The remote Redhat Enterprise Linux 6 host has one or more packages installed that are affected by multiple vulnerabilities that have been acknowledged by the vendor but will not be patched.
ncurses: Stack-based buffer overflow caused by format string vulnerability in fmt_entry function (CVE-2017-10685)
In ncurses 6.0, there is an attempted 0xffffffffffffffff access in the append_acs function of tinfo/parse_entry.c. It could lead to a remote denial of service attack if the terminfo library code is used to process untrusted terminfo data. (CVE-2017-11112)
In ncurses 6.0, there is a NULL Pointer Dereference in the _nc_parse_entry function of tinfo/parse_entry.c. It could lead to a remote denial of service attack if the terminfo library code is used to process untrusted terminfo data. (CVE-2017-11113)
There is an infinite loop in the next_char function in comp_scan.c in ncurses 6.0, related to libtic. A crafted input will lead to a remote denial of service attack. (CVE-2017-13728)
There is an illegal address access in the _nc_save_str function in alloc_entry.c in ncurses 6.0. It will lead to a remote denial of service attack. (CVE-2017-13729)
There is an illegal address access in the function _nc_read_entry_source() in progs/tic.c in ncurses 6.0 that might lead to a remote denial of service attack. (CVE-2017-13730)
There is an illegal address access in the function postprocess_termcap() in parse_entry.c in ncurses 6.0 that will lead to a remote denial of service attack. (CVE-2017-13731)
There is an illegal address access in the function dump_uses() in progs/dump_entry.c in ncurses 6.0 that might lead to a remote denial of service attack. (CVE-2017-13732)
There is an illegal address access in the fmt_entry function in progs/dump_entry.c in ncurses 6.0 that might lead to a remote denial of service attack. (CVE-2017-13733)
There is an illegal address access in the _nc_safe_strcat function in strings.c in ncurses 6.0 that will lead to a remote denial of service attack. (CVE-2017-13734)
Stack-based buffer overflow in the _nc_write_entry function in tinfo/write_entry.c in ncurses 6.0 allows attackers to cause a denial of service (application crash) or possibly execute arbitrary code via a crafted terminfo file, as demonstrated by tic. (CVE-2017-16879)
Rejected reason: DO NOT USE THIS CANDIDATE NUMBER. ConsultIDs: none. Reason: This candidate was withdrawn by its CNA. Further investigation showed that it was not a security issue. Notes: none (CVE-2018-10754)
In ncurses 6.1, there is a NULL pointer dereference at function _nc_parse_entry in parse_entry.c that will lead to a denial of service attack. The product proceeds to the dereference code path even after a dubious character `*’ in name or alias field detection. (CVE-2018-19211)
In ncurses, possibly a 6.x version, there is a NULL pointer dereference at the function _nc_name_match that will lead to a denial of service attack. NOTE: the original report stated version 6.1, but the issue did not reproduce for that version according to the maintainer or a reliable third-party (CVE-2018-19217)
There is a heap-based buffer over-read in the _nc_find_entry function in tinfo/comp_hash.c in the terminfo library in ncurses before 6.1-20191012. (CVE-2019-17594)
There is a heap-based buffer over-read in the fmt_entry function in tinfo/comp_hash.c in the terminfo library in ncurses before 6.1-20191012. (CVE-2019-17595)
Buffer Overflow vulnerability in one_one_mapping function in progs/dump_entry.c:1373 in ncurses 6.1 allows remote attackers to cause a denial of service via crafted command. (CVE-2020-19185)
Buffer Overflow vulnerability in _nc_find_entry function in tinfo/comp_hash.c:66 in ncurses 6.1 allows remote attackers to cause a denial of service via crafted command. (CVE-2020-19186)
Buffer Overflow vulnerability in fmt_entry function in progs/dump_entry.c:1100 in ncurses 6.1 allows remote attackers to cause a denial of service via crafted command. (CVE-2020-19187)
Buffer Overflow vulnerability in fmt_entry function in progs/dump_entry.c:1116 in ncurses 6.1 allows remote attackers to cause a denial of service via crafted command. (CVE-2020-19188)
Buffer Overflow vulnerability in postprocess_terminfo function in tinfo/parse_entry.c:997 in ncurses 6.1 allows remote attackers to cause a denial of service via crafted command. (CVE-2020-19189)
Buffer Overflow vulnerability in _nc_find_entry in tinfo/comp_hash.c:70 in ncurses 6.1 allows remote attackers to cause a denial of service via crafted command. (CVE-2020-19190)
An issue was discovered in ncurses through v6.2-1. _nc_captoinfo in captoinfo.c has a heap-based buffer overflow. (CVE-2021-39537)
ncurses before 6.4 20230408, when used by a setuid application, allows local users to trigger security- relevant memory corruption via malformed data in a terminfo database file that is found in $HOME/.terminfo or reached via the TERMINFO or TERM environment variable. (CVE-2023-29491)
NCurse v6.4-20230418 was discovered to contain a segmentation fault via the component _nc_wrap_entry().
