CVE-2022-30556: Information Disclosure in mod_lua with websockets
First published: Wed Jun 08 2022(Updated: )
Apache HTTP Server could allow a remote attacker to obtain sensitive information, caused by an error in mod_lua with websockets. An attacker could exploit this vulnerability to return lengths to applications calling r:wsread() that point past the end of the storage allocated for the buffer.
Credit: security@apache.org security@apache.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/httpd | <2.4.54 | 2.4.54 |
| redhat/httpd | <0:2.4.53-7.el9 | 0:2.4.53-7.el9 |
| redhat/httpd24-httpd | <0:2.4.34-23.el7.5 | 0:2.4.34-23.el7.5 |
| Apache HTTP server | <=2.4.53 | |
| NetApp Clustered Data ONTAP | ||
| Fedoraproject Fedora | =35 | |
| Fedoraproject Fedora | =36 |
Remedy
Disabling mod_lua and restarting httpd will mitigate this flaw.
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Reference Links
- https://www.cve.org/CVERecord?id=CVE-2022-30556 https://nvd.nist.gov/vuln/detail/CVE-2022-30556 https://httpd.apache.org/security/vulnerabilities_24.html#CVE-2022-30556
- https://bugzilla.redhat.com/show_bug.cgi?id=2095018
- https://access.redhat.com/errata/RHSA-2022:7647
- https://access.redhat.com/errata/RHSA-2022:8067
- https://access.redhat.com/errata/RHSA-2022:6753
- https://access.redhat.com/security/cve/cve-2022-30556
- https://exchange.xforce.ibmcloud.com/vulnerabilities/228336
- https://www.ibm.com/support/pages/node/6952319 (Advisory)
- http://www.openwall.com/lists/oss-security/2022/06/08/7
- https://httpd.apache.org/security/vulnerabilities_24.html
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/7QUGG2QZWHTITMABFLVXA4DNYUOTPWYQ/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/YPY2BLEVJWFH34AX77ZJPLD2OOBYR6ND/
- https://security.gentoo.org/glsa/202208-20
- https://security.netapp.com/advisory/ntap-20220624-0005/
- https://www.openwall.com/lists/oss-security/2022/06/08/7
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2095019
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YPY2BLEVJWFH34AX77ZJPLD2OOBYR6ND/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7QUGG2QZWHTITMABFLVXA4DNYUOTPWYQ/
Parent vulnerabilities
(Appears in the following advisories)
Frequently Asked Questions
What is CVE-2022-30556?
CVE-2022-30556 is a vulnerability in Apache HTTP Server that allows a remote attacker to obtain sensitive information.
How does CVE-2022-30556 affect Apache HTTP Server?
CVE-2022-30556 affects Apache HTTP Server by causing an error in mod_lua with websockets, allowing an attacker to return lengths to applications that point past the end of the allocated storage for the buffer.
What is the severity of CVE-2022-30556?
The severity of CVE-2022-30556 is high with a severity score of 7.5.
Which versions of Apache HTTP Server are affected by CVE-2022-30556?
Apache HTTP Server versions 2.4.53 and earlier are affected by CVE-2022-30556.
How can I mitigate CVE-2022-30556?
To mitigate CVE-2022-30556, it is recommended to update Apache HTTP Server to version 2.4.54.
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