Multiple vulnerabilities in Artifex Ghostscript
| Risk | High |
| Patch available | YES |
| Number of vulnerabilities | 4 |
| CVE-ID | CVE-2018-16510 CVE-2018-16511 CVE-2018-16513 CVE-2018-16509 |
| CWE-ID | CWE-20 CWE-843 CWE-78 |
| Exploitation vector | Network |
| Public exploit |
Public exploit code for vulnerability #2 is available. Public exploit code for vulnerability #3 is available. Vulnerability #4 is being exploited in the wild. |
| Vulnerable software Subscribe |
Ghostscript Universal components / Libraries / Libraries used by multiple products |
| Vendor | Artifex Software, Inc. |
Security Bulletin
This security bulletin contains information about 4 vulnerabilities.
1) Improper input validation
EUVDB-ID: #VU14687
Risk: High
CVSSv3.1: 8.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2018-16510
CWE-ID:
CWE-20 - Improper input validation
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to cause DoS condition or execute arbitrary code on the target system.
The vulnerability exists due to incorrect exec stack handling in the CS and SC PDF operators. A remote unauthenticated attacker can trick the victim into opening a specially crafted PDF file that submits malicious input and cause the affected software to crash or execute arbitrary code with elevated privileges.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
MitigationUpdate to version 9.24.
Vulnerable software versionsGhostscript: 9.00 - 9.23
External linkshttp://git.ghostscript.com/?p=ghostpdl.git;a=commit;h=ea735ba37dc0fd5f5622d031830b9a559dec1cc9
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.
2) Type confusion
EUVDB-ID: #VU14688
Risk: High
CVSSv3.1: 8.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C]
CVE-ID: CVE-2018-16511
CWE-ID:
CWE-843 - Type confusion
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to cause DoS condition or execute arbitrary code on the target system.
The vulnerability exists due to a type confusion condition in the ztype code. A remote unauthenticated attacker can trick the victim into opening a specially crafted PostScript file that submits malicious input and cause the affected software to crash or execute arbitrary code with elevated privileges.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
MitigationUpdate to version 9.24.
Vulnerable software versionsGhostscript: 9.00 - 9.23
External linkshttp://git.ghostscript.com/?p=ghostpdl.git;a=commit;h=0edd3d6c634a577db261615a9dc2719bca7f6e01
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) Type confusion
EUVDB-ID: #VU14689
Risk: High
CVSSv3.1: 8.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C]
CVE-ID: CVE-2018-16513
CWE-ID:
CWE-843 - Type confusion
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to cause DoS condition or execute arbitrary code on the target system.
The vulnerability exists due to a type confusion condition in the setcolor function. A remote unauthenticated attacker can trick the victim into opening a specially crafted PostScript file that submits malicious input and cause the affected software to crash or execute arbitrary code with elevated privileges.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
MitigationUpdate to version 9.24.
Vulnerable software versionsGhostscript: 9.00 - 9.23
External linkshttp://git.ghostscript.com/?p=ghostpdl.git;a=commit;h=b326a71659b7837d3acde954b18bda1a6f5e9498
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.
4) OS command injection
EUVDB-ID: #VU14690
Risk: High
CVSSv3.1: 9.2 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H/E:H/RL:O/RC:C]
CVE-ID: CVE-2018-16509
CWE-ID:
CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Exploit availability: Yes
DescriptionThe vulnerability allows a remote attacker to execute arbitrary shell commands on the target system.
The vulnerability exists due to /invalidaccess checks can be bypassed after a restore failure. A remote unauthenticated attacker can trick the victim into opening a specially crafted PostScript file that submits malicious input and execute arbitrary shell commands.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Note: original fix for this vulnerability was incomplete in version 9.24. Vendor has issued another patch.
Update to version 9.25.
Vulnerable software versionsGhostscript: 9.00 - 9.24
External linkshttp://git.ghostscript.com/?p=ghostpdl.git;a=commitdiff;h=520bb0ea7519aa3e79db78aaf0589dae02103764
http://seclists.org/oss-sec/2018/q3/228
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?
Yes. This vulnerability is being exploited in the wild.
