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
AI Score
Confidence
High
EPSS
Percentile
81.2%
The remote host is missing an update for the
# SPDX-FileCopyrightText: 2022 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("1.3.6.1.4.1.25623.1.1.10.2021.0293");
script_cve_id("CVE-2021-34548", "CVE-2021-34549", "CVE-2021-34550");
script_tag(name:"creation_date", value:"2022-01-28 10:58:44 +0000 (Fri, 28 Jan 2022)");
script_version("2024-02-02T05:06:09+0000");
script_tag(name:"last_modification", value:"2024-02-02 05:06:09 +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:"2021-07-06 13:48:04 +0000 (Tue, 06 Jul 2021)");
script_name("Mageia: Security Advisory (MGASA-2021-0293)");
script_category(ACT_GATHER_INFO);
script_copyright("Copyright (C) 2022 Greenbone AG");
script_family("Mageia Linux Local Security Checks");
script_dependencies("gather-package-list.nasl");
script_mandatory_keys("ssh/login/mageia_linux", "ssh/login/release", re:"ssh/login/release=MAGEIA(7|8)");
script_xref(name:"Advisory-ID", value:"MGASA-2021-0293");
script_xref(name:"URL", value:"https://advisories.mageia.org/MGASA-2021-0293.html");
script_xref(name:"URL", value:"https://bugs.mageia.org/show_bug.cgi?id=29136");
script_xref(name:"URL", value:"https://bugs.mageia.org/show_bug.cgi?id=29158");
script_xref(name:"URL", value:"https://blog.torproject.org/node/2041");
script_xref(name:"URL", value:"https://lists.fedoraproject.org/archives/list/[email protected]/thread/RST7YTNTKJURIR2QVIJMEBXWW2YHETRX/");
script_tag(name:"summary", value:"The remote host is missing an update for the 'tor' package(s) announced via the MGASA-2021-0293 advisory.");
script_tag(name:"vuldetect", value:"Checks if a vulnerable package version is present on the target host.");
script_tag(name:"insight", value:"Don't allow relays to spoof RELAY_END or RELAY_RESOLVED cell on half-closed
streams. Previously, clients failed to validate which hop sent these cells:
this would allow a relay on a circuit to end a stream that wasn't actually
built with it (CVE-2021-34548).
hashtable-based CPU denial-of-service attack against relays (CVE-2021-34549).
out-of-bounds memory access in v3 onion service descriptor parsing
(CVE-2021-34550).
See also upstream release notes for included other bugfixes.
This package also fixes an error in tor package's un-install script (mga#29158).");
script_tag(name:"affected", value:"'tor' package(s) on Mageia 7, Mageia 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-rpm.inc");
release = rpm_get_ssh_release();
if(!release)
exit(0);
res = "";
report = "";
if(release == "MAGEIA7") {
if(!isnull(res = isrpmvuln(pkg:"tor", rpm:"tor~0.3.5.15~1.1.mga7", rls:"MAGEIA7"))) {
report += res;
}
if(report != "") {
security_message(data:report);
} else if(__pkg_match) {
exit(99);
}
exit(0);
}
if(release == "MAGEIA8") {
if(!isnull(res = isrpmvuln(pkg:"tor", rpm:"tor~0.3.5.15~1.1.mga8", rls:"MAGEIA8"))) {
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
AI Score
Confidence
High
EPSS
Percentile
81.2%