openssh was updated to fix several security issues and bugs.
These security issues were fixed :
CVE-2015-5352: The x11_open_helper function in channels.c in ssh in OpenSSH when ForwardX11Trusted mode is not used, lacked a check of the refusal deadline for X connections, which made it easier for remote attackers to bypass intended access restrictions via a connection outside of the permitted time window (bsc#936695).
CVE-2015-5600: The kbdint_next_device function in auth2-chall.c in sshd in OpenSSH did not properly restrict the processing of keyboard-interactive devices within a single connection, which made it easier for remote attackers to conduct brute-force attacks or cause a denial of service (CPU consumption) via a long and duplicative list in the ssh -oKbdInteractiveDevices option, as demonstrated by a modified client that provides a different password for each pam element on this list (bsc#938746).
CVE-2015-4000: Removed and disabled weak DH groups to address LOGJAM (bsc#932483).
Hardening patch to fix sftp RCE (bsc#903649).
CVE-2015-6563: The monitor component in sshd in OpenSSH accepted extraneous username data in MONITOR_REQ_PAM_INIT_CTX requests, which allowed local users to conduct impersonation attacks by leveraging any SSH login access in conjunction with control of the sshd uid to send a crafted MONITOR_REQ_PWNAM request, related to monitor.c and monitor_wrap.c.
CVE-2015-6564: Use-after-free vulnerability in the mm_answer_pam_free_ctx function in monitor.c in sshd in OpenSSH might have allowed local users to gain privileges by leveraging control of the sshd uid to send an unexpectedly early MONITOR_REQ_PAM_FREE_CTX request.
The update package also includes non-security fixes. See advisory for details.
Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from SUSE update advisory SUSE-SU-2015:1547-1.
# The text itself is copyright (C) SUSE.
#
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(85929);
script_version("2.13");
script_set_attribute(attribute:"plugin_modification_date", value:"2022/12/05");
script_cve_id(
"CVE-2015-4000",
"CVE-2015-5352",
"CVE-2015-5600",
"CVE-2015-6563",
"CVE-2015-6564"
);
script_bugtraq_id(74733, 75525);
script_xref(name:"CEA-ID", value:"CEA-2021-0004");
script_name(english:"SUSE SLES11 Security Update : openssh (SUSE-SU-2015:1547-1) (Logjam)");
script_set_attribute(attribute:"synopsis", value:
"The remote SUSE host is missing one or more security updates.");
script_set_attribute(attribute:"description", value:
"openssh was updated to fix several security issues and bugs.
These security issues were fixed :
- CVE-2015-5352: The x11_open_helper function in
channels.c in ssh in OpenSSH when ForwardX11Trusted mode
is not used, lacked a check of the refusal deadline for
X connections, which made it easier for remote attackers
to bypass intended access restrictions via a connection
outside of the permitted time window (bsc#936695).
- CVE-2015-5600: The kbdint_next_device function in
auth2-chall.c in sshd in OpenSSH did not properly
restrict the processing of keyboard-interactive devices
within a single connection, which made it easier for
remote attackers to conduct brute-force attacks or cause
a denial of service (CPU consumption) via a long and
duplicative list in the ssh -oKbdInteractiveDevices
option, as demonstrated by a modified client that
provides a different password for each pam element on
this list (bsc#938746).
- CVE-2015-4000: Removed and disabled weak DH groups to
address LOGJAM (bsc#932483).
- Hardening patch to fix sftp RCE (bsc#903649).
- CVE-2015-6563: The monitor component in sshd in OpenSSH
accepted extraneous username data in
MONITOR_REQ_PAM_INIT_CTX requests, which allowed local
users to conduct impersonation attacks by leveraging any
SSH login access in conjunction with control of the sshd
uid to send a crafted MONITOR_REQ_PWNAM request, related
to monitor.c and monitor_wrap.c.
- CVE-2015-6564: Use-after-free vulnerability in the
mm_answer_pam_free_ctx function in monitor.c in sshd in
OpenSSH might have allowed local users to gain
privileges by leveraging control of the sshd uid to send
an unexpectedly early MONITOR_REQ_PAM_FREE_CTX request.
The update package also includes non-security fixes. See advisory for
details.
Note that Tenable Network Security has extracted the preceding
description block directly from the SUSE security advisory. Tenable
has attempted to automatically clean and format it as much as possible
without introducing additional issues.");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=673532");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=903649");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=905118");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=914309");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=916549");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=932483");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=936695");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=938746");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=943006");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=943010");
script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2015-4000/");
script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2015-5352/");
script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2015-5600/");
script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2015-6563/");
script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2015-6564/");
# https://www.suse.com/support/update/announcement/2015/suse-su-20151547-1.html
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?188f3ab8");
script_set_attribute(attribute:"solution", value:
"To install this SUSE Security Update use YaST online_update.
