FKIE_CVE-2023-27538

Vulnerability from fkie_nvd - Published: 2023-03-30 20:15 - Updated: 2025-06-09 15:15
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
7.7 (High) - CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Summary
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.
References
support@hackerone.comhttps://hackerone.com/reports/1898475Exploit, Third Party Advisory
support@hackerone.comhttps://lists.debian.org/debian-lts-announce/2023/04/msg00025.htmlMailing List
support@hackerone.comhttps://security.gentoo.org/glsa/202310-12Third Party Advisory
support@hackerone.comhttps://security.netapp.com/advisory/ntap-20230420-0010/Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://hackerone.com/reports/1898475Exploit, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2023/04/msg00025.htmlMailing List
af854a3a-2127-422b-91ae-364da2661108https://security.gentoo.org/glsa/202310-12Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://security.netapp.com/advisory/ntap-20230420-0010/Third Party Advisory
Impacted products
Vendor Product Version
haxx libcurl *
fedoraproject fedora 36
debian debian_linux 10.0
netapp active_iq_unified_manager -
netapp clustered_data_ontap 9.0
broadcom brocade_fabric_operating_system_firmware -
netapp h300s_firmware -
netapp h300s -
netapp h500s_firmware -
netapp h500s -
netapp h700s_firmware -
netapp h700s -
netapp h410s_firmware -
netapp h410s -
splunk universal_forwarder *
splunk universal_forwarder *
splunk universal_forwarder 9.1.0
To clipboard 

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  "lastModified": "2025-06-09T15:15:29.150",
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Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.