(CVE-2023-50495)
Note that Nessus has not tested for these issues but has instead relied on the package manager’s report that the package is installed.
#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Red Hat Security Advisory ncurses. The text
# itself is copyright (C) Red Hat, Inc.
##
include('compat.inc');
if (description)
{
script_id(196707);
script_version("1.0");
script_set_attribute(attribute:"plugin_modification_date", value:"2024/05/11");
script_cve_id(
"CVE-2017-10685",
"CVE-2017-11112",
"CVE-2017-11113",
"CVE-2017-13728",
"CVE-2017-13729",
"CVE-2017-13730",
"CVE-2017-13731",
"CVE-2017-13732",
"CVE-2017-13733",
"CVE-2017-13734",
"CVE-2017-16879",
"CVE-2018-10754",
"CVE-2018-19211",
"CVE-2018-19217",
"CVE-2019-17594",
"CVE-2019-17595",
"CVE-2020-19185",
"CVE-2020-19186",
"CVE-2020-19187",
"CVE-2020-19188",
"CVE-2020-19189",
"CVE-2020-19190",
"CVE-2021-39537",
"CVE-2023-29491",
"CVE-2023-50495"
);
script_name(english:"RHEL 6 : ncurses (Unpatched Vulnerability)");
script_set_attribute(attribute:"synopsis", value:
"The remote Red Hat 6 host is affected by multiple vulnerabilities that will not be patched.");
script_set_attribute(attribute:"description", value:
"The remote Redhat Enterprise Linux 6 host has one or more packages installed that are affected by multiple
vulnerabilities that have been acknowledged by the vendor but will not be patched.
- ncurses: Stack-based buffer overflow caused by format string vulnerability in fmt_entry function
(CVE-2017-10685)
- In ncurses 6.0, there is an attempted 0xffffffffffffffff access in the append_acs function of
tinfo/parse_entry.c. It could lead to a remote denial of service attack if the terminfo library code is
used to process untrusted terminfo data. (CVE-2017-11112)
- In ncurses 6.0, there is a NULL Pointer Dereference in the _nc_parse_entry function of
tinfo/parse_entry.c. It could lead to a remote denial of service attack if the terminfo library code is
used to process untrusted terminfo data. (CVE-2017-11113)
- There is an infinite loop in the next_char function in comp_scan.c in ncurses 6.0, related to libtic. A
crafted input will lead to a remote denial of service attack. (CVE-2017-13728)
- There is an illegal address access in the _nc_save_str function in alloc_entry.c in ncurses 6.0. It will
lead to a remote denial of service attack. (CVE-2017-13729)
- There is an illegal address access in the function _nc_read_entry_source() in progs/tic.c in ncurses 6.0
that might lead to a remote denial of service attack. (CVE-2017-13730)
- There is an illegal address access in the function postprocess_termcap() in parse_entry.c in ncurses 6.0
that will lead to a remote denial of service attack. (CVE-2017-13731)
- There is an illegal address access in the function dump_uses() in progs/dump_entry.c in ncurses 6.0 that
might lead to a remote denial of service attack. (CVE-2017-13732)
- There is an illegal address access in the fmt_entry function in progs/dump_entry.c in ncurses 6.0 that
might lead to a remote denial of service attack. (CVE-2017-13733)
- There is an illegal address access in the _nc_safe_strcat function in strings.c in ncurses 6.0 that will
