9.8
CRITICAL
CVE-2023-38545
"Curl SOCKS5 Proxy Heap Buffer Overflow"
Description

This flaw makes curl overflow a heap based buffer in the SOCKS5 proxy handshake. When curl is asked to pass along the host name to the SOCKS5 proxy to allow that to resolve the address instead of it getting done by curl itself, the maximum length that host name can be is 255 bytes. If the host name is detected to be longer, curl switches to local name resolving and instead passes on the resolved address only. Due to this bug, the local variable that means "let the host resolve the name" could get the wrong value during a slow SOCKS5 handshake, and contrary to the intention, copy the too long host name to the target buffer instead of copying just the resolved address there. The target buffer being a heap based buffer, and the host name coming from the URL that curl has been told to operate with.

INFO

Published Date :

Oct. 18, 2023, 4:15 a.m.

Last Modified :

July 9, 2024, 2:15 p.m.

Source :

[email protected]

Remotely Exploitable :

Yes !

Impact Score :

5.9

Exploitability Score :

3.9
Public PoC/Exploit Available at Github

CVE-2023-38545 has a 21 public PoC/Exploit available at Github. Go to the Public Exploits tab to see the list.

Affected Products

The following products are affected by CVE-2023-38545 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Microsoft windows_server_2019
2 Microsoft windows_10_1809
3 Microsoft windows_10_21h2
4 Microsoft windows_10_22h2
5 Microsoft windows_server_2022
6 Microsoft windows_11_21h2
7 Microsoft windows_11_22h2
8 Microsoft windows_11_23h2
1 Netapp active_iq_unified_manager
2 Netapp oncommand_insight
3 Netapp oncommand_workflow_automation
1 Haxx curl
2 Haxx libcurl
1 Fedoraproject fedora
: Total Affected Vendor : 4 | Products : 14
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-2023-38545.

URL Resource
http://seclists.org/fulldisclosure/2024/Jan/34 Mailing List Third Party Advisory
http://seclists.org/fulldisclosure/2024/Jan/37 Mailing List Third Party Advisory
http://seclists.org/fulldisclosure/2024/Jan/38 Mailing List Third Party Advisory
https://curl.se/docs/CVE-2023-38545.html Patch Third Party Advisory
https://forum.vmssoftware.com/viewtopic.php?f=8&t=8868
https://lists.fedoraproject.org/archives/list/[email protected]/message/OGMXNRNSJ4ETDK6FRNU3J7SABXPWCHSQ/ Mailing List Third Party Advisory
https://security.netapp.com/advisory/ntap-20231027-0009/ Third Party Advisory
https://security.netapp.com/advisory/ntap-20240201-0005/ Third Party Advisory
https://support.apple.com/kb/HT214036 Third Party Advisory
https://support.apple.com/kb/HT214057 Third Party Advisory
https://support.apple.com/kb/HT214058 Third Party Advisory
https://support.apple.com/kb/HT214063 Third Party Advisory
https://www.secpod.com/blog/high-severity-heap-buffer-overflow-vulnerability/ Patch Third Party Advisory

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).

Profile Photo
felipecruz91/high-profile-demo

None

Makefile Dockerfile Go

Updated: 1 week, 2 days ago
0 stars 0 fork 0 watcher
Born at : Sept. 24, 2024, 1:37 p.m. This repo has been linked 3 different CVEs too.
Profile Photo
testing-felickz/docker-scout-demo

None

Dockerfile Go

Updated: 4 months ago
0 stars 0 fork 0 watcher
Born at : May 29, 2024, 6:54 p.m. This repo has been linked 78 different CVEs too.
Profile Photo
whoami13apt/files2

None

Updated: 4 months, 2 weeks ago
0 stars 0 fork 0 watcher
Born at : May 16, 2024, 2:53 p.m. This repo has been linked 48 different CVEs too.
Profile Photo
mitegun/NYCU_Network_Security

None

Shell C Python

Updated: 1 day, 20 hours ago
0 stars 0 fork 0 watcher
Born at : April 23, 2024, 9:14 a.m. This repo has been linked 1 different CVEs too.
Profile Photo
nphuang/NS-Project-2024-Spring

Network Security Project CVE-2023-38545

Dockerfile Python Shell

Updated: 3 months, 1 week ago
0 stars 0 fork 0 watcher
Born at : March 28, 2024, 6:05 a.m. This repo has been linked 1 different CVEs too.
Profile Photo
malinkamedok/devops_sandbox

Docker image with installed Go and Python made for checking student works at DevOps course

Python Dockerfile Shell

Updated: 3 months, 1 week ago
0 stars 0 fork 0 watcher
Born at : March 27, 2024, 11:02 p.m. This repo has been linked 5 different CVEs too.
Profile Photo
Yang-Shun-Yu/CVE-2023-38545

None

Shell Python

Updated: 6 months, 2 weeks ago
0 stars 0 fork 0 watcher
Born at : March 19, 2024, 1:45 p.m. This repo has been linked 1 different CVEs too.
Profile Photo
MNeverOff/ipmi-server

ipmi-server docker container with Symfony router to connect Home Assistant with IPMI interfaces in a home lab setup.

