7.5 High
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
9.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
8.2 High
AI Score
Confidence
High
0.021 Low
EPSS
Percentile
89.1%
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("1.3.6.1.4.1.25623.1.1.10.2017.0420");
script_cve_id("CVE-2017-11462", "CVE-2017-15088", "CVE-2017-7562");
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:"7.5");
script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:P/I:P/A:P");
script_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
script_tag(name:"severity_origin", value:"NVD");
script_tag(name:"severity_date", value:"2017-12-12 18:05:37 +0000 (Tue, 12 Dec 2017)");
script_name("Mageia: Security Advisory (MGASA-2017-0420)");
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(5|6)");
script_xref(name:"Advisory-ID", value:"MGASA-2017-0420");
script_xref(name:"URL", value:"https://advisories.mageia.org/MGASA-2017-0420.html");
script_xref(name:"URL", value:"https://bugs.mageia.org/show_bug.cgi?id=21628");
script_xref(name:"URL", value:"https://lists.fedoraproject.org/archives/list/[email protected]/thread/2XIPFDWKYB3HQKSWLVJ6AAPFEG6BEPE3/");
script_xref(name:"URL", value:"https://lists.fedoraproject.org/archives/list/[email protected]/thread/2FPRUP4YVOEBGEROUYWZFEQ64HTMGNED/");
script_xref(name:"URL", value:"https://lists.opensuse.org/opensuse-updates/2017-11/msg00039.html");
script_tag(name:"summary", value:"The remote host is missing an update for the 'krb5' package(s) announced via the MGASA-2017-0420 advisory.");
script_tag(name:"vuldetect", value:"Checks if a vulnerable package version is present on the target host.");
script_tag(name:"insight", value:"An authentication bypass flaw was found in the way krb5's certauth
interface handled the validation of client certificates. A remote
attacker able to communicate with the KDC could potentially use this
flaw to impersonate arbitrary principals under rare and erroneous
circumstances (CVE-2017-7562).
Note that this issue only affects Mageia 6.
RFC 2744 permits a GSS-API implementation to delete an existing security
context on a second or subsequent call to gss_init_sec_context() or
gss_accept_sec_context() if the call results in an error. This API
behavior has been found to be dangerous, leading to the possibility of
memory errors in some callers. For safety, GSS-API implementations
should instead preserve existing security contexts on error until the
caller deletes them (CVE-2017-11462).
A buffer overflow vulnerability was found in get_matching_data()
function when both the CA cert and the user cert have a long subject
affecting krb5 that includes certauth plugin. Attack requires a
validated certificate with a long subject and issuer, and a
'pkinit_cert_match' string attribute on some principal in the database.
A remote code execution exploit might also require that the attacker
gets to choose the contents of the issuer in the validated cert
(CVE-2017-15088).");
script_tag(name:"affected", value:"'krb5' package(s) on Mageia 5, Mageia 6.");
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 == "MAGEIA5") {
if(!isnull(res = isrpmvuln(pkg:"krb5", rpm:"krb5~1.12.5~1.3.mga5", rls:"MAGEIA5"))) {
report += res;
}
if(!isnull(res = isrpmvuln(pkg:"krb5-pkinit-openssl", rpm:"krb5-pkinit-openssl~1.12.5~1.3.mga5", rls:"MAGEIA5"))) {
report += res;
}
if(!isnull(res = isrpmvuln(pkg:"krb5-server", rpm:"krb5-server~1.12.5~1.3.mga5", rls:"MAGEIA5"))) {
report += res;
}
if(!isnull(res = isrpmvuln(pkg:"krb5-server-ldap", rpm:"krb5-server-ldap~1.12.5~1.3.mga5", rls:"MAGEIA5"))) {
report += res;
}
if(!isnull(res = isrpmvuln(pkg:"krb5-workstation", rpm:"krb5-workstation~1.12.5~1.3.mga5", rls:"MAGEIA5"))) {
report += res;
}
if(!isnull(res = isrpmvuln(pkg:"lib64krb53", rpm:"lib64krb53~1.12.5~1.3.mga5", rls:"MAGEIA5"))) {
report += res;
}
if(!isnull(res = isrpmvuln(pkg:"lib64krb53-devel", rpm:"lib64krb53-devel~1.12.5~1.3.mga5", rls:"MAGEIA5"))) {
report += res;
}
if(!isnull(res = isrpmvuln(pkg:"libkrb53", rpm:"libkrb53~1.12.5~1.3.mga5", rls:"MAGEIA5"))) {
report += res;
}
if(!isnull(res = isrpmvuln(pkg:"libkrb53-devel", rpm:"libkrb53-devel~1.12.5~1.3.mga5", rls:"MAGEIA5"))) {
report += res;
}
if(report != "") {
security_message(data:report);
} else if(__pkg_match) {
exit(99);
}
exit(0);
}
if(release == "MAGEIA6") {
if(!isnull(res = isrpmvuln(pkg:"krb5", rpm:"krb5~1.15.1~2.2.mga6", rls:"MAGEIA6"))) {
report += res;
}
if(!isnull(res = isrpmvuln(pkg:"krb5-pkinit-openssl", rpm:"krb5-pkinit-openssl~1.15.1~2.2.mga6", rls:"MAGEIA6"))) {
report += res;
}
if(!isnull(res = isrpmvuln(pkg:"krb5-server", rpm:"krb5-server~1.15.1~2.2.mga6", rls:"MAGEIA6"))) {
report += res;
}
if(!isnull(res = isrpmvuln(pkg:"krb5-server-ldap", rpm:"krb5-server-ldap~1.15.1~2.2.mga6", rls:"MAGEIA6"))) {
report += res;
}
if(!isnull(res = isrpmvuln(pkg:"krb5-workstation", rpm:"krb5-workstation~1.15.1~2.2.mga6", rls:"MAGEIA6"))) {
report += res;
}
if(!isnull(res = isrpmvuln(pkg:"lib64krb53", rpm:"lib64krb53~1.15.1~2.2.mga6", rls:"MAGEIA6"))) {
report += res;
}
if(!isnull(res = isrpmvuln(pkg:"lib64krb53-devel", rpm:"lib64krb53-devel~1.15.1~2.2.mga6", rls:"MAGEIA6"))) {
report += res;
}
if(!isnull(res = isrpmvuln(pkg:"libkrb53", rpm:"libkrb53~1.15.1~2.2.mga6", rls:"MAGEIA6"))) {
report += res;
}
if(!isnull(res = isrpmvuln(pkg:"libkrb53-devel", rpm:"libkrb53-devel~1.15.1~2.2.mga6", rls:"MAGEIA6"))) {
report += res;
}
if(report != "") {
security_message(data:report);
} else if(__pkg_match) {
exit(99);
}
exit(0);
}
exit(0);
advisories.mageia.org/MGASA-2017-0420.html
bugs.mageia.org/show_bug.cgi?id=21628
lists.fedoraproject.org/archives/list/[email protected]/thread/2FPRUP4YVOEBGEROUYWZFEQ64HTMGNED/
lists.fedoraproject.org/archives/list/[email protected]/thread/2XIPFDWKYB3HQKSWLVJ6AAPFEG6BEPE3/
lists.opensuse.org/opensuse-updates/2017-11/msg00039.html
MGASA-2017-0420
7.5 High
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
9.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
8.2 High
AI Score
Confidence
High
0.021 Low
EPSS
Percentile
89.1%