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openvasCopyright (C) 2021 Greenbone AGOPENVAS:1361412562310704953
HistoryAug 12, 2021 - 12:00 a.m.

Debian: Security Advisory (DSA-4953-1)

2021-08-1200:00:00
Copyright (C) 2021 Greenbone AG
plugins.openvas.org
8
debian
security advisory
dsa-4953-1
lynx
thorsten glaser
axel beckert
web browser
userinfo
uri
credentials
cleartext
sni
update
package(s)

CVSS2

2.6

Attack Vector

NETWORK

Attack Complexity

HIGH

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

AV:N/AC:H/Au:N/C:P/I:N/A:N

CVSS3

5.3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N

AI Score

5.7

Confidence

High

EPSS

0.006

Percentile

78.9%

The remote host is missing an update for the Debian

# SPDX-FileCopyrightText: 2021 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("1.3.6.1.4.1.25623.1.0.704953");
  script_cve_id("CVE-2021-38165");
  script_tag(name:"creation_date", value:"2021-08-12 03:00:07 +0000 (Thu, 12 Aug 2021)");
  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:"2.6");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:H/Au:N/C:P/I:N/A:N");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2021-08-24 16:36:00 +0000 (Tue, 24 Aug 2021)");

  script_name("Debian: Security Advisory (DSA-4953-1)");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2021 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-4953-1");
  script_xref(name:"URL", value:"https://www.debian.org/security/2021/DSA-4953-1");
  script_xref(name:"URL", value:"https://security-tracker.debian.org/tracker/DSA-4953");
  script_xref(name:"URL", value:"https://security-tracker.debian.org/tracker/lynx");

  script_tag(name:"summary", value:"The remote host is missing an update for the Debian 'lynx' package(s) announced via the DSA-4953-1 advisory.");

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

  script_tag(name:"insight", value:"Thorsten Glaser and Axel Beckert reported that lynx, a non-graphical (text-mode) web browser, does not properly handle the userinfo subcomponent of a URI, which can lead to leaking of credential in cleartext in SNI data.

For the stable distribution (buster), this problem has been fixed in version 2.8.9rel.1-3+deb10u1.

We recommend that you upgrade your lynx packages.

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

  script_tag(name:"affected", value:"'lynx' 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:"lynx", ver:"2.8.9rel.1-3+deb10u1", rls:"DEB10"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"lynx-common", ver:"2.8.9rel.1-3+deb10u1", rls:"DEB10"))) {
    report += res;
  }

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

exit(0);

CVSS2

2.6

Attack Vector

NETWORK

Attack Complexity

HIGH

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

AV:N/AC:H/Au:N/C:P/I:N/A:N

CVSS3

5.3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N

AI Score

5.7

Confidence

High

EPSS

0.006

Percentile

78.9%