CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS
Percentile
64.8%
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("1.3.6.1.4.1.25623.1.0.704961");
script_cve_id("CVE-2021-38385");
script_tag(name:"creation_date", value:"2021-08-24 03:00:10 +0000 (Tue, 24 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:"5.0");
script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:N/I:N/A:P");
script_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H");
script_tag(name:"severity_origin", value:"NVD");
script_tag(name:"severity_date", value:"2021-09-02 02:18:02 +0000 (Thu, 02 Sep 2021)");
script_name("Debian: Security Advisory (DSA-4961-1)");
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=DEB(10|11)");
script_xref(name:"Advisory-ID", value:"DSA-4961-1");
script_xref(name:"URL", value:"https://www.debian.org/security/2021/DSA-4961-1");
script_xref(name:"URL", value:"https://security-tracker.debian.org/tracker/DSA-4961");
script_xref(name:"URL", value:"https://security-tracker.debian.org/tracker/tor");
script_tag(name:"summary", value:"The remote host is missing an update for the Debian 'tor' package(s) announced via the DSA-4961-1 advisory.");
script_tag(name:"vuldetect", value:"Checks if a vulnerable package version is present on the target host.");
script_tag(name:"insight", value:"Henry de Valence reported a flaw in the signature verification code in Tor, a connection-based low-latency anonymous communication system. A remote attacker can take advantage of this flaw to cause an assertion failure, resulting in denial of service.
For the oldstable distribution (buster), this problem has been fixed in version 0.3.5.16-1.
For the stable distribution (bullseye), this problem has been fixed in version 0.4.5.10-1~deb11u1.
We recommend that you upgrade your tor packages.
For the detailed security status of tor please refer to its security tracker page at: [link moved to references]");
script_tag(name:"affected", value:"'tor' package(s) on Debian 10, Debian 11.");
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:"tor", ver:"0.3.5.16-1", rls:"DEB10"))) {
report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"tor-geoipdb", ver:"0.3.5.16-1", rls:"DEB10"))) {
report += res;
}
if(report != "") {
security_message(data:report);
} else if(__pkg_match) {
exit(99);
}
exit(0);
}
if(release == "DEB11") {
if(!isnull(res = isdpkgvuln(pkg:"tor", ver:"0.4.5.10-1~deb11u1", rls:"DEB11"))) {
report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"tor-geoipdb", ver:"0.4.5.10-1~deb11u1", rls:"DEB11"))) {
report += res;
}
if(report != "") {
security_message(data:report);
} else if(__pkg_match) {
exit(99);
}
exit(0);
}
exit(0);
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS
Percentile
64.8%