lead to a remote denial of service attack. (CVE-2017-13734)
- Stack-based buffer overflow in the _nc_write_entry function in tinfo/write_entry.c in ncurses 6.0 allows
attackers to cause a denial of service (application crash) or possibly execute arbitrary code via a
crafted terminfo file, as demonstrated by tic. (CVE-2017-16879)
- Rejected reason: DO NOT USE THIS CANDIDATE NUMBER. ConsultIDs: none. Reason: This candidate was withdrawn
by its CNA. Further investigation showed that it was not a security issue. Notes: none (CVE-2018-10754)
- In ncurses 6.1, there is a NULL pointer dereference at function _nc_parse_entry in parse_entry.c that will
lead to a denial of service attack. The product proceeds to the dereference code path even after a
dubious character `*' in name or alias field detection. (CVE-2018-19211)
- In ncurses, possibly a 6.x version, there is a NULL pointer dereference at the function _nc_name_match
that will lead to a denial of service attack. NOTE: the original report stated version 6.1, but the issue
did not reproduce for that version according to the maintainer or a reliable third-party (CVE-2018-19217)
- There is a heap-based buffer over-read in the _nc_find_entry function in tinfo/comp_hash.c in the terminfo
library in ncurses before 6.1-20191012. (CVE-2019-17594)
- There is a heap-based buffer over-read in the fmt_entry function in tinfo/comp_hash.c in the terminfo
library in ncurses before 6.1-20191012. (CVE-2019-17595)
- Buffer Overflow vulnerability in one_one_mapping function in progs/dump_entry.c:1373 in ncurses 6.1 allows
remote attackers to cause a denial of service via crafted command. (CVE-2020-19185)
- Buffer Overflow vulnerability in _nc_find_entry function in tinfo/comp_hash.c:66 in ncurses 6.1 allows
remote attackers to cause a denial of service via crafted command. (CVE-2020-19186)
- Buffer Overflow vulnerability in fmt_entry function in progs/dump_entry.c:1100 in ncurses 6.1 allows
remote attackers to cause a denial of service via crafted command. (CVE-2020-19187)
- Buffer Overflow vulnerability in fmt_entry function in progs/dump_entry.c:1116 in ncurses 6.1 allows
remote attackers to cause a denial of service via crafted command. (CVE-2020-19188)
- Buffer Overflow vulnerability in postprocess_terminfo function in tinfo/parse_entry.c:997 in ncurses 6.1
allows remote attackers to cause a denial of service via crafted command. (CVE-2020-19189)
- Buffer Overflow vulnerability in _nc_find_entry in tinfo/comp_hash.c:70 in ncurses 6.1 allows remote
attackers to cause a denial of service via crafted command. (CVE-2020-19190)
- An issue was discovered in ncurses through v6.2-1. _nc_captoinfo in captoinfo.c has a heap-based buffer
overflow. (CVE-2021-39537)
- ncurses before 6.4 20230408, when used by a setuid application, allows local users to trigger security-
relevant memory corruption via malformed data in a terminfo database file that is found in $HOME/.terminfo
or reached via the TERMINFO or TERM environment variable. (CVE-2023-29491)
- NCurse v6.4-20230418 was discovered to contain a segmentation fault via the component _nc_wrap_entry().
