Slackware: Security Advisory (SSA:2021-026-01)

# 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("1.3.6.1.4.1.25623.1.1.13.2021.026.01");
  script_cve_id("CVE-2021-3156");
  script_tag(name:"creation_date", value:"2022-04-21 12:12:27 +0000 (Thu, 21 Apr 2022)");
  script_version("2024-02-02T05:06:09+0000");
  script_tag(name:"last_modification", value:"2024-02-02 05:06:09 +0000 (Fri, 02 Feb 2024)");
  script_tag(name:"cvss_base", value:"7.2");
  script_tag(name:"cvss_base_vector", value:"AV:L/AC:L/Au:N/C:C/I:C/A:C");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2021-02-03 19:42:10 +0000 (Wed, 03 Feb 2021)");

  script_name("Slackware: Security Advisory (SSA:2021-026-01)");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2022 Greenbone AG");
  script_family("Slackware Local Security Checks");
  script_dependencies("gather-package-list.nasl");
  script_mandatory_keys("ssh/login/slackware_linux", "ssh/login/slackpack", re:"ssh/login/release=SLK(14\.0|14\.1|14\.2|current)");

  script_xref(name:"Advisory-ID", value:"SSA:2021-026-01");
  script_xref(name:"URL", value:"http://www.slackware.com/security/viewer.php?l=slackware-security&y=2021&m=slackware-security.461226");

  script_tag(name:"summary", value:"The remote host is missing an update for the 'sudo' package(s) announced via the SSA:2021-026-01 advisory.");

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

  script_tag(name:"insight", value:"New sudo packages are available for Slackware 14.0, 14.1, 14.2, and -current to
fix security issues.


Here are the details from the Slackware 14.2 ChangeLog:
+--------------------------+
patches/packages/sudo-1.9.5p2-i586-1_slack14.2.txz: Upgraded.
 When invoked as sudoedit, the same set of command line options
 are now accepted as for 'sudo -e'. The -H and -P options are
 now rejected for sudoedit and 'sudo -e' which matches the sudo
 1.7 behavior. This is part of the fix for CVE-2021-3156.
 Fixed a potential buffer overflow when unescaping backslashes
 in the command's arguments. Normally, sudo escapes special
 characters when running a command via a shell (sudo -s or sudo
 -i). However, it was also possible to run sudoedit with the -s
 or -i flags in which case no escaping had actually been done,
 making a buffer overflow possible. This fixes CVE-2021-3156.
 For more information, see:
 [link moved to references]
 (* Security fix *)
+--------------------------+");

  script_tag(name:"affected", value:"'sudo' package(s) on Slackware 14.0, Slackware 14.1, Slackware 14.2, Slackware current.");

  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-slack.inc");

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

res = "";
report = "";

if(release == "SLK14.0") {

  if(!isnull(res = isslkpkgvuln(pkg:"sudo", ver:"1.9.5p2-i486-1_slack14.0", rls:"SLK14.0"))) {
    report += res;
  }

  if(!isnull(res = isslkpkgvuln(pkg:"sudo", ver:"1.9.5p2-x86_64-1_slack14.0", rls:"SLK14.0"))) {
    report += res;
  }

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

if(release == "SLK14.1") {

  if(!isnull(res = isslkpkgvuln(pkg:"sudo", ver:"1.9.5p2-i486-1_slack14.1", rls:"SLK14.1"))) {
    report += res;
  }

  if(!isnull(res = isslkpkgvuln(pkg:"sudo", ver:"1.9.5p2-x86_64-1_slack14.1", rls:"SLK14.1"))) {
    report += res;
  }

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

if(release == "SLK14.2") {

  if(!isnull(res = isslkpkgvuln(pkg:"sudo", ver:"1.9.5p2-i586-1_slack14.2", rls:"SLK14.2"))) {
    report += res;
  }

  if(!isnull(res = isslkpkgvuln(pkg:"sudo", ver:"1.9.5p2-x86_64-1_slack14.2", rls:"SLK14.2"))) {
    report += res;
  }

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

if(release == "SLKcurrent") {

  if(!isnull(res = isslkpkgvuln(pkg:"sudo", ver:"1.9.5p2-i586-1", rls:"SLKcurrent"))) {
    report += res;
  }

  if(!isnull(res = isslkpkgvuln(pkg:"sudo", ver:"1.9.5p2-x86_64-1", rls:"SLKcurrent"))) {
    report += res;
  }

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

exit(0);