Ubuntu update for PHP
| Risk | Low |
| Patch available | YES |
| Number of vulnerabilities | 3 |
| CVE-ID | CVE-2018-5712 CVE-2017-12933 CVE-2017-16642 |
| CWE-ID | CWE-79 CWE-502 CWE-125 |
| Exploitation vector | Network |
| Public exploit | Public exploit code for vulnerability #3 is available. |
| Vulnerable software |
php5 (Ubuntu package) Operating systems & Components / Operating system package or component |
| Vendor | Canonical Ltd. |
Security Bulletin
This security bulletin contains information about 3 vulnerabilities.
1) Reflected cross-site scripting
EUVDB-ID: #VU10389
Risk: Low
CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Clear]
CVE-ID: CVE-2018-5712
CWE-ID:
CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Exploit availability: No
DescriptionThe disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.
The vulnerability exists on the PHAR 404 error page due to insufficient sanitization of user-supplied data. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.
Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.
Update the affected packages
php5 (Ubuntu package): 5.5.9+dfsg-1ubuntu4.6 - 5.5.9+dfsg-1ubuntu4.22
CPE2.3- cpe:2.3:o:canonical:php5_ubuntu_package:5.5.9 dfsg-1ubuntu4.6:*:*:*:*:ubuntu:*:*
- cpe:2.3:o:canonical:php5_ubuntu_package:5.5.9 dfsg-1ubuntu4.7:*:*:*:*:ubuntu:*:*
- cpe:2.3:o:canonical:php5_ubuntu_package:5.5.9 dfsg-1ubuntu4.8:*:*:*:*:ubuntu:*:*
https://www.ubuntu.com/usn/usn-3566-1/
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) Deserialization of untrusted data
EUVDB-ID: #VU9956
Risk: Low
CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]
CVE-ID: CVE-2017-12933
CWE-ID:
CWE-502 - Deserialization of Untrusted Data
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a buffer over-read while unserializing untrusted data in the finish_nested_data function in ext/standard/var_unserializer.re. A remote attacker can perform a denial of service attack.
Mitigation
Update the affected packages
php5 (Ubuntu package): 5.5.9+dfsg-1ubuntu4.6 - 5.5.9+dfsg-1ubuntu4.22
CPE2.3- cpe:2.3:o:canonical:php5_ubuntu_package:5.5.9 dfsg-1ubuntu4.6:*:*:*:*:ubuntu:*:*
- cpe:2.3:o:canonical:php5_ubuntu_package:5.5.9 dfsg-1ubuntu4.7:*:*:*:*:ubuntu:*:*
- cpe:2.3:o:canonical:php5_ubuntu_package:5.5.9 dfsg-1ubuntu4.8:*:*:*:*:ubuntu:*:*
https://www.ubuntu.com/usn/usn-3566-1/
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.
3) Out-of-bounds read
EUVDB-ID: #VU8968
Risk: Low
CVSSv4.0: 7.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/U:Clear]
CVE-ID: CVE-2017-16642
CWE-ID:
CWE-125 - Out-of-bounds read
Exploit availability: Yes
DescriptionThe vulnerability allows a remote attacker to cause DoS condition on the target system.
The weakness exists due to out-of-bounds read in timelib_meridian(). A remote attacker can cause the application to crash.
Update the affected packages
php5 (Ubuntu package): 5.5.9+dfsg-1ubuntu4.6 - 5.5.9+dfsg-1ubuntu4.22
CPE2.3- cpe:2.3:o:canonical:php5_ubuntu_package:5.5.9 dfsg-1ubuntu4.6:*:*:*:*:ubuntu:*:*
- cpe:2.3:o:canonical:php5_ubuntu_package:5.5.9 dfsg-1ubuntu4.7:*:*:*:*:ubuntu:*:*
- cpe:2.3:o:canonical:php5_ubuntu_package:5.5.9 dfsg-1ubuntu4.8:*:*:*:*:ubuntu:*:*
https://www.ubuntu.com/usn/usn-3566-1/
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.
