CVE-2016-15059
Description
A flaw was found in Net::IDN::Punycode. An attacker can supply a specially crafted string which, when encoded by the XS backend, can lead to unchecked writes past the output buffer. This heap buffer overflow can corrupt the heap, potentially leading to arbitrary code execution or denial of service (DoS).
Statement
This vulnerability is rated as having Important impact because untrusted input supplied to services or applications that encode internationalized domain names can trigger a heap-based buffer overflow, potentially allowing remote execution of arbitrary code or process termination. Although the flaw poses significant risk in vulnerable environments, Red Hat Enterprise Linux is not affected as supported product packages do not contain the vulnerable code.
Understanding the Weakness (CWE)
Integrity
Technical Impact: Modify Memory; Execute Unauthorized Code or Commands
Write operations could cause memory corruption. In some cases, an adversary can modify control data such as return addresses in order to execute unexpected code.
Availability
Technical Impact: DoS: Crash, Exit, or Restart
Attempting to access out-of-range, invalid, or unauthorized memory could cause the product to crash.
Other
Technical Impact: Unexpected State
Subsequent write operations can produce undefined or unexpected results.
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