CVE-2022-2526: Use After Free
First published: Fri Jul 22 2022(Updated: )
systemd could allow a remote attacker to execute arbitrary code on the system, caused by a use-after-free flaw due to the on_stream_io() function and dns_stream_complete() function in "resolved-dns-stream.c" not incrementing the reference counting for the DnsStream object. By sending a specially-crafted request, an attacker could exploit this vulnerability to execute arbitrary code or cause a denial of service condition on the system.
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/systemd | <0:219-78.el7_9.7 | 0:219-78.el7_9.7 |
| redhat/systemd | <0:239-58.el8_6.4 | 0:239-58.el8_6.4 |
| redhat/systemd | <0:239-18.el8_1.11 | 0:239-18.el8_1.11 |
| redhat/systemd | <0:239-31.el8_2.9 | 0:239-31.el8_2.9 |
| redhat/systemd | <0:239-45.el8_4.12 | 0:239-45.el8_4.12 |
| IBM BM Security Guardium | <=11.3 | |
| IBM Security Guardium | <=11.4 | |
| IBM Security Guardium | <=11.5 | |
| redhat/systemd | <240 | 240 |
| Systemd Project Systemd | =240 | |
| Netapp Active Iq Unified Manager Vmware Vsphere | ||
| Netapp H300s Firmware | ||
| Netapp H300s | ||
| Netapp H500s Firmware | ||
| Netapp H500s | ||
| Netapp H700s Firmware | ||
| Netapp H700s | ||
| Netapp H410s Firmware | ||
| Netapp H410s |
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Reference Links
- https://exchange.xforce.ibmcloud.com/vulnerabilities/235161
- https://www.ibm.com/support/pages/node/6999317 (Advisory)
- https://github.com/systemd/systemd/commit/d973d94dec349fb676fdd844f6fe2ada3538f27c
- https://security.netapp.com/advisory/ntap-20221111-0005/
- https://access.redhat.com/errata/RHSA-2022:6163
- https://access.redhat.com/errata/RHSA-2022:6162
- https://access.redhat.com/errata/RHSA-2022:6161
- https://access.redhat.com/errata/RHSA-2022:6160
- https://access.redhat.com/errata/RHSA-2022:6206
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2123211
- https://access.redhat.com/security/cve/cve-2022-2526
- https://access.redhat.com/errata/RHSA-2022:6551
- https://bugzilla.redhat.com/show_bug.cgi?id=2109926
- https://www.cve.org/CVERecord?id=CVE-2022-2526 https://nvd.nist.gov/vuln/detail/CVE-2022-2526
Parent vulnerabilities
(Appears in the following advisories)
Frequently Asked Questions
What is the severity of CVE-2022-2526?
The severity of CVE-2022-2526 is critical.
How does CVE-2022-2526 occur?
CVE-2022-2526 occurs due to a use-after-free vulnerability in systemd.
Which functions in systemd are affected by CVE-2022-2526?
The on_stream_io() function and dns_stream_complete() function in 'resolved-dns-stream.c' are affected by CVE-2022-2526.
Which versions of systemd are affected by CVE-2022-2526?
The versions affected by CVE-2022-2526 include systemd 240, 0:219-78.el7_9.7, 0:239-58.el8_6.4, 0:239-18.el8_1, 0:239-31.el8_2, and 0:239-45.el8_4.12.
How can I fix CVE-2022-2526?
To fix CVE-2022-2526, you need to update systemd to version 240 or apply the appropriate remedy provided by the package distributor.
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