CVE-2023-38545

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2023-38545
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.

9.8 /10

CVSS v3 : CRITICAL

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References
Link 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/package-announce@lists.fedoraproject.org/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
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/package-announce@lists.fedoraproject.org/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
https://github.com/UTsweetyfish/CVE-2023-38545
https://github.com/bcdannyboy/CVE-2023-38545
https://github.com/dbrugman/CVE-2023-38545-POC
Configurations

Configuration 1 (hide)

cpe:2.3:a:haxx:libcurl:*:*:*:*:*:*:*:*

Configuration 2 (hide)

cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:*

Configuration 3 (hide)

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:-:*:*:*:*:*:*:*

Configuration 4 (hide)

OR cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_11_21h2:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_11_22h2:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*
History

13 Feb 2025, 17:16

Type Values Removed Values Added
Summary (en) 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. (en) 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.

21 Nov 2024, 08:13

Type Values Removed Values Added
References
  • () https://github.com/UTsweetyfish/CVE-2023-38545 -
  • () https://github.com/bcdannyboy/CVE-2023-38545 -
  • () https://github.com/dbrugman/CVE-2023-38545-POC -
References () http://seclists.org/fulldisclosure/2024/Jan/34 - Mailing List, Third Party Advisory () http://seclists.org/fulldisclosure/2024/Jan/34 - Mailing List, Third Party Advisory
References () http://seclists.org/fulldisclosure/2024/Jan/37 - Mailing List, Third Party Advisory () http://seclists.org/fulldisclosure/2024/Jan/37 - Mailing List, Third Party Advisory
References () http://seclists.org/fulldisclosure/2024/Jan/38 - Mailing List, Third Party Advisory () http://seclists.org/fulldisclosure/2024/Jan/38 - Mailing List, Third Party Advisory
References () https://curl.se/docs/CVE-2023-38545.html - Patch, Third Party Advisory () https://curl.se/docs/CVE-2023-38545.html - Patch, Third Party Advisory
References () https://forum.vmssoftware.com/viewtopic.php?f=8&t=8868 - () https://forum.vmssoftware.com/viewtopic.php?f=8&t=8868 -
References () https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OGMXNRNSJ4ETDK6FRNU3J7SABXPWCHSQ/ - Mailing List, Third Party Advisory () https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OGMXNRNSJ4ETDK6FRNU3J7SABXPWCHSQ/ - Mailing List, Third Party Advisory
References () https://security.netapp.com/advisory/ntap-20231027-0009/ - Third Party Advisory () https://security.netapp.com/advisory/ntap-20231027-0009/ - Third Party Advisory
References () https://security.netapp.com/advisory/ntap-20240201-0005/ - Third Party Advisory () https://security.netapp.com/advisory/ntap-20240201-0005/ - Third Party Advisory
References () https://support.apple.com/kb/HT214036 - Third Party Advisory () https://support.apple.com/kb/HT214036 - Third Party Advisory
References () https://support.apple.com/kb/HT214057 - Third Party Advisory () https://support.apple.com/kb/HT214057 - Third Party Advisory
References () https://support.apple.com/kb/HT214058 - Third Party Advisory () https://support.apple.com/kb/HT214058 - Third Party Advisory
References () https://support.apple.com/kb/HT214063 - Third Party Advisory () https://support.apple.com/kb/HT214063 - Third Party Advisory
References () https://www.secpod.com/blog/high-severity-heap-buffer-overflow-vulnerability/ - Patch, Third Party Advisory () https://www.secpod.com/blog/high-severity-heap-buffer-overflow-vulnerability/ - Patch, Third Party Advisory

09 Jul 2024, 14:15

Type Values Removed Values Added
References
  • () https://forum.vmssoftware.com/viewtopic.php?f=8&t=8868 -

01 Apr 2024, 15:45

Type Values Removed Values Added
First Time Microsoft windows 10 1809
Microsoft windows 11 22h2
Microsoft
Microsoft windows 10 22h2
Microsoft windows 10 21h2
Microsoft windows 11 21h2
Microsoft windows 11 23h2
Microsoft windows Server 2022
Microsoft windows Server 2019
CPE cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_11_22h2:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_11_21h2:*:*:*:*:*:*:*:*
References () http://seclists.org/fulldisclosure/2024/Jan/34 - () http://seclists.org/fulldisclosure/2024/Jan/34 - Mailing List, Third Party Advisory
References () http://seclists.org/fulldisclosure/2024/Jan/37 - () http://seclists.org/fulldisclosure/2024/Jan/37 - Mailing List, Third Party Advisory
References () http://seclists.org/fulldisclosure/2024/Jan/38 - () http://seclists.org/fulldisclosure/2024/Jan/38 - Mailing List, Third Party Advisory
References () https://security.netapp.com/advisory/ntap-20240201-0005/ - () https://security.netapp.com/advisory/ntap-20240201-0005/ - Third Party Advisory
References () https://support.apple.com/kb/HT214036 - () https://support.apple.com/kb/HT214036 - Third Party Advisory
References () https://support.apple.com/kb/HT214057 - () https://support.apple.com/kb/HT214057 - Third Party Advisory
References () https://support.apple.com/kb/HT214058 - () https://support.apple.com/kb/HT214058 - Third Party Advisory
References () https://support.apple.com/kb/HT214063 - () https://support.apple.com/kb/HT214063 - Third Party Advisory

01 Feb 2024, 17:15

Type Values Removed Values Added
References
  • () https://security.netapp.com/advisory/ntap-20240201-0005/ -

26 Jan 2024, 17:15

Type Values Removed Values Added
References
  • () http://seclists.org/fulldisclosure/2024/Jan/38 -
  • () http://seclists.org/fulldisclosure/2024/Jan/34 -
  • () http://seclists.org/fulldisclosure/2024/Jan/37 -

23 Jan 2024, 14:15

Type Values Removed Values Added
References
  • () https://support.apple.com/kb/HT214036 -

22 Jan 2024, 19:15

Type Values Removed Values Added
New CVE
Information

Published : 2023-10-18 04:15

Updated : 2025-02-13 17:16

NVD link : CVE-2023-38545

Mitre link : CVE-2023-38545

CVE.ORG link : CVE-2023-38545

JSON object : View

Products Affected

fedoraproject

  • fedora

microsoft

  • windows_10_21h2
  • windows_server_2019
  • windows_server_2022
  • windows_10_1809
  • windows_11_21h2
  • windows_10_22h2
  • windows_11_23h2
  • windows_11_22h2

netapp

  • oncommand_insight
  • oncommand_workflow_automation
  • active_iq_unified_manager

haxx

  • libcurl
CWE
CWE-787

Out-of-bounds Write