The remote host is missing an update for the Debian 'denyhosts' package(s) due to a vulnerability in the tool preventing SSH brute-force attacks
Reporter | Title | Published | Views | Family All 22 |
---|---|---|---|---|
![]() | denyhosts DoS | 24 Dec 201300:00 | – | securityvulns |
![]() | [SECURITY] [DSA 2826-1] denyhosts security update | 24 Dec 201300:00 | – | securityvulns |
![]() | CVE-2013-6890 | 23 Dec 201322:00 | – | cvelist |
![]() | Debian DSA-2826-1 : denyhosts - remote denial of ssh service | 23 Dec 201300:00 | – | nessus |
![]() | GLSA-201406-23 : DenyHosts: Denial of Service | 26 Jun 201400:00 | – | nessus |
![]() | Fedora 20 : denyhosts-2.6-29.fc20.1 (2014-17067) | 6 Jan 201500:00 | – | nessus |
![]() | Fedora 19 : denyhosts-2.6-28.fc19.1 (2014-17081) | 6 Jan 201500:00 | – | nessus |
![]() | Fedora Update for denyhosts FEDORA-2014-17067 | 5 Jan 201500:00 | – | openvas |
![]() | Mageia: Security Advisory (MGASA-2014-0080) | 28 Jan 202200:00 | – | openvas |
![]() | Debian Security Advisory DSA 2826-1 (denyhosts - Remote denial of ssh service) | 22 Dec 201300:00 | – | openvas |
Source | Link |
---|---|
security-tracker | www.security-tracker.debian.org/tracker/DSA-2826 |
debian | www.debian.org/security/2013/DSA-2826-1 |
# SPDX-FileCopyrightText: 2013 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("1.3.6.1.4.1.25623.1.0.702826");
script_cve_id("CVE-2013-6890");
script_tag(name:"creation_date", value:"2013-12-21 23:00:00 +0000 (Sat, 21 Dec 2013)");
script_version("2024-02-02T05:06:04+0000");
script_tag(name:"last_modification", value:"2024-02-02 05:06:04 +0000 (Fri, 02 Feb 2024)");
script_tag(name:"cvss_base", value:"5.0");
script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:N/I:N/A:P");
script_name("Debian: Security Advisory (DSA-2826-1)");
script_category(ACT_GATHER_INFO);
script_copyright("Copyright (C) 2013 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=DEB(6|7)");
script_xref(name:"Advisory-ID", value:"DSA-2826-1");
script_xref(name:"URL", value:"https://www.debian.org/security/2013/DSA-2826-1");
script_xref(name:"URL", value:"https://security-tracker.debian.org/tracker/DSA-2826");
script_tag(name:"summary", value:"The remote host is missing an update for the Debian 'denyhosts' package(s) announced via the DSA-2826-1 advisory.");
script_tag(name:"vuldetect", value:"Checks if a vulnerable package version is present on the target host.");
script_tag(name:"insight", value:"Helmut Grohne discovered that denyhosts, a tool preventing SSH brute-force attacks, could be used to perform remote denial of service against the SSH daemon. Incorrectly specified regular expressions used to detect brute force attacks in authentication logs could be exploited by a malicious user to forge crafted login names in order to make denyhosts ban arbitrary IP addresses.
For the oldstable distribution (squeeze), this problem has been fixed in version 2.6-7+deb6u2.
For the stable distribution (wheezy), this problem has been fixed in version 2.6-10+deb7u2.
For the testing distribution (jessie), this problem has been fixed in version 2.6-10.1.
For the unstable distribution (sid), this problem has been fixed in version 2.6-10.1.
We recommend that you upgrade your denyhosts packages.");
script_tag(name:"affected", value:"'denyhosts' package(s) on Debian 6, Debian 7.");
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 == "DEB6") {
if(!isnull(res = isdpkgvuln(pkg:"denyhosts", ver:"2.6-7+deb6u2", rls:"DEB6"))) {
report += res;
}
if(report != "") {
security_message(data:report);
} else if(__pkg_match) {
exit(99);
}
exit(0);
}
if(release == "DEB7") {
if(!isnull(res = isdpkgvuln(pkg:"denyhosts", ver:"2.6-10+deb7u2", rls:"DEB7"))) {
report += res;
}
if(report != "") {
security_message(data:report);
} else if(__pkg_match) {
exit(99);
}
exit(0);
}
exit(0);
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