Debian: Security Advisory (DLA-3266-1)

# SPDX-FileCopyrightText: 2023 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("1.3.6.1.4.1.25623.1.0.893266");
  script_cve_id("CVE-2023-22456", "CVE-2023-22464");
  script_tag(name:"creation_date", value:"2023-01-12 02:00:20 +0000 (Thu, 12 Jan 2023)");
  script_version("2024-02-02T05:06:10+0000");
  script_tag(name:"last_modification", value:"2024-02-02 05:06:10 +0000 (Fri, 02 Feb 2024)");
  script_tag(name:"cvss_base", value:"6.4");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:P/I:P/A:N");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2023-01-11 16:07:33 +0000 (Wed, 11 Jan 2023)");

  script_name("Debian: Security Advisory (DLA-3266-1)");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2023 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=DEB10");

  script_xref(name:"Advisory-ID", value:"DLA-3266-1");
  script_xref(name:"URL", value:"https://www.debian.org/lts/security/2023/DLA-3266-1");
  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 'viewvc' package(s) announced via the DLA-3266-1 advisory.");

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

  script_tag(name:"insight", value:"It was discovered that there were two issues in viewvc, a web-based interface for browsing Subversion and CVS repositories. The attack vectors involved files with unsafe names, names that, when embedded into an HTML stream, could cause the browser to run unwanted code.

CVE-2023-22456

ViewVC, a browser interface for CVS and Subversion version control repositories, as a cross-site scripting vulnerability that affects versions prior to 1.2.2 and 1.1.29. The impact of this vulnerability is mitigated by the need for an attacker to have commit privileges to a Subversion repository exposed by an otherwise trusted ViewVC instance. The attack vector involves files with unsafe names (names that, when embedded into an HTML stream, would cause the browser to run unwanted code), which themselves can be challenging to create. Users should update to at least version 1.2.2 (if they are using a 1.2.x version of ViewVC) or 1.1.29 (if they are using a 1.1.x version). ViewVC 1.0.x is no longer supported, so users of that release lineage should implement a workaround. Users can edit their ViewVC EZT view templates to manually HTML-escape changed paths during rendering. Locate in your template set's `revision.ezt` file references to those changed paths, and wrap them with `[format 'html']` and `[end]`. For most users, that means that references to `[changes.path]` will become `[format 'html'][changes.path][end]`. (This workaround should be reverted after upgrading to a patched version of ViewVC, else changed path names will be doubly escaped.)

CVE-2023-22464

ViewVC is a browser interface for CVS and Subversion version control repositories. Versions prior to 1.2.3 and 1.1.30 are vulnerable to cross-site scripting. The impact of this vulnerability is mitigated by the need for an attacker to have commit privileges to a Subversion repository exposed by an otherwise trusted ViewVC instance. The attack vector involves files with unsafe names (names that, when embedded into an HTML stream, would cause the browser to run unwanted code), which themselves can be challenging to create. Users should update to at least version 1.2.3 (if they are using a 1.2.x version of ViewVC) or 1.1.30 (if they are using a 1.1.x version). ViewVC 1.0.x is no longer supported, so users of that release lineage should implement one of the following workarounds. Users can edit their ViewVC EZT view templates to manually HTML-escape changed path 'copyfrom paths' during rendering. Locate in your template set's `revision.ezt` file references to those changed paths, and wrap them with `[format 'html']` and `[end]`. For most users, that means that references to `[changes.copy_path]` will become `[format 'html'][changes.copy_path][end]`. (This workaround should be reverted after upgrading to a patched version of ViewVC, else 'copyfrom path' names will be doubly escaped.)

For Debian 10 Buster, these problems have been fixed in ... [Please see the references for more information on the vulnerabilities]");

  script_tag(name:"affected", value:"'viewvc' package(s) on Debian 10.");

  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 == "DEB10") {

  if(!isnull(res = isdpkgvuln(pkg:"viewvc", ver:"1.1.26-1+deb10u1", rls:"DEB10"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"viewvc-query", ver:"1.1.26-1+deb10u1", rls:"DEB10"))) {
    report += res;
  }

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

exit(0);