(CVE-2023-50495)
Note that Nessus has not tested for these issues but has instead relied on the package manager's report that the package
is installed.");
script_set_attribute(attribute:"solution", value:
"The vendor has acknowledged the vulnerabilities but no solution has been provided. Refer to the vendor for remediation
guidance.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2017-10685");
script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
script_set_attribute(attribute:"exploit_available", value:"true");
script_set_attribute(attribute:"vendor_unpatched", value:"true");
script_set_attribute(attribute:"vuln_publication_date", value:"2017/06/29");
script_set_attribute(attribute:"plugin_publication_date", value:"2024/05/11");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:5");
script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:6");
script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:7");
script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:8");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:ncurses");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Red Hat Local Security Checks");
script_copyright(english:"This script is Copyright (C) 2024 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("ssh_get_info.nasl", "redhat_repos.nasl");
script_require_keys("Host/local_checks_enabled", "Host/RedHat/release", "Host/RedHat/rpm-list", "Host/cpu");
exit(0);
}
include('rpm.inc');
include('rhel.inc');
if (!get_kb_item("global_settings/vendor_unpatched"))
exit(0, "Unpatched Vulnerabilities Detection not active.");
if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_release = get_kb_item('Host/RedHat/release');
if (isnull(os_release) || 'Red Hat' >!< os_release) audit(AUDIT_OS_NOT, 'Red Hat');
var os_ver = pregmatch(pattern: "Red Hat Enterprise Linux.*release ([0-9]+(\.[0-9]+)?)", string:os_release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'Red Hat');
os_ver = os_ver[1];
if (!rhel_check_release(operator: 'ge', os_version: os_ver, rhel_version: '6')) audit(AUDIT_OS_NOT, 'Red Hat 6.x', 'Red Hat ' + os_ver);
if (!get_kb_item('Host/RedHat/rpm-list')) audit(AUDIT_PACKAGE_LIST_MISSING);
var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 's390' >!< cpu && 'aarch64' >!< cpu && 'ppc' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Red Hat', cpu);
var constraints = [
{
'pkgs': [
{'reference':'ncurses', 'release':'6', 'rpm_spec_vers_cmp':TRUE, 'unpatched_pkg':'ncurses'}
]
}
];
var flag = 0;
foreach var constraint_array ( constraints ) {
var repo_relative_urls = NULL;
var enterprise_linux_flag = rhel_repo_urls_has_content_dist_rhel(repo_urls:repo_relative_urls);
foreach var pkg ( constraint_array['pkgs'] ) {
var unpatched_pkg = NULL;
var _release = NULL;
var sp = NULL;
var el_string = NULL;
var rpm_spec_vers_cmp = NULL;
var exists_check = NULL;
var cves = NULL;
if (!empty_or_null(pkg['unpatched_pkg'])) unpatched_pkg = pkg['unpatched_pkg'];
if (!empty_or_null(pkg['release'])) _release = 'RHEL' + pkg['release'];
if (!empty_or_null(pkg['sp'])) sp = pkg['sp'];
if (!empty_or_null(pkg['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = pkg['rpm_spec_vers_cmp'];
if (!empty_or_null(pkg['exists_check'])) exists_check = pkg['exists_check'];
if (!empty_or_null(pkg['cves'])) cves = pkg['cves'];
if (unpatched_pkg &&
_release &&
(!exists_check || rpm_exists(release:_release, rpm:exists_check)) &&
unpatched_package_exists(release:_release, package:unpatched_pkg, cves: cves)) flag++;
}
}
if (flag)
{
var extra = NULL;
security_report_v4(
port : 0,
severity : SECURITY_HOLE,
extra : unpatched_packages_report()
);
exit(0);
}
else
{
var tested = pkg_tests_get();
if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'ncurses');
}
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-10685
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-11112
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-11113
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-13728
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-13729
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-13730
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-13731
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-13732
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-13733
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-13734
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-16879
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-10754
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-19211
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-19217
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-17594
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-17595
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-19185
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-19186
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-19187
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-19188
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-19189
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-19190
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-39537
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-29491
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-50495