{
  "threat_severity" : "Moderate",
  "public_date" : "2023-03-20T00:00:00Z",
  "bugzilla" : {
    "description" : "curl: SSH connection too eager reuse still",
    "id" : "2179103",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2179103"
  },
  "cvss3" : {
    "cvss3_base_score" : "5.5",
    "cvss3_scoring_vector" : "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
    "status" : "verified"
  },
  "cwe" : "CWE-305",
  "details" : [ "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." ],
  "acknowledgement" : "Red Hat would like to thank Daniel Stenberg and Harry Sintonen for reporting this issue.",
  "affected_release" : [ {
    "product_name" : "Red Hat Enterprise Linux 9",
    "release_date" : "2023-11-07T00:00:00Z",
    "advisory" : "RHSA-2023:6679",
    "cpe" : "cpe:/a:redhat:enterprise_linux:9",
    "package" : "curl-0:7.76.1-26.el9"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "release_date" : "2023-11-07T00:00:00Z",
    "advisory" : "RHSA-2023:6679",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9",
    "package" : "curl-0:7.76.1-26.el9"
  } ],
  "package_state" : [ {
    "product_name" : ".NET Core 3.1 on Red Hat Enterprise Linux",
    "fix_state" : "Out of support scope",
    "package_name" : "rh-dotnet31-curl",
    "cpe" : "cpe:/a:redhat:rhel_dotnet:3.1"
  }, {
    "product_name" : "Red Hat Enterprise Linux 6",
    "fix_state" : "Out of support scope",
    "package_name" : "curl",
    "cpe" : "cpe:/o:redhat:enterprise_linux:6"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Will not fix",
    "package_name" : "curl",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "fix_state" : "Not affected",
    "package_name" : "curl",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8"
  }, {
    "product_name" : "Red Hat JBoss Core Services",
    "fix_state" : "Affected",
    "package_name" : "jbcs-httpd24-curl",
    "cpe" : "cpe:/a:redhat:jboss_core_services:1"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2023-27538\nhttps://nvd.nist.gov/vuln/detail/CVE-2023-27538\nhttps://curl.se/docs/CVE-2023-27538.html" ],
  "name" : "CVE-2023-27538",
  "csaw" : false
}