CVE-2022-1966
Description
[REJECTED CVE] A use-after-free vulnerability has been identified in the Linux Kernel's netfilter subsystem that did not properly handle the removal of stateful expressions in some situations. A local attacker could use this to cause a denial of service (system crash) or execute arbitrary code.
Statement
This CVE has been rejected. This candidate is a duplicate of CVE-2022-32250. Note: All CVE users should reference CVE-2022-32250 instead of this candidate.
Understanding the Weakness (CWE)
Integrity
Technical Impact: Modify Memory
The use of previously freed memory may corrupt valid data, if the memory area in question has been allocated and used properly elsewhere.
Availability
Technical Impact: DoS: Crash, Exit, or Restart
If chunk consolidation occurs after the use of previously freed data, the process may crash when invalid data is used as chunk information.
Confidentiality
Technical Impact: Read Memory
Read operations on freed memory can sometimes leak sensitive information instead of causing a crash
Integrity,Confidentiality,Availability
Technical Impact: Execute Unauthorized Code or Commands
If malicious data is entered before chunk consolidation can take place, it may be possible to take advantage of a write-what-where primitive to execute arbitrary code. If the newly allocated data happens to hold a class, in C++ for example, various function pointers may be scattered within the heap data. If one of these function pointers is overwritten with an address to valid shellcode, execution of arbitrary code can be achieved.
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