Description
Istio (1.8.x, 1.9.0-1.9.5 and 1.10.0-1.10.1) contains a remotely exploitable vulnerability where credentials specified in the Gateway and DestinationRule credentialName field can be accessed from different namespaces.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | istio +3 | 1.9.6-2.el8 | ELSA-2021-9398, ELSA-2021-9396 |
| Oracle Linux 8 | kubeadm +2 | 1.18.18-3.el8 | ELSA-2021-9398, ELSA-2021-9396 |
| Oracle Linux 8 | olcne-olm-chart +1 | 1.3.1-5.el8 | ELSA-2021-9398 |
| Oracle Linux 8 | olcnectl +6 | 1.2.4-5.el8 | ELSA-2021-9398, ELSA-2021-9396 |
| Oracle Linux 7 | istio +1 | 1.9.6-2.el7 | ELSA-2021-9399, ELSA-2021-9397 |
| Oracle Linux 7 | kubeadm +2 | 1.18.18-3.el7 | ELSA-2021-9399, ELSA-2021-9397 |
| Oracle Linux 7 | olcne-olm-chart +1 | 1.3.1-5.el7 | ELSA-2021-9399 |
| Oracle Linux 7 | olcnectl +6 | 1.2.4-5.el7 | ELSA-2021-9399, ELSA-2021-9397 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
GitHub 1 repository
-
rsalmond/CVE-2021-34824 ★ 0 · Dec 23, 2022
reproducing an old istio bug
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 4
- ELSA-2021-9398 Important: olcne security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Aug 6, 2021
- ELSA-2021-9396 Important: olcne security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Aug 6, 2021
- ELSA-2021-9399 Important: olcne security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Aug 6, 2021
- ELSA-2021-9397 Important: olcne security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Aug 6, 2021