Buffer overflow in PTP (Picture Transfer Protocol) of EOS series digital cameras (EOS-1D X firmware version 2.1.0 and earlier, EOS-1D X MKII firmware version 1.1.6 and earlier, EOS-1D C firmware version 1.4.1 and earlier, EOS 5D MARK III firmware version 1.3.5 and earlier, EOS 5D MARK IV firmware version 1.2.0 and earlier, EOS 5DS firmware version 1.1.2 and earlier, EOS 5DS R firmware version 1.1.2 and earlier, EOS 6D firmware version 1.1.8 and earlier, EOS 6D MARK II firmware version 1.0.4 and earlier, EOS 7D MARK II firmware version 1.1.2 and earlier, EOS 70 D firmware version 1.1.2 and earlier, EOS 80 D firmware version 1.0.2 and earlier, EOS KISS X7I / EOS D REBEL T5I / EOS 700D firmware version 1.1.5 and earlier, EOS KISS X8I / EOS D REBEL T6I / EOS 750D firmware version 1.0.0 and earlier, EOS KISS X9I / EOS D REBEL T7I / EOS 800D firmware version 1.0.1 and earlier, EOS KISS X7 / EOS D REBEL SL1 / EOS 100D firmware version 1.0.1 and earlier, EOS KISS X9 / EOS D REBEL SL2 / EOS 200D firmware version 1.0.1 and earlier, EOS KISS X10 / EOS D REBEL SL3 / EOS 200D / EOS 250D firmware version 1.0.1 and earlier, EOS 8000D / EOS D REBEL T6S / EOS 760D firmware version 1.0.0 and earlier, EOS 9000D / EOS 77D firmware version 1.0.2 and earlier, EOS KISS X70 / EOS D REBEL T5 / EOS 1200D firmware version 1.0.2 and earlier, EOS D REBEL T5 RE / EOS 1200D MG / EOS HI firmware version 1.0.2 and earlier, EOS KISS X80 / EOS D REBEL T6 / EOS 1300D firmware version 1.1.0 and earlier, EOS KISS X90 / EOS D REBEL T7 / EOS 1500D / EOS 2000D firmware version 1.0.0 and earlier, EOS D REBEL T100 / EOS 3000D / EOS 4000D firmware version 1.0.0 and earlier, EOS R firmware version 1.3.0 and earlier, EOS RP firmware version 1.2.0 and earlier, EOS RP GOLD firmware version 1.2.0 and earlier, EOS M2 firmware version 1.0.3 and earlier, EOS M3 firmware version 1.2.0 and earlier, EOS M5 firmware version 1.0.1 and earlier, EOS M6 firmware version 1.0.1 and earlier, EOS M6(China) firmware version 5.0.0 and earlier, EOS M10 firmware version 1.1.0 and earlier, EOS M100 firmware version 1.0.0 and earlier, EOS KISS M / EOS M50 firmware version 1.0.2 and earlier) and PowerShot SX740 HS firmware version 1.0.1 and earlier, PowerShot SX70 HS firmware version 1.1.0 and earlier, and PowerShot G5Xmark II firmware version 1.0.1 and earlier allows an attacker on the same network segment to trigger the affected product being unresponsive or to execute arbitrary code on the affected product via sendhostinfo command.
The product writes data past the end, or before the beginning, of the intended buffer.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Eos-1d_x_firmware | Canon | * | 2.1.0 (including) |
Use a language that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
For example, many languages that perform their own memory management, such as Java and Perl, are not subject to buffer overflows. Other languages, such as Ada and C#, typically provide overflow protection, but the protection can be disabled by the programmer.
Be wary that a language’s interface to native code may still be subject to overflows, even if the language itself is theoretically safe.
Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
Examples include the Safe C String Library (SafeStr) by Messier and Viega [REF-57], and the Strsafe.h library from Microsoft [REF-56]. These libraries provide safer versions of overflow-prone string-handling functions.
Use automatic buffer overflow detection mechanisms that are offered by certain compilers or compiler extensions. Examples include: the Microsoft Visual Studio /GS flag, Fedora/Red Hat FORTIFY_SOURCE GCC flag, StackGuard, and ProPolice, which provide various mechanisms including canary-based detection and range/index checking.
D3-SFCV (Stack Frame Canary Validation) from D3FEND [REF-1334] discusses canary-based detection in detail.
Consider adhering to the following rules when allocating and managing an application’s memory:
Run or compile the software using features or extensions that randomly arrange the positions of a program’s executable and libraries in memory. Because this makes the addresses unpredictable, it can prevent an attacker from reliably jumping to exploitable code.
Examples include Address Space Layout Randomization (ASLR) [REF-58] [REF-60] and Position-Independent Executables (PIE) [REF-64]. Imported modules may be similarly realigned if their default memory addresses conflict with other modules, in a process known as “rebasing” (for Windows) and “prelinking” (for Linux) [REF-1332] using randomly generated addresses. ASLR for libraries cannot be used in conjunction with prelink since it would require relocating the libraries at run-time, defeating the whole purpose of prelinking.
For more information on these techniques see D3-SAOR (Segment Address Offset Randomization) from D3FEND [REF-1335].
Use a CPU and operating system that offers Data Execution Protection (using hardware NX or XD bits) or the equivalent techniques that simulate this feature in software, such as PaX [REF-60] [REF-61]. These techniques ensure that any instruction executed is exclusively at a memory address that is part of the code segment.
For more information on these techniques see D3-PSEP (Process Segment Execution Prevention) from D3FEND [REF-1336].