| Titel | libimobiledevice fa0f79190142bc309307967c058f89c1b36eb6b8 - version 1.4.0 Memory corruption |
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| Beschreibung | unpaired key → strdup(NULL)
Location: src/afc.c:640-645
for (ptr = kvps; *ptr; ptr++) {
if (!strcmp(*ptr, key)) {
*value = strdup(*(ptr+1)); // no check that a value follows
break;
}
}
Root cause. Device info is a flat NUL-separated key/value list turned into a char** with a NULL sentinel. An odd list (lone key) leaves the matched key's ptr+1 pointing at the NULL sentinel → strdup(NULL) → strlen(NULL) → SIGSEGV.
Trigger (peer): reply to GET_DEVINFO with body ModelNumber\0 only; victim calls afc_get_device_info_key(client, "ModelNumber", &value).
Impact. Reliable NULL deref / crash (DoS). With prior Bug heap corruption, the sentinel can be attacker-influenced → arbitrary read into strdup |
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| Quelle | ⚠️ https://bohmid-com.vercel.app/#/article/blog-afc-writeup |
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| Benutzer | ahmed0000 (UID 51651) |
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| Einreichung | 01.10.2026 17:21 (vor 26 Tagen) |
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| Moderieren | 25.10.2026 18:44 (24 days later) |
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| Status | Akzeptiert |
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| VulDB Eintrag | 426298 [libimobiledevice bis 1.4.0 Device Info src/afc.c afc_get_device_info_key value Pufferüberlauf] |
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| Punkte | 20 |
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