications that also used `Utils.verifyChallengeTxThreshold` or `Utils.verifyChallengeTxSigners` to verify the signatures including the server signature on the challenge transaction are unaffected as those functions verify the server signed the transaction. Applications calling `Utils.readChallengeTx` should update to version 8.2.3, the first version with a patch for this vulnerability, to ensure that the challenge transaction is completely valid and signed by the server creating the challenge transaction.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
认证机制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
js-stellar-sdk 数据伪造问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
js-stellar-sdk是一个应用软件。一个用于与Stellar Horizo​​n 服务器通信的 Javascript 库 。 Js-stellar-sdk 8.2.3之前版本存在数据伪造问题漏洞，该漏洞源于程序的"Utils.readChallengeTx"函数没有验证服务器是否已签署交易。
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
stellar js-stellar-sdk < 8.2.3 -

II. Public POCs for CVE-2021-32738

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III. Intelligence Information for CVE-2021-32738

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Vendor Advisories for CVE-2021-32738 (1)

Other References for CVE-2021-32738 (1)

IV. Related Vulnerabilities

Same vendor: stellar
Same weakness: CWE-287

V. Comments for CVE-2021-32738

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