SUSE: Security Advisory (SUSE-SU-2021:4052-1)

# SPDX-FileCopyrightText: 2021 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("1.3.6.1.4.1.25623.1.1.4.2021.4052.1");
  script_cve_id("CVE-2021-0935", "CVE-2021-28688");
  script_tag(name:"creation_date", value:"2021-12-15 03:22:16 +0000 (Wed, 15 Dec 2021)");
  script_version("2024-02-02T14:37:50+0000");
  script_tag(name:"last_modification", value:"2024-02-02 14:37:50 +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:H/UI:N/S:U/C:H/I:H/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2021-10-26 16:48:54 +0000 (Tue, 26 Oct 2021)");

  script_name("SUSE: Security Advisory (SUSE-SU-2021:4052-1)");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2021 Greenbone AG");
  script_family("SuSE Local Security Checks");
  script_dependencies("gather-package-list.nasl");
  script_mandatory_keys("ssh/login/suse_sles", "ssh/login/rpms", re:"ssh/login/release=(SLES12\.0SP3)");

  script_xref(name:"Advisory-ID", value:"SUSE-SU-2021:4052-1");
  script_xref(name:"URL", value:"https://www.suse.com/support/update/announcement/2021/suse-su-20214052-1/");

  script_tag(name:"summary", value:"The remote host is missing an update for the 'Linux Kernel (Live Patch 41 for SLE 12 SP3)' package(s) announced via the SUSE-SU-2021:4052-1 advisory.");

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

  script_tag(name:"insight", value:"This update for the Linux Kernel 4.4.180-94_150 fixes several issues.

The following security issues were fixed:

CVE-2021-0935: In ip6_xmit of ip6_output.c, there is a possible out of
 bounds write due to a use after free. This could lead to local
 escalation of privilege with System execution privileges needed. User
 interaction is not needed for exploitation. (bsc#1192032)

CVE-2021-28688: The fix for XSA-365 includes initialization of pointers
 such that subsequent cleanup code wouldn't use uninitialized or stale
 values. This initialization went too far and may under certain
 conditions also overwrite pointers which are in need of cleaning up. The
 lack of cleanup would result in leaking persistent grants. The leak in
 turn would prevent fully cleaning up after a respective guest has died,
 leaving around zombie domains. (bsc#1183646)");

  script_tag(name:"affected", value:"'Linux Kernel (Live Patch 41 for SLE 12 SP3)' package(s) on SUSE Linux Enterprise Server 12-SP3, SUSE Linux Enterprise Server for SAP 12-SP3.");

  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 == "SLES12.0SP3") {

  if(!isnull(res = isrpmvuln(pkg:"kgraft-patch-4_4_180-94_150-default", rpm:"kgraft-patch-4_4_180-94_150-default~2~2.1", rls:"SLES12.0SP3"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"kgraft-patch-4_4_180-94_150-default-debuginfo", rpm:"kgraft-patch-4_4_180-94_150-default-debuginfo~2~2.1", rls:"SLES12.0SP3"))) {
    report += res;
  }

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

exit(0);