Debian update for ghostscript
| Risk | High |
| Patch available | YES |
| Number of vulnerabilities | 2 |
| CVE-ID | CVE-2018-16509 CVE-2018-16802 |
| CWE-ID | CWE-78 CWE-121 |
| Exploitation vector | Network |
| Public exploit | Vulnerability #1 is being exploited in the wild. |
| Vulnerable software |
ghostscript (Debian package) Operating systems & Components / Operating system package or component |
| Vendor | Debian |
Security Bulletin
This security bulletin contains information about 2 vulnerabilities.
1) OS command injection
EUVDB-ID: #VU14690
Risk: High
CVSSv4.0: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Amber]
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 the affected package to version: 9.20~dfsg-3.2+deb9u5.
Vulnerable software versionsghostscript (Debian package): 9.20~dfsg-3.1 - 9.20~dfsg-3.2+deb9u4
CPE2.3- cpe:2.3:a:debian:ghostscript_debian_package:9.20~dfsg-3.1:*:*:*:*:debian_linux:*:*
- cpe:2.3:a:debian:ghostscript_debian_package:9.20~dfsg-3.2:*:*:*:*:debian_linux:*:*
- cpe:2.3:a:debian:ghostscript_debian_package:9.20~dfsg-3.2 deb9u1:*:*:*:*:debian_linux:*:*
https://www.debian.org/security/2018/dsa-4294
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.
2) Stack-based buffer overflow
EUVDB-ID: #VU16576
Risk: High
CVSSv4.0: 8.1 [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:U/U:Amber]
CVE-ID: CVE-2018-16802
CWE-ID:
CWE-121 - Stack-based buffer overflow
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to incorrect "restoration of privilege" checking when running out of stack during exception handling. A remote unauthenticated attacker can supply specially crafted PostScript, trigger memory corruption and execute code using the "pipe" instruction.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Note: the vulnerability exists due to an incomplete fix for CVE-2018-16509.
Update the affected package to version: 9.20~dfsg-3.2+deb9u5.
Vulnerable software versionsghostscript (Debian package): 9.20~dfsg-3.1 - 9.20~dfsg-3.2+deb9u4
CPE2.3- cpe:2.3:a:debian:ghostscript_debian_package:9.20~dfsg-3.1:*:*:*:*:debian_linux:*:*
- cpe:2.3:a:debian:ghostscript_debian_package:9.20~dfsg-3.2:*:*:*:*:debian_linux:*:*
- cpe:2.3:a:debian:ghostscript_debian_package:9.20~dfsg-3.2 deb9u1:*:*:*:*:debian_linux:*:*
https://www.debian.org/security/2018/dsa-4294
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.
