| Title | libimobiledevice fa0f79190142bc309307967c058f89c1b36eb6b8 - version 1.4.0 Memory corruption heap out of bound |
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| Description | Heap overflow: this_len > entire_len
Location: src/afc.c:308-314
entire_len = (uint32_t)header.entire_length - sizeof(AFCPacket); // allocation size
this_len = (uint32_t)header.this_length - sizeof(AFCPacket); // recv size
buf = (char*)malloc(entire_len);
if (this_len > 0) { err = ...service_receive(client->parent, buf, this_len, &recv_len); }
Root cause. Only header.this_length < sizeof(AFCPacket) is rejected (line 293). There is no this_len <= entire_len check, no entire_length >= sizeof(AFCPacket) check, and the u64 fields are silently narrowed to uint32_t. service_receive (src/service.c:177) → idevice_connection_receive_timeout (src/idevice.c:749) performs a single recv of up to size bytes, so the peer makes the host write this_len bytes into an entire_len-byte buffer. |
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| Source | ⚠️ https://bohmid-com.vercel.app/#/article/blog-afc-writeup |
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| User | ahmed0000 (UID 51651) |
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| Submission | 10/01/2026 17:14 (25 days ago) |
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| Moderation | 10/25/2026 18:44 (24 days later) |
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| Status | Accepted |
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| VulDB entry | 426297 [libimobiledevice up to 1.4.0 AFC src/afc.c heap-based overflow] |
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| Points | 20 |
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