Description
A software system that accepts input in the form of a backslash absolute path (‘absolutepathnamehere’) without appropriate validation can allow an attacker to traverse the file system to unintended locations or access arbitrary files.
Modes of Introduction:
– Implementation
Related Weaknesses
CWE-36
Consequences
Confidentiality, Integrity: Read Files or Directories, Modify Files or Directories
Potential Mitigations
Phase: Implementation
Effectiveness: High
Description:
Phase: Implementation
Description:
Inputs should be decoded and canonicalized to the application’s current internal representation before being validated (CWE-180). Make sure that the application does not decode the same input twice (CWE-174). Such errors could be used to bypass allowlist validation schemes by introducing dangerous inputs after they have been checked.
CVE References
- CVE-1999-1263
- Mail client allows remote attackers to overwrite arbitrary files via an e-mail message containing a uuencoded attachment that specifies the full pathname for the file to be modified.
- CVE-2003-0753
- Remote attackers can read arbitrary files via a full pathname to the target file in config parameter.
- CVE-2002-1525
- Remote attackers can read arbitrary files via an absolute pathname.
