Ubuntu update for Memcached
| Risk | High |
| Patch available | YES |
| Number of vulnerabilities | 2 |
| CVE-ID | CVE-2017-9951 CVE-2018-1000115 |
| CWE-ID | CWE-126 CWE-406 |
| Exploitation vector | Network |
| Public exploit |
Public exploit code for vulnerability #1 is available. Public exploit code for vulnerability #2 is available. |
| Vulnerable software |
Ubuntu Operating systems & Components / Operating system |
| Vendor | Canonical Ltd. |
Security Bulletin
This security bulletin contains information about 2 vulnerabilities.
1) Buffer over-read
EUVDB-ID: #VU10898
Risk: High
CVSSv4.0: 8.7 [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:A/U:Amber]
CVE-ID: CVE-2017-9951
CWE-ID:
CWE-126 - Buffer over-read
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a boundary error in the try_read_command function in memcached.c in memcached before 1.4.39. A remote attacker can perform a denial of service (segmentation fault) via a request to add/set a key, which makes a comparison between signed and unsigned int and triggers a heap-based buffer over-read.
Mitigation
Update the affected packages
Ubuntu: 14.04 - 17.10
CPE2.3- cpe:2.3:o:canonical:ubuntu:14.04:*:*:*:*:*:*:*
- cpe:2.3:o:canonical:ubuntu:16.04:*:*:*:*:*:*:*
- cpe:2.3:o:canonical:ubuntu:17.10:*:*:*:*:*:*:*
https://www.ubuntu.com/usn/usn-3588-1/
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, a fully functional exploit for this vulnerability is available.
2) Network amplification
EUVDB-ID: #VU11194
Risk: Low
CVSSv4.0: 6.9 [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:A/U:Clear]
CVE-ID: CVE-2018-1000115
CWE-ID:
CWE-406 - Insufficient Control of Network Message Volume (Network Amplification)
Exploit availability: Yes
DescriptionThe vulnerability allows a remote unauthenticated attacker to conduct DDoS amplification attack against the target system.
The weakness exists due to insufficient control of network message volume. A remote attacker can scan for affected, insecure Memcached servers via UDP port 11211,spoof UDP packets, send a specially crafted request, trigger a response and conduct DDoS amplification attack.
Update the affected packages
Ubuntu: 14.04 - 17.10
CPE2.3https://www.ubuntu.com/usn/usn-3588-1/
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, a fully functional exploit for this vulnerability is available.
