In the ea_get function in fs/jfs/xattr.c in the Linux kernel through 4.17.1, a memory corruption bug in JFS can be triggered by calling setxattr twice with two different extended attribute names on the same file. This vulnerability can be triggered by an unprivileged user with the ability to create files and execute programs. A kmalloc call is incorrect, leading to slab-out-of-bounds in jfs_xattr.
The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.
| Link | Tags |
|---|---|
| https://usn.ubuntu.com/3752-2/ | vendor advisory third party advisory vdb entry |
| https://lists.debian.org/debian-lts-announce/2018/07/msg00015.html | mailing list third party advisory vdb entry |
| http://www.securityfocus.com/bid/104452 | third party advisory vdb entry |
| https://usn.ubuntu.com/3752-3/ | vendor advisory third party advisory vdb entry |
| https://lists.debian.org/debian-lts-announce/2018/07/msg00016.html | mailing list third party advisory vdb entry |
| https://usn.ubuntu.com/3753-2/ | vendor advisory third party advisory vdb entry |
| https://usn.ubuntu.com/3754-1/ | vendor advisory third party advisory vdb entry |
| https://lists.debian.org/debian-lts-announce/2018/07/msg00020.html | mailing list third party advisory vdb entry |
| https://marc.info/?l=linux-kernel&m=152814391530549&w=2 | third party advisory |
| https://lkml.org/lkml/2018/6/2/2 | third party advisory vdb entry |
| https://usn.ubuntu.com/3752-1/ | vendor advisory third party advisory vdb entry |
| https://usn.ubuntu.com/3753-1/ | vendor advisory third party advisory vdb entry |