Debian: Security Advisory (DLA-1414-1)

# SPDX-FileCopyrightText: 2018 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("1.3.6.1.4.1.25623.1.0.891414");
  script_cve_id("CVE-2017-17458", "CVE-2017-9462", "CVE-2018-1000132", "CVE-2018-13346", "CVE-2018-13347", "CVE-2018-13348");
  script_tag(name:"creation_date", value:"2018-07-09 22:00:00 +0000 (Mon, 09 Jul 2018)");
  script_version("2024-02-02T05:06:06+0000");
  script_tag(name:"last_modification", value:"2024-02-02 05:06:06 +0000 (Fri, 02 Feb 2024)");
  script_tag(name:"cvss_base", value:"10.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:C/I:C/A:C");
  script_tag(name:"severity_vector", value:"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2018-09-06 17:47:11 +0000 (Thu, 06 Sep 2018)");

  script_name("Debian: Security Advisory (DLA-1414-1)");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2018 Greenbone AG");
  script_family("Debian Local Security Checks");
  script_dependencies("gather-package-list.nasl");
  script_mandatory_keys("ssh/login/debian_linux", "ssh/login/packages", re:"ssh/login/release=DEB8");

  script_xref(name:"Advisory-ID", value:"DLA-1414-1");
  script_xref(name:"URL", value:"https://www.debian.org/lts/security/2018/DLA-1414-1");
  script_xref(name:"URL", value:"https://wiki.debian.org/LTS");

  script_tag(name:"summary", value:"The remote host is missing an update for the Debian 'mercurial' package(s) announced via the DLA-1414-1 advisory.");

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

  script_tag(name:"insight", value:"Some security vulnerabilities were found in Mercurial which allow authenticated users to trigger arbitrary code execution and unauthorized data access in certain server configuration. Malformed patches and repositories can also lead to crashes and arbitrary code execution on clients.

CVE-2017-9462

In Mercurial before 4.1.3, 'hg serve --stdio' allows remote authenticated users to launch the Python debugger, and consequently execute arbitrary code, by using --debugger as a repository name.

CVE-2017-17458

In Mercurial before 4.4.1, it is possible that a specially malformed repository can cause Git subrepositories to run arbitrary code in the form of a .git/hooks/post-update script checked into the repository. Typical use of Mercurial prevents construction of such repositories, but they can be created programmatically.

CVE-2018-1000132

Mercurial version 4.5 and earlier contains a Incorrect Access Control (CWE-285) vulnerability in Protocol server that can result in Unauthorized data access. This attack appear to be exploitable via network connectivity. This vulnerability appears to have been fixed in 4.5.1.

OVE-20180430-0001 mpatch: be more careful about parsing binary patch data

OVE-20180430-0002 mpatch: protect against underflow in mpatch_apply

OVE-20180430-0004 mpatch: ensure fragment start isn't past the end of orig

For Debian 8 Jessie, these problems have been fixed in version 3.1.2-2+deb8u5.

We recommend that you upgrade your mercurial packages.

Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: [link moved to references]");

  script_tag(name:"affected", value:"'mercurial' package(s) on Debian 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-deb.inc");

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

res = "";
report = "";

if(release == "DEB8") {

  if(!isnull(res = isdpkgvuln(pkg:"mercurial", ver:"3.1.2-2+deb8u5", rls:"DEB8"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"mercurial-common", ver:"3.1.2-2+deb8u5", rls:"DEB8"))) {
    report += res;
  }

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

exit(0);