Mageia: Security Advisory (MGASA-2021-0196)

# 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("1.3.6.1.4.1.25623.1.1.10.2021.0196");
  script_cve_id("CVE-2019-25017", "CVE-2019-25018");
  script_tag(name:"creation_date", value:"2022-01-28 10:58:44 +0000 (Fri, 28 Jan 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:"5.8");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:N/C:N/I:P/A:P");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2021-02-05 15:18:29 +0000 (Fri, 05 Feb 2021)");

  script_name("Mageia: Security Advisory (MGASA-2021-0196)");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2022 Greenbone AG");
  script_family("Mageia Linux Local Security Checks");
  script_dependencies("gather-package-list.nasl");
  script_mandatory_keys("ssh/login/mageia_linux", "ssh/login/release", re:"ssh/login/release=MAGEIA(7|8)");

  script_xref(name:"Advisory-ID", value:"MGASA-2021-0196");
  script_xref(name:"URL", value:"https://advisories.mageia.org/MGASA-2021-0196.html");
  script_xref(name:"URL", value:"https://bugs.mageia.org/show_bug.cgi?id=28460");
  script_xref(name:"URL", value:"https://lists.suse.com/pipermail/sle-security-updates/2021-February/008353.html");

  script_tag(name:"summary", value:"The remote host is missing an update for the 'krb5-appl' package(s) announced via the MGASA-2021-0196 advisory.");

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

  script_tag(name:"insight", value:"An issue was discovered in rcp in MIT krb5-appl through 1.0.3. Due to the rcp
implementation being derived from 1983 rcp, the server chooses which
files/directories are sent to the client. However, the rcp client only
performs cursory validation of the object name returned (only directory
traversal attacks are prevented). A malicious rcp server (or
Man-in-The-Middle attacker) can overwrite arbitrary files in the rcp client
target directory. If recursive operation (-r) is performed, the server can
manipulate subdirectories as well (for example, to overwrite the
.ssh/authorized_keys file). This issue is similar to CVE-2019-6111 and
CVE-2019-7283 (CVE-2019-25017).

In the rcp client in MIT krb5-appl through 1.0.3 malicious servers could
bypass intended access restrictions via the filename of . or an empty
filename, similar to CVE-2018-20685 and CVE-2019-7282. The impact is modifying
the permissions of the target directory on the client side (CVE-2019-25018).");

  script_tag(name:"affected", value:"'krb5-appl' package(s) on Mageia 7, Mageia 8.");

  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 == "MAGEIA7") {

  if(!isnull(res = isrpmvuln(pkg:"krb5-appl", rpm:"krb5-appl~1.0.3~10.2.mga7", rls:"MAGEIA7"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"krb5-appl-clients", rpm:"krb5-appl-clients~1.0.3~10.2.mga7", rls:"MAGEIA7"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"krb5-appl-servers", rpm:"krb5-appl-servers~1.0.3~10.2.mga7", rls:"MAGEIA7"))) {
    report += res;
  }

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

if(release == "MAGEIA8") {

  if(!isnull(res = isrpmvuln(pkg:"krb5-appl", rpm:"krb5-appl~1.0.3~13.1.mga8", rls:"MAGEIA8"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"krb5-appl-clients", rpm:"krb5-appl-clients~1.0.3~13.1.mga8", rls:"MAGEIA8"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"krb5-appl-servers", rpm:"krb5-appl-servers~1.0.3~13.1.mga8", rls:"MAGEIA8"))) {
    report += res;
  }

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

exit(0);