Denial of service in memcached

1) Input validation error

EUVDB-ID: #VU26354

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-10931

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input when parsing a binary protocol header within the try_read_command_binary() function in memcached.c. A remote attacker can pass specially crafted request to the memcached server and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

memcached: 1.6.0 - 1.6.1

External links

http://github.com/memcached/memcached/commit/02c6a2b62ddcb6fa4569a591d3461a156a636305
http://github.com/memcached/memcached/issues/629
http://github.com/memcached/memcached/wiki/ReleaseNotes162

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.