CVE-2023-4813: Glibc: potential use-after-free in gaih_inet()
First published: Tue Mar 01 2022(Updated: )
A flaw was found in glibc. In an uncommon situation, the gaih_inet function may use memory that has been freed, resulting in an application crash. This issue is only exploitable when the getaddrinfo function is called and the hosts database in /etc/nsswitch.conf is configured with SUCCESS=continue or SUCCESS=merge.
Credit: secalert@redhat.com secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/glibc | <0:2.28-225.el8_8.6 | 0:2.28-225.el8_8.6 |
| redhat/glibc | <0:2.34-60.el9_2.7 | 0:2.34-60.el9_2.7 |
| GNU glibc | <2.36 | |
| Redhat Enterprise Linux | =8.0 | |
| Redhat Enterprise Linux | =9.0 | |
| Redhat Enterprise Linux Eus | =8.8 | |
| Redhat Enterprise Linux Eus | =9.2 | |
| Redhat Enterprise Linux For Ibm Z Systems Eus S390x | =9.2 | |
| Redhat Enterprise Linux For Ibm Z Systems S390x | =9.2 | |
| Redhat Enterprise Linux For Power Little Endian | =9.2_ppc64le | |
| Redhat Enterprise Linux For Power Little Endian Eus | =9.2_ppc64le | |
| Redhat Enterprise Linux Server Aus | =9.2 | |
| Redhat Enterprise Linux Server Tus | =8.8 | |
| Fedoraproject Fedora | =38 | |
| redhat/glibc | <2.36 | 2.36 |
| ubuntu/glibc | <2.27-3ubuntu1.6+ | 2.27-3ubuntu1.6+ |
| ubuntu/glibc | <2.31-0ubuntu9.14 | 2.31-0ubuntu9.14 |
| ubuntu/glibc | <2.35-0ubuntu3.5 | 2.35-0ubuntu3.5 |
| ubuntu/glibc | <2.36-3 | 2.36-3 |
| ubuntu/glibc | <2.23-0ubuntu11.3+ | 2.23-0ubuntu11.3+ |
| debian/glibc | <=2.28-10+deb10u1<=2.28-10+deb10u2<=2.31-13+deb11u8<=2.31-13+deb11u9 | 2.36-9+deb12u4 2.36-9+deb12u6 2.37-18 |
| Netapp Active Iq Unified Manager Vmware Vsphere | ||
| All of | ||
| Netapp H300s Firmware | ||
| Netapp H300s | ||
| All of | ||
| Netapp H500s Firmware | ||
| Netapp H500s | ||
| All of | ||
| Netapp H700s Firmware | ||
| Netapp H700s | ||
| All of | ||
| Netapp H410s Firmware | ||
| Netapp H410s | ||
| All of | ||
| Netapp H410c Firmware | ||
| Netapp H410c |
Remedy
Removing the "SUCCESS=continue" or "SUCCESS=merge" configuration from the hosts database in /etc/nsswitch.conf will mitigate this vulnerability. Note that, these options are not supported by the hosts database, if they were working before it was because of this bug.
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Reference Links
- https://www.cve.org/CVERecord?id=CVE-2023-4813 https://nvd.nist.gov/vuln/detail/CVE-2023-4813
- https://bugzilla.redhat.com/show_bug.cgi?id=2237798
- https://access.redhat.com/errata/RHSA-2023:5455
- https://access.redhat.com/errata/RHSA-2023:5453
- https://access.redhat.com/security/cve/CVE-2023-4813
- http://www.openwall.com/lists/oss-security/2023/10/03/8
- https://security.netapp.com/advisory/ntap-20231110-0003/
- https://access.redhat.com/errata/RHSA-2023:7409
- https://launchpad.net/bugs/cve/CVE-2023-4813
- https://sourceware.org/bugzilla/show_bug.cgi?id=28931
- https://sourceware.org/git/?p=glibc.git;a=commitdiff;h=1c37b8022e8763fedbb3f79c02e05c6acfe5a215
- https://security-tracker.debian.org/tracker/CVE-2023-4813
- https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=1c37b8022e8763fedbb3f79c02e05c6acfe5a215
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2238609
- https://ubuntu.com/security/notices/USN-6541-1
- https://ubuntu.com/security/notices/USN-6541-2
- https://www.cve.org/CVERecord?id=CVE-2023-4813
- https://nvd.nist.gov/vuln/detail/CVE-2023-4813
- https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=6e867146ee01de3ed1e94e777372093812a578e9
- https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=228cdb00a045ae3b68a91b35c7548bab6029446e
- https://ubuntu.com/security/CVE-2023-4813
Parent vulnerabilities
(Appears in the following advisories)
Frequently Asked Questions
What is CVE-2023-4813?
CVE-2023-4813 is a vulnerability found in glibc that can result in an application crash when the getaddrinfo function is called.
What is the severity of CVE-2023-4813?
The severity of CVE-2023-4813 is medium with a CVSS score of 5.9.
How does CVE-2023-4813 affect Redhat Enterprise Linux 8.0?
Redhat Enterprise Linux 8.0 is affected by CVE-2023-4813.
How do I fix CVE-2023-4813?
To fix CVE-2023-4813, update the glibc package to version 2.36 or apply the recommended fix provided by Redhat.
Where can I find more information about CVE-2023-4813?
You can find more information about CVE-2023-4813 on the CVE website and the NIST National Vulnerability Database.
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