Debian: Security Advisory (DSA-3828-1)

# SPDX-FileCopyrightText: 2017 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("1.3.6.1.4.1.25623.1.0.703828");
  script_tag(name:"creation_date", value:"2017-04-09 22:00:00 +0000 (Sun, 09 Apr 2017)");
  script_version("2024-01-12T16:12:11+0000");
  script_tag(name:"last_modification", value:"2024-01-12 16:12:11 +0000 (Fri, 12 Jan 2024)");
  script_tag(name:"cvss_base", value:"5.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:P/I:N/A:N");

  script_name("Debian: Security Advisory (DSA-3828-1)");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2017 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:"DSA-3828-1");
  script_xref(name:"URL", value:"https://www.debian.org/security/2017/DSA-3828-1");
  script_xref(name:"URL", value:"https://security-tracker.debian.org/tracker/DSA-3828");

  script_tag(name:"summary", value:"The remote host is missing an update for the Debian 'dovecot' package(s) announced via the DSA-3828-1 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 the Dovecot email server is vulnerable to a denial of service attack. When the dict passdb and userdb are used for user authentication, the username sent by the IMAP/POP3 client is sent through var_expand() to perform %variable expansion. Sending specially crafted %variable fields could result in excessive memory usage causing the process to crash (and restart).

For the stable distribution (jessie), this problem has been fixed in version 1:2.2.13-12~deb8u2.

We recommend that you upgrade your dovecot packages.");

  script_tag(name:"affected", value:"'dovecot' 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:"dovecot-core", ver:"1:2.2.13-12~deb8u2", rls:"DEB8"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"dovecot-dbg", ver:"1:2.2.13-12~deb8u2", rls:"DEB8"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"dovecot-dev", ver:"1:2.2.13-12~deb8u2", rls:"DEB8"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"dovecot-gssapi", ver:"1:2.2.13-12~deb8u2", rls:"DEB8"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"dovecot-imapd", ver:"1:2.2.13-12~deb8u2", rls:"DEB8"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"dovecot-ldap", ver:"1:2.2.13-12~deb8u2", rls:"DEB8"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"dovecot-lmtpd", ver:"1:2.2.13-12~deb8u2", rls:"DEB8"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"dovecot-lucene", ver:"1:2.2.13-12~deb8u2", rls:"DEB8"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"dovecot-managesieved", ver:"1:2.2.13-12~deb8u2", rls:"DEB8"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"dovecot-mysql", ver:"1:2.2.13-12~deb8u2", rls:"DEB8"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"dovecot-pgsql", ver:"1:2.2.13-12~deb8u2", rls:"DEB8"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"dovecot-pop3d", ver:"1:2.2.13-12~deb8u2", rls:"DEB8"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"dovecot-sieve", ver:"1:2.2.13-12~deb8u2", rls:"DEB8"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"dovecot-solr", ver:"1:2.2.13-12~deb8u2", rls:"DEB8"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"dovecot-sqlite", ver:"1:2.2.13-12~deb8u2", rls:"DEB8"))) {
    report += res;
  }

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

exit(0);