CVE-2023-27538
"libcurl SSH Authentication Bypass"
Description
An authentication bypass vulnerability exists in libcurl prior to v8.0.0 where it reuses a previously established SSH connection despite the fact that an SSH option was modified, which should have prevented reuse. libcurl maintains a pool of previously used connections to reuse them for subsequent transfers if the configurations match. However, two SSH settings were omitted from the configuration check, allowing them to match easily, potentially leading to the reuse of an inappropriate connection.
INFO
Published Date :
March 30, 2023, 8:15 p.m.
Last Modified :
March 27, 2024, 2:46 p.m.
Source :
[email protected]
Remotely Exploitable :
No
Impact Score :
3.6
Exploitability Score :
1.8
Public PoC/Exploit Available at Github
CVE-2023-27538 has a 2 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-2023-27538
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.
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-2023-27538.
| URL | Resource |
|---|---|
| https://hackerone.com/reports/1898475 | Exploit Third Party Advisory |
| https://lists.debian.org/debian-lts-announce/2023/04/msg00025.html | Mailing List |
| https://security.gentoo.org/glsa/202310-12 | Third Party Advisory |
| https://security.netapp.com/advisory/ntap-20230420-0010/ | 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).
None
asp-net-core csharp docker dockerfile javascript react webapi docker-compose
C# Dockerfile HTML JavaScript CSS
None
Shell Python
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2023-27538 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2023-27538 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]
May. 14, 2024
Action Type Old Value New Value -
Reanalysis by [email protected]
Mar. 27, 2024
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:splunk:universal_forwarder:*:*:*:*:*:*:*:* versions from (including) 8.2.0 up to (excluding) 8.2.12 *cpe:2.3:a:splunk:universal_forwarder:*:*:*:*:*:*:*:* versions from (including) 9.0.0 up to (excluding) 9.0.6 *cpe:2.3:a:splunk:universal_forwarder:9.1.0:*:*:*:*:*:*:* -
Modified Analysis by [email protected]
Oct. 20, 2023
Action Type Old Value New Value Changed Reference Type https://lists.debian.org/debian-lts-announce/2023/04/msg00025.html No Types Assigned https://lists.debian.org/debian-lts-announce/2023/04/msg00025.html Mailing List Changed Reference Type https://security.gentoo.org/glsa/202310-12 No Types Assigned https://security.gentoo.org/glsa/202310-12 Third Party Advisory Changed Reference Type https://security.netapp.com/advisory/ntap-20230420-0010/ No Types Assigned https://security.netapp.com/advisory/ntap-20230420-0010/ Third Party Advisory Changed CPE Configuration OR *cpe:2.3:a:haxx:libcurl:*:*:*:*:*:*:*:* versions from (including) 7.16.1 up to (including) 7.88.1 OR *cpe:2.3:a:haxx:libcurl:*:*:*:*:*:*:*:* versions from (including) 7.16.1 up to (excluding) 8.0.0 Added CPE Configuration OR *cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* Added CPE Configuration OR *cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:vmware_vsphere:*:* *cpe:2.3:a:netapp:clustered_data_ontap:9.0:-:*:*:*:*:*:* *cpe:2.3:o:broadcom:brocade_fabric_operating_system_firmware:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:netapp:h300s_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:netapp:h300s:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:netapp:h500s_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:netapp:h500s:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:netapp:h700s_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:netapp:h700s:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:netapp:h410s_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:netapp:h410s:-:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Oct. 11, 2023
Action Type Old Value New Value Added Reference https://security.gentoo.org/glsa/202310-12 [No Types Assigned] -
CVE Modified by [email protected]
Apr. 21, 2023
Action Type Old Value New Value Added Reference https://lists.debian.org/debian-lts-announce/2023/04/msg00025.html [No Types Assigned] -
CVE Modified by [email protected]
Apr. 20, 2023
Action Type Old Value New Value Added Reference https://security.netapp.com/advisory/ntap-20230420-0010/ [No Types Assigned] -
CVE Modified by [email protected]
Apr. 19, 2023
Action Type Old Value New Value Changed Description An authentication bypass vulnerability exists in libcurl v8.0.0 where it reuses a previously established SSH connection despite the fact that an SSH option was modified, which should have prevented reuse. libcurl maintains a pool of previously used connections to reuse them for subsequent transfers if the configurations match. However, two SSH settings were omitted from the configuration check, allowing them to match easily, potentially leading to the reuse of an inappropriate connection. An authentication bypass vulnerability exists in libcurl prior to v8.0.0 where it reuses a previously established SSH connection despite the fact that an SSH option was modified, which should have prevented reuse. libcurl maintains a pool of previously used connections to reuse them for subsequent transfers if the configurations match. However, two SSH settings were omitted from the configuration check, allowing them to match easily, potentially leading to the reuse of an inappropriate connection. Removed Reference https://curl.se/docs/CVE-2023-27538.html [No Types Assigned] Removed Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/36NBD5YLJXXEDZLDGNFCERWRYJQ6LAQW/ [Mailing List, Third Party Advisory] -
CVE Modified by [email protected]
Apr. 14, 2023
Action Type Old Value New Value Added Reference https://curl.se/docs/CVE-2023-27538.html [No Types Assigned] -
Initial Analysis by [email protected]
Apr. 10, 2023
Action Type Old Value New Value Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N Changed Reference Type https://hackerone.com/reports/1898475 No Types Assigned https://hackerone.com/reports/1898475 Exploit, Third Party Advisory Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/36NBD5YLJXXEDZLDGNFCERWRYJQ6LAQW/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/36NBD5YLJXXEDZLDGNFCERWRYJQ6LAQW/ Mailing List, Third Party Advisory Added CWE NIST CWE-287 Added CPE Configuration OR *cpe:2.3:a:haxx:libcurl:*:*:*:*:*:*:*:* versions from (including) 7.16.1 up to (including) 7.88.1 Added CPE Configuration OR *cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Apr. 09, 2023
Action Type Old Value New Value Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/36NBD5YLJXXEDZLDGNFCERWRYJQ6LAQW/ [No Types Assigned]
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2023-27538 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-2023-27538
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.04 }} 0.00%
score
0.13711
percentile