Huawei EulerOS: Security Advisory for curl (EulerOS-SA-2024-1260)

# SPDX-FileCopyrightText: 2024 Greenbone AG
# Some text descriptions might be excerpted from (a) referenced
# source(s), and are Copyright (C) by the respective right holder(s).
#
# SPDX-License-Identifier: GPL-2.0-only

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.1.2.2024.1260");
  script_cve_id("CVE-2023-38546", "CVE-2023-46218");
  script_tag(name:"creation_date", value:"2024-03-12 04:24:08 +0000 (Tue, 12 Mar 2024)");
  script_version("2024-03-12T05:06:30+0000");
  script_tag(name:"last_modification", value:"2024-03-12 05:06:30 +0000 (Tue, 12 Mar 2024)");
  script_tag(name:"cvss_base", value:"6.4");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:P/I:P/A:N");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2023-12-12 15:53:14 +0000 (Tue, 12 Dec 2023)");

  script_name("Huawei EulerOS: Security Advisory for curl (EulerOS-SA-2024-1260)");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2024 Greenbone AG");
  script_family("Huawei EulerOS Local Security Checks");
  script_dependencies("gb_huawei_euleros_consolidation.nasl");
  script_mandatory_keys("ssh/login/euleros", "ssh/login/rpms", re:"ssh/login/release=EULEROS\-2\.0SP8");

  script_xref(name:"Advisory-ID", value:"EulerOS-SA-2024-1260");
  script_xref(name:"URL", value:"https://developer.huaweicloud.com/intl/en-us/euleros/securitydetail.html?secId=EulerOS-SA-2024-1260");
  script_xref(name:"URL", value:"https://curl.se/libcurl/c/curl_easy_duphandle.html");

  script_tag(name:"summary", value:"The remote host is missing an update for the Huawei EulerOS 'curl' package(s) announced via the EulerOS-SA-2024-1260 advisory.");

  script_tag(name:"vuldetect", value:"Checks if a vulnerable package version is present on the target host.");

  script_tag(name:"insight", value:"This flaw allows an attacker to insert cookies at will into a running program using libcurl, if the specific series of conditions are met. libcurl performs transfers. In its API, an application creates 'easy handles' that are the individual handles for single transfers. libcurl provides a function call that duplicates en easy handle called [curl_easy_duphandle]([link moved to references]). If a transfer has cookies enabled when the handle is duplicated, the cookie-enable state is also cloned - but without cloning the actual cookies. If the source handle did not read any cookies from a specific file on disk, the cloned version of the handle would instead store the file name as `none` (using the four ASCII letters, no quotes). Subsequent use of the cloned handle that does not explicitly set a source to load cookies from would then inadvertently load cookies from a file named `none` - if such a file exists and is readable in the current directory of the program using libcurl. And if using the correct file format of course.(CVE-2023-38546)

This flaw allows a malicious HTTP server to set 'super cookies' in curl that are then passed back to more origins than what is otherwise allowed or possible. This allows a site to set cookies that then would get sent to different and unrelated sites and domains. It could do this by exploiting a mixed case flaw in curl's function that verifies a given cookie domain against the Public Suffix List (PSL). For example a cookie could be set with `domain=co.UK` when the URL used a lower case hostname `curl.co.uk`, even though `co.uk` is listed as a PSL domain.(CVE-2023-46218)");

  script_tag(name:"affected", value:"'curl' package(s) on Huawei EulerOS V2.0SP8.");

  script_tag(name:"solution", value:"Please install the updated package(s).");

  script_tag(name:"solution_type", value:"VendorFix");
  script_tag(name:"qod_type", value:"package");

  exit(0);
}

include("revisions-lib.inc");
include("pkg-lib-rpm.inc");

release = rpm_get_ssh_release();
if(!release)
  exit(0);

res = "";
report = "";

if(release == "EULEROS-2.0SP8") {

  if(!isnull(res = isrpmvuln(pkg:"curl", rpm:"curl~7.61.1~2.h32.eulerosv2r8", rls:"EULEROS-2.0SP8"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"libcurl", rpm:"libcurl~7.61.1~2.h32.eulerosv2r8", rls:"EULEROS-2.0SP8"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"libcurl-devel", rpm:"libcurl-devel~7.61.1~2.h32.eulerosv2r8", rls:"EULEROS-2.0SP8"))) {
    report += res;
  }

  if(report != "") {
    security_message(data:report);
  } else if(__pkg_match) {
    exit(99);
  }
  exit(0);
}

exit(0);