PHP Dockerfile

Updated: 4 months, 3 weeks ago
1 stars 2 fork 2 watcher
Born at : Feb. 1, 2024, 6:52 p.m. This repo has been linked 4 different CVEs too.
Profile Photo
JosephYostos/Vulnerability-Management-remediation-with-Talon-

None

Updated: 7 months, 3 weeks ago
1 stars 0 fork 0 watcher
Born at : Feb. 1, 2024, 3:28 p.m. This repo has been linked 1 different CVEs too.
Profile Photo
alex-grandson/docker-python-example

None

Dockerfile Python

Updated: 9 months, 3 weeks ago
0 stars 0 fork 0 watcher
Born at : Dec. 13, 2023, 11:51 p.m. This repo has been linked 5 different CVEs too.
Profile Photo
d0rb/CVE-2023-38545

This script is designed to exploit a heap buffer overflow vulnerability in a socks5 proxy server.

Python

Updated: 2 months, 3 weeks ago
22 stars 4 fork 4 watcher
Born at : Oct. 17, 2023, 9:03 a.m. This repo has been linked 1 different CVEs too.
Profile Photo
bcdannyboy/CVE-2023-38545

A proof of concept for testing CVE-2023-38545 against local curl

Shell Python

Updated: 4 weeks ago
4 stars 1 fork 1 watcher
Born at : Oct. 16, 2023, 3:55 p.m. This repo has been linked 1 different CVEs too.
Profile Photo
dbrugman/CVE-2023-38545-POC

CVE-2023-38545 POC for the curl command line tool

Shell

Updated: 10 months ago
2 stars 0 fork 0 watcher
Born at : Oct. 16, 2023, 10:04 a.m. This repo has been linked 1 different CVEs too.
Profile Photo
vanigori/CVE-2023-38545-sample

Dockerfile containing all the necessary setup files to demo the exploit

Dockerfile Shell Python

Updated: 6 months ago
3 stars 2 fork 2 watcher
Born at : Oct. 12, 2023, 4:48 p.m. This repo has been linked 1 different CVEs too.
Profile Photo
fatmo666/CVE-2023-38545-libcurl-SOCKS5-heap-buffer-overflow

Simple PoC causing overflow

C Python

Updated: 11 months, 2 weeks ago
7 stars 3 fork 3 watcher
Born at : Oct. 12, 2023, 7:39 a.m. This repo has been linked 1 different CVEs too.

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2023-38545 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2023-38545 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.

  • CVE Modified by [email protected]

    Jul. 09, 2024

    Action Type Old Value New Value
    Added Reference HackerOne https://forum.vmssoftware.com/viewtopic.php?f=8&t=8868 [No types assigned]
  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • Modified Analysis by [email protected]

    Apr. 01, 2024

    Action Type Old Value New Value
    Changed Reference Type http://seclists.org/fulldisclosure/2024/Jan/34 No Types Assigned http://seclists.org/fulldisclosure/2024/Jan/34 Mailing List, Third Party Advisory
    Changed Reference Type http://seclists.org/fulldisclosure/2024/Jan/37 No Types Assigned http://seclists.org/fulldisclosure/2024/Jan/37 Mailing List, Third Party Advisory
    Changed Reference Type http://seclists.org/fulldisclosure/2024/Jan/38 No Types Assigned http://seclists.org/fulldisclosure/2024/Jan/38 Mailing List, Third Party Advisory
    Changed Reference Type https://security.netapp.com/advisory/ntap-20240201-0005/ No Types Assigned https://security.netapp.com/advisory/ntap-20240201-0005/ Third Party Advisory
    Changed Reference Type https://support.apple.com/kb/HT214036 No Types Assigned https://support.apple.com/kb/HT214036 Third Party Advisory
    Changed Reference Type https://support.apple.com/kb/HT214057 No Types Assigned https://support.apple.com/kb/HT214057 Third Party Advisory
    Changed Reference Type https://support.apple.com/kb/HT214058 No Types Assigned https://support.apple.com/kb/HT214058 Third Party Advisory
    Changed Reference Type https://support.apple.com/kb/HT214063 No Types Assigned https://support.apple.com/kb/HT214063 Third Party Advisory
    Added CPE Configuration OR *cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:*:* versions up to (excluding) 10.0.17763.5122 *cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:*:* versions up to (excluding) 10.0.19044.3693 *cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:*:* versions up to (excluding) 10.0.19045.3693 *cpe:2.3:o:microsoft:windows_11_21h2:*:*:*:*:*:*:*:* versions up to (excluding) 10.0.22000.2600 *cpe:2.3:o:microsoft:windows_11_22h2:*:*:*:*:*:*:*:* versions up to (excluding) 10.0.22621.2715 *cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:*:* versions up to (excluding) 10.0.22631.2715 *cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:* versions up to (excluding) 10.0.17763.5122 *cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:* versions up to (excluding) 10.0.20348.2113
  • CVE Modified by [email protected]

