Multiple vulnerabilities in IBM Dynamic System Analysis (DSA) Preboot
| Risk | High |
| Patch available | YES |
| Number of vulnerabilities | 5 |
| CVE-ID | CVE-2018-1126 CVE-2018-1125 CVE-2018-1124 CVE-2018-1123 CVE-2018-1122 |
| CWE-ID | CWE-120 CWE-121 CWE-190 CWE-264 |
| Exploitation vector | Network |
| Public exploit |
Public exploit code for vulnerability #1 is available. Public exploit code for vulnerability #2 is available. Public exploit code for vulnerability #3 is available. Public exploit code for vulnerability #4 is available. Public exploit code for vulnerability #5 is available. |
| Vulnerable software |
Dynamic System Analysis (DSA) Preboot Other software / Other software solutions |
| Vendor | IBM Corporation |
Security Bulletin
This security bulletin contains information about 5 vulnerabilities.
1) Buffer overflow
EUVDB-ID: #VU12992
Risk: High
CVSSv4.0: 8.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Amber]
CVE-ID: CVE-2018-1126
CWE-ID:
CWE-120 - Buffer overflow
Exploit availability: Yes
DescriptionThe vulnerability allows a remote attacker to execute arbitrary code on the target system.
Mitigation
Install update from vendor's website.
Vulnerable software versionsDynamic System Analysis (DSA) Preboot: before dsyte2z-9.65
CPE2.3 External linkshttps://www.ibm.com/support/pages/node/874468
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.
2) Stack-based buffer overflow
EUVDB-ID: #VU12993
Risk: High
CVSSv4.0: 8.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Amber]
CVE-ID: CVE-2018-1125
CWE-ID:
CWE-121 - Stack-based buffer overflow
Exploit availability: Yes
DescriptionThe vulnerability allows a remote attacker to execute arbitrary code on the target system.
Mitigation
Install update from vendor's website.
Vulnerable software versionsDynamic System Analysis (DSA) Preboot: before dsyte2z-9.65
CPE2.3 External linkshttps://www.ibm.com/support/pages/node/874468
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.
3) Integer overflow
EUVDB-ID: #VU12977
Risk: Low
CVSSv4.0: 7.1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Clear]
CVE-ID: CVE-2018-1124
CWE-ID:
CWE-190 - Integer overflow
Exploit availability: Yes
DescriptionThe vulnerability allows a local attacker to gain elevated privileges on the target system.
The weakness exists due to integer overflow in libprocps's file2strvec() function. A local attacker can execute a vulnerable utility (pgrep, pidof, pkill, and w are vulnerable by default; other utilities are vulnerable if executed with non-default options) and gain elevated privileges.
Install update from vendor's website.
Vulnerable software versionsDynamic System Analysis (DSA) Preboot: before dsyte2z-9.65
CPE2.3 External linkshttps://www.ibm.com/support/pages/node/874468
Q & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.
4) Buffer overflow
EUVDB-ID: #VU12976
Risk: Low
CVSSv4.0: 5.5 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/U:Clear]
CVE-ID: CVE-2018-1123
CWE-ID:
CWE-120 - Buffer overflow
Exploit availability: Yes
DescriptionThe vulnerability allows a remote attacker to cause DoS condition on the target system.
The weakness exists due to ps mmap()s its output buffer and mprotect()s its last page with PROT_NONE (an effective guard page). A remote attacker can trick the victim into opening a specially crafted input, overflow the output buffer of ps and cause the service to crash.
Install update from vendor's website.
Vulnerable software versionsDynamic System Analysis (DSA) Preboot: before dsyte2z-9.65
CPE2.3 External linkshttps://www.ibm.com/support/pages/node/874468
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.
5) Privilege escalation
EUVDB-ID: #VU12975
Risk: Low
CVSSv4.0: 7.1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Clear]
CVE-ID: CVE-2018-1122
CWE-ID:
CWE-264 - Permissions, Privileges, and Access Controls
Exploit availability: Yes
DescriptionThe vulnerability allows a local attacker to gain elevated privileges on the target system.
The weakness exists due to top reads its configuration file from the current working directory, without any security check, if the HOME environment variable is unset or empty. A local attacker can exploit one of several vulnerabilities in top's config_file() function, execute top in /tmp (for example) and gain elevated privileges.
Install update from vendor's website.
Vulnerable software versionsDynamic System Analysis (DSA) Preboot: before dsyte2z-9.65
CPE2.3 External linkshttps://www.ibm.com/support/pages/node/874468
Q & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.
