Fedora: Security Advisory for dnscrypt-proxy (FEDORA-2022-5ef0bd9a27)

# SPDX-FileCopyrightText: 2022 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("1.3.6.1.4.1.25623.1.0.822087");
  script_version("2025-04-24T05:40:01+0000");
  script_tag(name:"cvss_base", value:"5.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:P/I:N/A:N");
  script_tag(name:"last_modification", value:"2025-04-24 05:40:01 +0000 (Thu, 24 Apr 2025)");
  script_tag(name:"creation_date", value:"2022-07-31 01:15:22 +0000 (Sun, 31 Jul 2022)");
  script_name("Fedora: Security Advisory for dnscrypt-proxy (FEDORA-2022-5ef0bd9a27)");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2022 Greenbone AG");
  script_family("Fedora Local Security Checks");
  script_dependencies("gather-package-list.nasl");
  script_mandatory_keys("ssh/login/fedora", "ssh/login/rpms", re:"ssh/login/release=FC36");

  script_xref(name:"Advisory-ID", value:"FEDORA-2022-5ef0bd9a27");
  script_xref(name:"URL", value:"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LB6DRZZ6NFMXET22LFWVZRPDQ435AVSW");

  script_tag(name:"summary", value:"The remote host is missing an update for the 'dnscrypt-proxy'
  package(s) announced via the FEDORA-2022-5ef0bd9a27 advisory.");

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

  script_tag(name:"insight", value:"A flexible DNS proxy, with support for modern encrypted DNS protocols such as
DNSCrypt v2 and DNS-over-HTTP/2.

Features:

  - DNS traffic encryption and authentication. Supports DNS-over-HTTPS (DoH)
 and DNSCrypt.

  - DNSSEC compatible

  - DNS query monitoring, with separate log files for regular and suspicious
 queries

  - Pattern-based local blocking of DNS names and IP addresses

  - Time-based filtering, with a flexible weekly schedule

  - Transparent redirection of specific domains to specific resolvers

  - DNS caching, to reduce latency and improve privacy

  - Local IPv6 blocking to reduce latency on IPv4-only networks

  - Load balancing: pick a set of resolvers, dnscrypt-proxy will automatically
 measure and keep track of their speed, and balance the traffic across the
 fastest available ones.

  - Cloaking: like a HOSTS file on steroids, that can return preconfigured
 addresses for specific names, or resolve and return the IP address of other
 names. This can be used for local development as well as to enforce safe
 search results on Google, Yahoo and Bing.

  - Automatic background updates of resolvers lists

  - Can force outgoing connections to use TCP, useful with tunnels such as Tor.");

  script_tag(name:"affected", value:"'dnscrypt-proxy' package(s) on Fedora 36.");

  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 == "FC36") {

  if(!isnull(res = isrpmvuln(pkg:"dnscrypt-proxy", rpm:"dnscrypt-proxy~2.1.1~5.fc36", rls:"FC36"))) {
    report += res;
  }

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

exit(0);