CVSS2
Attack Vector
LOCAL
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
COMPLETE
Availability Impact
NONE
AV:L/AC:M/Au:N/C:N/I:C/A:N
CVSS3
Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
AI Score
Confidence
Low
EPSS
Percentile
15.9%
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("1.3.6.1.4.1.25623.1.1.10.2021.0539");
script_cve_id("CVE-2020-27820", "CVE-2021-4001", "CVE-2021-4002");
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:"4.7");
script_tag(name:"cvss_base_vector", value:"AV:L/AC:M/Au:N/C:N/I:C/A:N");
script_tag(name:"severity_vector", value:"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H");
script_tag(name:"severity_origin", value:"NVD");
script_tag(name:"severity_date", value:"2022-01-28 14:36:04 +0000 (Fri, 28 Jan 2022)");
script_name("Mageia: Security Advisory (MGASA-2021-0539)");
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=MAGEIA8");
script_xref(name:"Advisory-ID", value:"MGASA-2021-0539");
script_xref(name:"URL", value:"https://advisories.mageia.org/MGASA-2021-0539.html");
script_xref(name:"URL", value:"https://bugs.mageia.org/show_bug.cgi?id=29716");
script_xref(name:"URL", value:"https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.5");
script_xref(name:"URL", value:"https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.6");
script_tag(name:"summary", value:"The remote host is missing an update for the 'kernel-linus' package(s) announced via the MGASA-2021-0539 advisory.");
script_tag(name:"vuldetect", value:"Checks if a vulnerable package version is present on the target host.");
script_tag(name:"insight", value:"This kernel-linus update is based on upstream 5.15.6 and fixes at least the
following security issues:
A vulnerability was found in Linux kernel, where a use-after-frees in
nouveau's postclose() handler could happen if removing device (that is
not common to remove video card physically without power-off, but same
happens if 'unbind' the driver) (CVE-2020-27820).
A race condition when the eBPF map is frozen (CVE-2021-4001).
A memory leak flaw in the Linux kernel's hugetlbfs memory usage was found
in the way the user maps some regions of memory twice using shmget() which
are aligned to PUD alignment with the fault of some of the memory pages.
A local user could use this flaw to get unauthorized access to some data
(CVE-2021-4002).
For other upstream fixes, see the referenced changelogs.");
script_tag(name:"affected", value:"'kernel-linus' package(s) on 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 == "MAGEIA8") {
if(!isnull(res = isrpmvuln(pkg:"kernel-linus-5.15.6-1.mga8", rpm:"kernel-linus-5.15.6-1.mga8~1~1.mga8", rls:"MAGEIA8"))) {
report += res;
}
if(!isnull(res = isrpmvuln(pkg:"kernel-linus", rpm:"kernel-linus~5.15.6~1.mga8", rls:"MAGEIA8"))) {
report += res;
}
if(!isnull(res = isrpmvuln(pkg:"kernel-linus-devel-5.15.6-1.mga8", rpm:"kernel-linus-devel-5.15.6-1.mga8~1~1.mga8", rls:"MAGEIA8"))) {
report += res;
}
if(!isnull(res = isrpmvuln(pkg:"kernel-linus-devel-latest", rpm:"kernel-linus-devel-latest~5.15.6~1.mga8", rls:"MAGEIA8"))) {
report += res;
}
if(!isnull(res = isrpmvuln(pkg:"kernel-linus-doc", rpm:"kernel-linus-doc~5.15.6~1.mga8", rls:"MAGEIA8"))) {
report += res;
}
if(!isnull(res = isrpmvuln(pkg:"kernel-linus-latest", rpm:"kernel-linus-latest~5.15.6~1.mga8", rls:"MAGEIA8"))) {
report += res;
}
if(!isnull(res = isrpmvuln(pkg:"kernel-linus-source-5.15.6-1.mga8", rpm:"kernel-linus-source-5.15.6-1.mga8~1~1.mga8", rls:"MAGEIA8"))) {
report += res;
}
if(!isnull(res = isrpmvuln(pkg:"kernel-linus-source-latest", rpm:"kernel-linus-source-latest~5.15.6~1.mga8", rls:"MAGEIA8"))) {
report += res;
}
if(report != "") {
security_message(data:report);
} else if(__pkg_match) {
exit(99);
}
exit(0);
}
exit(0);
CVSS2
Attack Vector
LOCAL
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
COMPLETE
Availability Impact
NONE
AV:L/AC:M/Au:N/C:N/I:C/A:N
CVSS3
Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
AI Score
Confidence
Low
EPSS
Percentile
15.9%