CVE-2023-49606
Tinyproxy Remote Code Execution via HTTP Connection Headers Parsing Use-After-Free
Description
A use-after-free vulnerability exists in the HTTP Connection Headers parsing in Tinyproxy 1.11.1 and Tinyproxy 1.10.0. A specially crafted HTTP header can trigger reuse of previously freed memory, which leads to memory corruption and could lead to remote code execution. An attacker needs to make an unauthenticated HTTP request to trigger this vulnerability.
INFO
Published Date :
May 1, 2024, 4:15 p.m.
Last Modified :
Aug. 22, 2025, 2:44 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | CRITICAL | [email protected] |
Solution
- Update the tinyproxy package.
- Upgrade the tinyproxy package.
Public PoC/Exploit Available at Github
CVE-2023-49606 has a 3 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2023-49606.
| URL | Resource |
|---|---|
| http://www.openwall.com/lists/oss-security/2024/05/07/1 | Mailing List Exploit Patch Third Party Advisory Issue Tracking |
| https://talosintelligence.com/vulnerability_reports/TALOS-2023-1889 | Exploit Third Party Advisory |
| http://www.openwall.com/lists/oss-security/2024/05/07/1 | Mailing List Exploit Patch Third Party Advisory Issue Tracking |
| https://talosintelligence.com/vulnerability_reports/TALOS-2023-1889 | Exploit Third Party Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2023-49606 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2023-49606
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
None
Dockerfile
Exploit "TinyFree" for CVE-2023-49606-Poc POC
Python
Critical use-after-free vulnerability discovered in Tinyproxy
C
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2023-49606 vulnerability anywhere in the article.
-
Daily CyberSecurity
Linux Servers Hijacked: Attackers Install Legitimate Proxy Software for Covert Operations
The AhnLab SEcurity intelligence Center (ASEC) has uncovered a series of attacks on poorly secured Linux servers, where instead of deploying classic malware, attackers quietly install legitimate proxy ... Read more
The following table lists the changes that have been made to the
CVE-2023-49606 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Aug. 22, 2025
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:tinyproxy_project:tinyproxy:1.11.1:*:*:*:*:*:*:* *cpe:2.3:a:tinyproxy_project:tinyproxy:1.10.0:*:*:*:*:*:*:* Added Reference Type CVE: http://www.openwall.com/lists/oss-security/2024/05/07/1 Types: Exploit, Issue Tracking, Mailing List, Patch, Third Party Advisory Added Reference Type Talos: http://www.openwall.com/lists/oss-security/2024/05/07/1 Types: Exploit, Issue Tracking, Mailing List, Patch, Third Party Advisory Added Reference Type CVE: https://talosintelligence.com/vulnerability_reports/TALOS-2023-1889 Types: Exploit, Third Party Advisory Added Reference Type Talos: https://talosintelligence.com/vulnerability_reports/TALOS-2023-1889 Types: Exploit, Third Party Advisory -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference http://www.openwall.com/lists/oss-security/2024/05/07/1 Added Reference https://talosintelligence.com/vulnerability_reports/TALOS-2023-1889 -
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
May. 07, 2024
Action Type Old Value New Value Added Reference Talos http://www.openwall.com/lists/oss-security/2024/05/07/1 [No types assigned] -
CVE Modified by [email protected]
May. 01, 2024
Action Type Old Value New Value Removed Reference Talos https://www.talosintelligence.com/vulnerability_reports/TALOS-2023-1889 -
CVE Received by [email protected]
May. 01, 2024
Action Type Old Value New Value Added Description A use-after-free vulnerability exists in the HTTP Connection Headers parsing in Tinyproxy 1.11.1 and Tinyproxy 1.10.0. A specially crafted HTTP header can trigger reuse of previously freed memory, which leads to memory corruption and could lead to remote code execution. An attacker needs to make an unauthenticated HTTP request to trigger this vulnerability. Added Reference Talos https://talosintelligence.com/vulnerability_reports/TALOS-2023-1889 [No types assigned] Added Reference Talos https://www.talosintelligence.com/vulnerability_reports/TALOS-2023-1889 [No types assigned] Added CWE Talos CWE-416 Added CVSS V3.1 Talos AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H