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CVE-2021-43823— Side-channel attack in Sourcegraph

Quick assessment

Affected
sourcegraph sourcegraph
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.

Sourcegraph是美国Sourcegraph公司的一款开源的代码搜索和导航工具。 Sourcegraph 3.33.2之前版本存在信息泄露漏洞，该漏洞源于版本3.33.2之前的Sourcegraph容易受到侧通道攻击，其中私有源代码中的字符串可能会被经过身份验证但未经授权的参与者猜测。此问题影响已保存搜索和代码监视功能。这可能允许攻击者可利用该漏洞猜测源代码中的格式化标记，比如API密钥。

CVSS 6.5 · Medium EPSS 0.84% · P55
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I. Basic Information for CVE-2021-43823

Vulnerability Information
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Vulnerability Title
Side-channel attack in Sourcegraph
Source: CVE Program / CVE List V5
Vulnerability Description
Sourcegraph is a code search and navigation engine. Sourcegraph prior to version 3.33.2 is vulnerable to a side-channel attack where strings in private source code could be guessed by an authenticated but unauthorized actor. This issue affects the Saved Searches and Code Monitoring features. A successful attack would require an authenticated bad actor to create many Saved Searches or Code Monitors to receive confirmation that a specific string exists. This could allow an attacker to guess formatted tokens in source code, such as API keys. This issue was patched in version 3.33.2 and any future versions of Sourcegraph. We strongly encourage upgrading to secure versions. If you are unable to, you may disable Saved Searches and Code Monitors.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
Sourcegraph 信息泄露漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Sourcegraph是美国Sourcegraph公司的一款开源的代码搜索和导航工具。 Sourcegraph 3.33.2之前版本存在信息泄露漏洞，该漏洞源于版本3.33.2之前的Sourcegraph容易受到侧通道攻击，其中私有源代码中的字符串可能会被经过身份验证但未经授权的参与者猜测。此问题影响已保存搜索和代码监视功能。这可能允许攻击者可利用该漏洞猜测源代码中的格式化标记，比如API密钥。
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
sourcegraph sourcegraph < 3.33.2 -

II. Public POCs for CVE-2021-43823

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III. Intelligence Information for CVE-2021-43823

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Vendor Advisories for CVE-2021-43823 (1)

IV. Related Vulnerabilities

Same product: sourcegraph
Same vendor: sourcegraph
Same weakness: CWE-200

V. Comments for CVE-2021-43823

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