    Feb. 01, 2024

    Action Type Old Value New Value
    Added Reference HackerOne https://security.netapp.com/advisory/ntap-20240201-0005/ [No types assigned]
  • CVE Modified by [email protected]

    Jan. 26, 2024

    Action Type Old Value New Value
    Added Reference HackerOne http://seclists.org/fulldisclosure/2024/Jan/34 [No types assigned]
    Added Reference HackerOne http://seclists.org/fulldisclosure/2024/Jan/37 [No types assigned]
    Added Reference HackerOne http://seclists.org/fulldisclosure/2024/Jan/38 [No types assigned]
  • CVE Modified by [email protected]

    Jan. 23, 2024

    Action Type Old Value New Value
    Added Reference HackerOne https://support.apple.com/kb/HT214036 [No types assigned]
  • CVE Modified by [email protected]

    Jan. 22, 2024

    Action Type Old Value New Value
    Added Reference HackerOne https://support.apple.com/kb/HT214063 [No types assigned]
    Added Reference HackerOne https://support.apple.com/kb/HT214057 [No types assigned]
    Added Reference HackerOne https://support.apple.com/kb/HT214058 [No types assigned]
  • Modified Analysis by [email protected]

    Jan. 21, 2024

    Action Type Old Value New Value
    Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/OGMXNRNSJ4ETDK6FRNU3J7SABXPWCHSQ/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/OGMXNRNSJ4ETDK6FRNU3J7SABXPWCHSQ/ Mailing List, Third Party Advisory
    Changed Reference Type https://security.netapp.com/advisory/ntap-20231027-0009/ No Types Assigned https://security.netapp.com/advisory/ntap-20231027-0009/ Third Party Advisory
    Changed Reference Type https://www.secpod.com/blog/high-severity-heap-buffer-overflow-vulnerability/ No Types Assigned https://www.secpod.com/blog/high-severity-heap-buffer-overflow-vulnerability/ Patch, Third Party Advisory
    Added CPE Configuration OR *cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:*
    Added CPE Configuration OR *cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:vmware_vsphere:*:* *cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:windows:*:* *cpe:2.3:a:netapp:oncommand_insight:-:*:*:*:*:*:*:* *cpe:2.3:a:netapp:oncommand_workflow_automation:-:*:*:*:*:*:*:*
  • CVE Modified by [email protected]

    Nov. 16, 2023

    Action Type Old Value New Value
    Added Reference HackerOne https://www.secpod.com/blog/high-severity-heap-buffer-overflow-vulnerability/ [No types assigned]
  • CVE Modified by [email protected]

    Oct. 28, 2023

    Action Type Old Value New Value
    Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/OGMXNRNSJ4ETDK6FRNU3J7SABXPWCHSQ/ [No Types Assigned]
  • CVE Modified by [email protected]

    Oct. 27, 2023

    Action Type Old Value New Value
    Added Reference https://security.netapp.com/advisory/ntap-20231027-0009/ [No Types Assigned]
  • Initial Analysis by [email protected]

    Oct. 25, 2023

    Action Type Old Value New Value
    Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    Changed Reference Type https://curl.se/docs/CVE-2023-38545.html No Types Assigned https://curl.se/docs/CVE-2023-38545.html Patch, Third Party Advisory
    Added CWE NIST CWE-787
    Added CPE Configuration OR *cpe:2.3:a:haxx:libcurl:*:*:*:*:*:*:*:* versions from (including) 7.69.0 up to (excluding) 8.4.0
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2023-38545 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-2023-38545 weaknesses.

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.27 }} -0.05%

score

0.67985

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
: