| 标题 | libimobiledevice fa0f79190142bc309307967c058f89c1b36eb6b8 - version 1.4.0 Memory corruption |
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| 描述 | 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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| 来源 | ⚠️ https://bohmid-com.vercel.app/#/article/blog-afc-writeup |
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| 用户 | ahmed0000 (UID 51651) |
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| 提交 | 2026-10-01 17時21分 (26 日前) |
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| 管理 | 2026-10-25 18時44分 (24 days later) |
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| 状态 | 已接受 |
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| VulDB条目 | 426298 [libimobiledevice 直到 1.4.0 Device Info src/afc.c afc_get_device_info_key value 内存损坏] |
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| 积分 | 20 |
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