Multiple vulnerabilities in Memcached

Published: 2023-11-13

Risk	High
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2023-46852 CVE-2023-46853
CWE-ID	CWE-119 CWE-193
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	memcached Server applications / Web servers
Vendor	Memcached

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Buffer overflow

EUVDB-ID: #VU83025

Risk: High

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-46852

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error within the proxy_run_coroutine() function in proto_proxy.c when processing multiget requests with multiple spaces in proxy mode. A remote attacker can send a specially crafted HTTP request to trigger memory corruption and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

memcached: 1.0.0 - 1.6.21

External links

http://github.com/memcached/memcached/commit/76a6c363c18cfe7b6a1524ae64202ac9db330767
http://github.com/memcached/memcached/compare/1.6.21...1.6.22

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.

2) Off-by-one

EUVDB-ID: #VU83024