HTTP response splitting in memcached - CVE-2022-26635

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Main Vulnerability Database Vulnerabilities #VU71490

HTTP response splitting in memcached - CVE-2022-26635

Published: January 24, 2023


Vulnerability identifier: #VU71490
CSH Severity: Medium
CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2022-26635
CWE-ID: CWE-113
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to perform HTTP splitting attacks.

The vulnerability exists due improper NULL termination when processing CRLF character sequences. A remote attacker can send specially crafted request containing CRLF sequence and make the application to send a split HTTP response.

Successful exploitation of the vulnerability may allow an attacker perform cache poisoning attack.


Affected software

memcached
Amazon Linux AMI
php-pecl-memcached
php54-pecl-memcached
php56-pecl-memcached
php55-pecl-memcached
php70-pecl-memcached
php71-pecl-memcached

How to mitigate CVE-2022-26635

Install updates from vendor's website.

php-pecl-memcached - update to 2.1.0-3.6
php54-pecl-memcached - update to 2.1.0-3.10
php56-pecl-memcached - update to 2.2.0-5.17
php55-pecl-memcached - update to 2.2.0-5.17
php70-pecl-memcached - update to 3.2.0-1.3
php71-pecl-memcached - update to 3.2.0-1.4

External References

Related Security Bulletins