Alternatively you can run the command listed for your product :
SUSE Linux Enterprise Server for VMWare 11-SP3 :
zypper in -t patch slessp3-openssh-12087=1
SUSE Linux Enterprise Server 11-SP3 :
zypper in -t patch slessp3-openssh-12087=1
To bring your system up-to-date, use 'zypper patch'.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:C");
script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N");
script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
script_set_attribute(attribute:"exploit_available", value:"false");
script_set_attribute(attribute:"in_the_news", value:"true");
script_set_attribute(attribute:"vuln_publication_date", value:"2015/05/21");
script_set_attribute(attribute:"patch_publication_date", value:"2015/09/09");
script_set_attribute(attribute:"plugin_publication_date", value:"2015/09/14");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:openssh");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:openssh-askpass");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:openssh-askpass-gnome");
script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:suse_linux:11");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"SuSE Local Security Checks");
script_copyright(english:"This script is Copyright (C) 2015-2022 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("ssh_get_info.nasl");
script_require_keys("Host/local_checks_enabled", "Host/cpu", "Host/SuSE/release", "Host/SuSE/rpm-list");
exit(0);
}
include("audit.inc");
include("global_settings.inc");
include("rpm.inc");
if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item("Host/SuSE/release");
if (isnull(release) || release !~ "^(SLED|SLES)") audit(AUDIT_OS_NOT, "SUSE");
os_ver = pregmatch(pattern: "^(SLE(S|D)\d+)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "SUSE");
os_ver = os_ver[1];
if (! preg(pattern:"^(SLES11)$", string:os_ver)) audit(AUDIT_OS_NOT, "SUSE SLES11", "SUSE " + os_ver);
if (!get_kb_item("Host/SuSE/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);
cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if (cpu !~ "^i[3-6]86$" && "x86_64" >!< cpu && "s390x" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "SUSE " + os_ver, cpu);
sp = get_kb_item("Host/SuSE/patchlevel");
if (isnull(sp)) sp = "0";
if (os_ver == "SLES11" && (! preg(pattern:"^(3)$", string:sp))) audit(AUDIT_OS_NOT, "SLES11 SP3", os_ver + " SP" + sp);
flag = 0;
if (rpm_check(release:"SLES11", sp:"3", reference:"openssh-6.2p2-0.17.1")) flag++;
if (rpm_check(release:"SLES11", sp:"3", reference:"openssh-askpass-6.2p2-0.17.1")) flag++;
if (rpm_check(release:"SLES11", sp:"3", reference:"openssh-askpass-gnome-6.2p2-0.17.3")) flag++;
if (flag)
{
if (report_verbosity > 0) security_hole(port:0, extra:rpm_report_get());
else security_hole(0);
exit(0);
}
else
{
tested = pkg_tests_get();
if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
else audit(AUDIT_PACKAGE_NOT_INSTALLED, "openssh");
}
Vendor | Product | Version | CPE |
---|---|---|---|
novell | suse_linux | openssh | p-cpe:/a:novell:suse_linux:openssh |
novell | suse_linux | openssh-askpass | p-cpe:/a:novell:suse_linux:openssh-askpass |
novell | suse_linux | openssh-askpass-gnome | p-cpe:/a:novell:suse_linux:openssh-askpass-gnome |
novell | suse_linux | 11 | cpe:/o:novell:suse_linux:11 |
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-4000
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-5352
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-5600
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-6563
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-6564
www.nessus.org/u?188f3ab8
bugzilla.suse.com/show_bug.cgi?id=673532
bugzilla.suse.com/show_bug.cgi?id=903649
bugzilla.suse.com/show_bug.cgi?id=905118
bugzilla.suse.com/show_bug.cgi?id=914309
bugzilla.suse.com/show_bug.cgi?id=916549
bugzilla.suse.com/show_bug.cgi?id=932483
bugzilla.suse.com/show_bug.cgi?id=936695
bugzilla.suse.com/show_bug.cgi?id=938746
bugzilla.suse.com/show_bug.cgi?id=943006
bugzilla.suse.com/show_bug.cgi?id=943010
www.suse.com/security/cve/CVE-2015-4000/
www.suse.com/security/cve/CVE-2015-5352/
www.suse.com/security/cve/CVE-2015-5600/
www.suse.com/security/cve/CVE-2015-6563/
www.suse.com/security/cve/CVE-2015-6564/