Vulnerability Details : CVE-2023-27535
Potential exploit
An authentication bypass vulnerability exists in libcurl <8.0.0 in the FTP connection reuse feature that can result in wrong credentials being used during subsequent transfers. Previously created connections are kept in a connection pool for reuse if they match the current setup. However, certain FTP settings such as CURLOPT_FTP_ACCOUNT, CURLOPT_FTP_ALTERNATIVE_TO_USER, CURLOPT_FTP_SSL_CCC, and CURLOPT_USE_SSL were not included in the configuration match checks, causing them to match too easily. This could lead to libcurl using the wrong credentials when performing a transfer, potentially allowing unauthorized access to sensitive information.
Vulnerability category: BypassGain privilege
Products affected by CVE-2023-27535
- cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:*
- cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:vmware_vsphere:*:*
- cpe:2.3:o:netapp:h300s_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:netapp:h500s_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:netapp:h700s_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:netapp:h410s_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:a:netapp:ontap_9:-:*:*:*:*:*:*:*
- cpe:2.3:a:splunk:universal_forwarder:*:*:*:*:*:*:*:*
- cpe:2.3:a:splunk:universal_forwarder:*:*:*:*:*:*:*:*
- cpe:2.3:a:splunk:universal_forwarder:9.1.0:*:*:*:*:*:*:*
- cpe:2.3:a:haxx:libcurl:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2023-27535
0.03%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 8 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2023-27535
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
5.9
|
MEDIUM | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N |
2.2
|
3.6
|
NIST |
CWE ids for CVE-2023-27535
-
When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.Assigned by: nvd@nist.gov (Primary)
-
The authentication algorithm is sound, but the implemented mechanism can be bypassed as the result of a separate weakness that is primary to the authentication error.Assigned by: support@hackerone.com (Secondary)
References for CVE-2023-27535
-
https://lists.debian.org/debian-lts-announce/2023/04/msg00025.html
[SECURITY] [DLA 3398-1] curl security updateMailing List;Third Party Advisory
-
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/36NBD5YLJXXEDZLDGNFCERWRYJQ6LAQW/
[SECURITY] Fedora 36 Update: curl-7.82.0-14.fc36 - package-announce - Fedora Mailing-ListsMailing List;Third Party Advisory
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https://security.netapp.com/advisory/ntap-20230420-0010/
March 2023 cURL/libcURL Vulnerabilities in NetApp Products | NetApp Product SecurityThird Party Advisory
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https://security.gentoo.org/glsa/202310-12
curl: Multiple Vulnerabilities (GLSA 202310-12) — Gentoo securityThird Party Advisory
-
https://hackerone.com/reports/1892780
HackerOneExploit;Third Party Advisory
-
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/36NBD5YLJXXEDZLDGNFCERWRYJQ6LAQW/
[SECURITY] Fedora 36 Update: curl-7.82.0-14.fc36 - package-announce - Fedora Mailing-ListsMailing List;Third Party Advisory
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