Debian: Security Advisory (DSA-4757-1)

# SPDX-FileCopyrightText: 2020 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("1.3.6.1.4.1.25623.1.0.704757");
  script_cve_id("CVE-2020-11984", "CVE-2020-11993", "CVE-2020-1927", "CVE-2020-1934", "CVE-2020-9490");
  script_tag(name:"creation_date", value:"2020-09-01 03:00:12 +0000 (Tue, 01 Sep 2020)");
  script_version("2024-02-02T05:06:07+0000");
  script_tag(name:"last_modification", value:"2024-02-02 05:06:07 +0000 (Fri, 02 Feb 2024)");
  script_tag(name:"cvss_base", value:"7.5");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:P/I:P/A:P");
  script_tag(name:"severity_vector", value:"CVSS:3.1/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:"2020-08-09 21:42:54 +0000 (Sun, 09 Aug 2020)");

  script_name("Debian: Security Advisory (DSA-4757-1)");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2020 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:"DSA-4757-1");
  script_xref(name:"URL", value:"https://www.debian.org/security/2020/DSA-4757-1");
  script_xref(name:"URL", value:"https://security-tracker.debian.org/tracker/DSA-4757");
  script_xref(name:"URL", value:"https://security-tracker.debian.org/tracker/apache2");

  script_tag(name:"summary", value:"The remote host is missing an update for the Debian 'apache2' package(s) announced via the DSA-4757-1 advisory.");

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

  script_tag(name:"insight", value:"Several vulnerabilities have been found in the Apache HTTPD server.

CVE-2020-1927

Fabrice Perez reported that certain mod_rewrite configurations are prone to an open redirect.

CVE-2020-1934

Chamal De Silva discovered that the mod_proxy_ftp module uses uninitialized memory when proxying to a malicious FTP backend.

CVE-2020-9490

Felix Wilhelm discovered that a specially crafted value for the 'Cache-Digest' header in a HTTP/2 request could cause a crash when the server actually tries to HTTP/2 PUSH a resource afterwards.

CVE-2020-11984

Felix Wilhelm reported a buffer overflow flaw in the mod_proxy_uwsgi module which could result in information disclosure or potentially remote code execution.

CVE-2020-11993

Felix Wilhelm reported that when trace/debug was enabled for the HTTP/2 module certain traffic edge patterns can cause logging statements on the wrong connection, causing concurrent use of memory pools.

For the stable distribution (buster), these problems have been fixed in version 2.4.38-3+deb10u4.

We recommend that you upgrade your apache2 packages.

For the detailed security status of apache2 please refer to its security tracker page at: [link moved to references]");

  script_tag(name:"affected", value:"'apache2' 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:"apache2", ver:"2.4.38-3+deb10u4", rls:"DEB10"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"apache2-bin", ver:"2.4.38-3+deb10u4", rls:"DEB10"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"apache2-data", ver:"2.4.38-3+deb10u4", rls:"DEB10"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"apache2-dev", ver:"2.4.38-3+deb10u4", rls:"DEB10"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"apache2-doc", ver:"2.4.38-3+deb10u4", rls:"DEB10"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"apache2-ssl-dev", ver:"2.4.38-3+deb10u4", rls:"DEB10"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"apache2-suexec-custom", ver:"2.4.38-3+deb10u4", rls:"DEB10"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"apache2-suexec-pristine", ver:"2.4.38-3+deb10u4", rls:"DEB10"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"apache2-utils", ver:"2.4.38-3+deb10u4", rls:"DEB10"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"libapache2-mod-md", ver:"2.4.38-3+deb10u4", rls:"DEB10"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"libapache2-mod-proxy-uwsgi", ver:"2.4.38-3+deb10u4", rls:"DEB10"))) {
    report += res;
  }

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

exit(0);