{"id":28155,"date":"2025-04-21T01:28:22","date_gmt":"2025-04-21T01:28:22","guid":{"rendered":""},"modified":"2025-08-30T04:38:55","modified_gmt":"2025-08-30T10:38:55","slug":"cve-2023-41056-heap-overflow-vulnerability-in-redis-in-memory-database","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2023-41056-heap-overflow-vulnerability-in-redis-in-memory-database\/","title":{"rendered":"CVE-2023-41056: Heap Overflow Vulnerability in Redis In-Memory Database<\/strong>"},"content":{"rendered":"

Overview<\/strong><\/p>\n

Redis, a renowned in-memory database storing keys and values, has a severe vulnerability, identified as CVE-2023-41056. This flaw originates from the incorrect handling of memory buffer resizing, which can result in an integer overflow, leading to a heap overflow. The vulnerability is of significant concern as it could potentially lead to remote code execution<\/a>, posing a serious threat to the integrity and security of systems running affected versions of Redis. This can result in systemic compromise or data leakage<\/a>, making it a potentially catastrophic issue for organizations that depend on Redis for their operations.<\/p>\n

Vulnerability Summary<\/strong><\/p>\n

CVE ID: CVE-2023-41056
\nSeverity: High (8.1 CVSS Score)
\nAttack Vector: Network
\nPrivileges Required: Low
\nUser Interaction: None
\nImpact: System compromise<\/a>, data leakage<\/p>\n

Affected Products<\/strong><\/p>\n

Product | Affected Versions<\/p>\n

Redis | Below 7.0.15
\nRedis | Below 7.2.4<\/p>\n

How the Exploit Works<\/strong><\/p>\n

The exploit targets the memory<\/a> buffer resizing mechanism within Redis. When an attacker sends a specifically crafted input to the Redis server, it triggers an integer overflow<\/a> during the resizing process. This overflow then leads to a heap overflow, a memory corruption issue that can grant the attacker the ability to execute arbitrary code<\/a> on the affected system. Depending on the level of privileges associated with the Redis service, this could potentially lead to full system<\/a> compromise.<\/p>\n

Conceptual Example Code<\/strong><\/p>\n

Here is a conceptual example of how an attacker might exploit this vulnerability<\/a>, using a malicious payload sent to the Redis server:<\/p>\n

POST \/redis\/command HTTP\/1.1\nHost: target.example.com\nContent-Type: application\/json\n{ \"command\": \"SET key $(python -c 'print(\"A\"*1000000000)')\" }<\/code><\/pre>\n
The above code is a simplified illustration<\/a>. In practice, the attacker would craft a complex payload designed to trigger the integer overflow and subsequent heap overflow, potentially leading to remote code<\/a> execution.<\/p>\n
Mitigation Guidance<\/strong><\/p>\n
Users are strongly advised to update their Redis instances to versions 7.0.15 or 7.2.4, which includes patches for this vulnerability. For those unable to update immediately, a web application firewall (WAF) or intrusion detection system (IDS) can be utilized as temporary mitigation to monitor and block potential exploit attempts.<\/p>\n","protected":false},"excerpt":{"rendered":"
Overview Redis, a renowned in-memory database storing keys and values, has a severe vulnerability, identified as CVE-2023-41056. This flaw originates from the incorrect handling of memory buffer resizing, which can result in an integer overflow, leading to a heap overflow. The vulnerability is of significant concern as it could potentially lead to remote code execution, […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"footnotes":""},"categories":[1],"tags":[],"vendor":[],"product":[],"attack_vector":[86,80],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-28155","post","type-post","status-publish","format-standard","hentry","category-uncategorized","attack_vector-buffer-overflow","attack_vector-rce"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t