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Actionable comments posted: 1
🔭 Outside diff range comments (1)
src/renderer/src/lib/utils.ts (1)
66-84: 💡 Verification agent🧩 Analysis chain
Consider additional validation for security
The fix addresses the specific issue with data favicons, but consider adding validation for other URL types as well. Data URLs could potentially be very large or contain malicious content.
Run this script to check if there are any size or security validations elsewhere in the codebase:
🏁 Script executed:
#!/bin/bash # Find any validation related to favicons or data URLs rg -i 'favicon|dataurl|data:' --type tsLength of output: 28369
Add protocol whitelist and size check in craftActiveFaviconURL
We currently only special-case
data:URLs and proxy everything else—including unsafe schemes likefile:,javascript:or very large data URLs—through our internal handler. To mitigate security and performance risks:• Whitelist only safe schemes (
http:,https:,data:) incraftActiveFaviconURLand fallback to a default/empty favicon for others.
• Enforce a maximum length ondata:URLs (e.g. 100 KB) before returning them; otherwise, use the default icon.Locations to update:
- src/renderer/src/lib/utils.ts: lines 66–84
Suggested diff:
--- a/src/renderer/src/lib/utils.ts +++ b/src/renderer/src/lib/utils.ts @@ export function craftActiveFaviconURL(tabId: number, faviconURL: string | null) { - // If the favicon URL is a data URL, just render it. - // No need to proxy it through the current tab's session. - if (faviconUrlObject?.protocol.toLowerCase() === "data:") { - return faviconURL; - } + const protocol = faviconUrlObject?.protocol.toLowerCase(); + // Only allow http(s) and data URLs + if (protocol === "data:") { + const maxSize = 100 * 1024; // 100 KB + if ((faviconURL?.length ?? 0) <= maxSize) { + return faviconURL; + } + // Fallback to default if data URL is too large + return DEFAULT_ICON_URL; + } + if (!["http:", "https:"].includes(protocol)) { + // Unsupported scheme: use default icon + return DEFAULT_ICON_URL; + }Please add these checks to prevent malicious or overly large data URLs from being used as favicons.
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src/renderer/src/lib/utils.ts(1 hunks)
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🔇 Additional comments (2)
src/renderer/src/lib/utils.ts (2)
69-70: Great explanation in the commentsThe comments clearly explain the rationale behind bypassing the proxy for data URLs, which improves code readability and maintainability.
71-73: 🛠️ Refactor suggestionImprove data URL detection
The current implementation checks if the protocol is exactly "data:", but the proper format for the protocol property of a URL object would be "data:" including the colon. Additionally, you should check if the URL is valid before accessing its properties.
- if (faviconUrlObject?.protocol.toLowerCase() === "data:") { + if (faviconUrlObject && faviconUrlObject.protocol.toLowerCase() === "data:") {Likely an incorrect or invalid review comment.
1 participant
closes #53
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