11/19/2023 0 Comments Read write execute permissions![]() ![]() Unless, there is a script or plug-in to do it. I believe you will have to patch your executable in order to change read/write/execute permissions on a segment permanently. No changes are made to executable by IDA. There are lots different flags available, but to name few: IMAGE_SCN_MEM_READ, IMAGE_SCN_MEM_WRITE, and IMAGE_SCN_MEM_EXECUTE.Īs IDA loads executable, all work thereafter is done within the database. The structure has the following format: typedef struct _IMAGE_SECTION_HEADER IMAGE_SECTION_HEADER, *PIMAGE_SECTION_HEADER ĭDWORD Characteristics member of the structure holds flags that indicate permission levels for the section/segment. This is basic layout of PE:Įach segment that you see in IDA is a loaded in accordance to IMAGE_SECTION_HEADER structure of the particular section/segment. Let's take Microsoft's PE/COFF format binary for example. These so called flags are imported from binary. SetSegmentAttr(0x00400000, SEGATTR_PERM, 4 | 1) Īlternatively, if you're just looking to deal with warnings from Hex-Rays, it may suffice to use the Segments view in the GUI to change a segment's class from CODE to DATA. ![]() For example, I've read that you've got three different permission groups: owner ( u) group ( g) everyone ( o) Based on these three groups, I now know that: If the file is owned by the user, the user permissions determine the access. I followed a tutorial that explained a big deal to me. Success SetSegmentAttr(long segea, long attr, long value) įrom segment.hpp: /* 22 */ uchar perm // Segment permissions (0-no information)Īs such, if you wanted to set the permissions of a segment that begins at VA 0x00400000 to both Read and Execute, you could just run the following IDC command: 93 I've never really got how chmod worked up until today. I don't know of anything natively built into the GUI that allows you to change the segment permissions, but you can easily change the segment permissions with IDC. ![]()
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