Description

Heap-based Buffer Overflow vulnerability in Apache Portable Runtime Utility redis client. This issue affects Apache Portable Runtime Utility: from 1.6.0 through 1.6.3. Users are recommended to upgrade to version 1.6.4, which fixes the issue.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "7.5",
  "pubDate": "2026-08-06T15:16:54.773Z",
  "pubdate": "2026-08-06T15:16:54.773Z",
  "executiveSummary": "A Heap-based Buffer Overflow vulnerability has been identified within the Apache Portable Runtime Utility redis client component. This security flaw specifically impacts Apache Portable Runtime Utility versions ranging from 1.6.0 through 1.6.3. The vulnerability introduces significant risk implications, potentially allowing an attacker to achieve memory corruption, trigger application crashes, or execute arbitrary code depending on the memory layout and runtime environment. The compromise of affected systems stems from improper bounds checking during the handling of data within the redis client module. Successful exploitation requires an attacker to interact with the vulnerable client functionality, typically by supplying maliciously crafted responses or inputs via the network protocol interacting with the redis service. To mitigate these inherent risks, administrators and developers are strongly advised to apply the official software updates provided by the vendor, ensuring system integrity and preventing potential exploitation vectors.",
  "technicalDetails": "The vulnerability resides in the redis client implementation within the Apache Portable Runtime Utility codebase, specifically affecting versions 1.6.0 through 1.6.3. The root cause of the heap-based buffer overflow is deficient memory management and insufficient boundary validation when processing incoming data payloads or responses destined for heap-allocated buffers. During standard execution flow, when the redis client parses data received from a redis server or client-side input source, it fails to properly calculate or enforce the maximum allocation size required for the designated buffer. Consequently, an attacker capable of manipulating the data stream or interacting with the redis client can supply an oversized payload that exceeds the boundaries of the allocated heap chunk. This condition leads to a heap-based buffer overflow, overwriting adjacent heap memory structures, control data, or application state variables. The attack flow initiates when the vulnerable Apache Portable Runtime Utility redis client processes the malicious payload over the network protocol. As the parsing routines execute, the uncontrolled copy operation writes past the end of the destination buffer on the heap. Depending on the sophistication of the payload and the specific memory layout managed by the memory allocator, this memory corruption can result in a denial of service via application termination or potentially be leveraged for arbitrary code execution under the security context of the process utilizing the Apache Portable Runtime Utility. Exploitation does not inherently require prior authentication or elevated privileges if the vulnerable client component processes untrusted network inputs directly, exposing the host to remote security degradation."
}