FreeBSD Ports: krb5

# SPDX-FileCopyrightText: 2011 E-Soft Inc.
# 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("1.3.6.1.4.1.25623.1.0.68692");
  script_version("2023-07-26T05:05:09+0000");
  script_tag(name:"last_modification", value:"2023-07-26 05:05:09 +0000 (Wed, 26 Jul 2023)");
  script_tag(name:"creation_date", value:"2011-01-24 17:55:59 +0100 (Mon, 24 Jan 2011)");
  script_tag(name:"cvss_base", value:"3.5");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:S/C:N/I:P/A:N");
  script_tag(name:"severity_vector", value:"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2020-01-21 15:46:00 +0000 (Tue, 21 Jan 2020)");
  script_cve_id("CVE-2010-4020");
  script_name("FreeBSD Ports: krb5");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2011 E-Soft Inc.");
  script_family("FreeBSD Local Security Checks");
  script_dependencies("gather-package-list.nasl");
  script_mandatory_keys("ssh/login/freebsd", "ssh/login/freebsdrel");

  script_tag(name:"insight", value:"The following package is affected: krb5

CVE-2010-4020
MIT Kerberos 5 (aka krb5) 1.8.x through 1.8.3 does not reject RC4
key-derivation checksums, which might allow remote authenticated users
to forge a (1) AD-SIGNEDPATH or (2) AD-KDC-ISSUED signature, and
possibly gain privileges, by leveraging the small key space that
results from certain one-byte stream-cipher operations.");

  script_tag(name:"solution", value:"Update your system with the appropriate patches or
software upgrades.");

  script_tag(name:"summary", value:"The remote host is missing an update to the system
as announced in the referenced advisory.");

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

  script_xref(name:"URL", value:"http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2010-007.txt");
  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/45117");
  script_xref(name:"URL", value:"http://www.vuxml.org/freebsd/1d193bba-03f6-11e0-bf50-001a926c7637.html");

  exit(0);
}

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

txt = "";
vuln = FALSE;

bver = portver(pkg:"krb5");
if(!isnull(bver) && revcomp(a:bver, b:"1.8.0")>=0 && revcomp(a:bver, b:"1.8.3")<=0) {
  txt += 'Package krb5 version ' + bver + ' is installed which is known to be vulnerable.\n';
  vuln = TRUE;
}

if(vuln) {
  security_message(data:txt);
} else if (__pkg_match) {
  exit(99);
}