CVE-2023-21102
First published: Mon May 01 2023(Updated: )
In __efi_rt_asm_wrapper of efi-rt-wrapper.S, there is a possible bypass of shadow stack protection due to a logic error in the code. This could lead to local escalation of privilege with no additional execution privileges needed. Reference: <a href="https://android.googlesource.com/kernel/common/+/ec6fe823507b2f6ef4a58f3a9bee9a5ec086c32c%5E%21/">https://android.googlesource.com/kernel/common/+/ec6fe823507b2f6ef4a58f3a9bee9a5ec086c32c%5E%21/</a> <a href="https://source.android.com/docs/security/bulletin/2023-05-01">https://source.android.com/docs/security/bulletin/2023-05-01</a>
Credit: security@android.com security@android.com security@android.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/Kernel | <6.2 | 6.2 |
| Android | ||
| Android | ||
| debian/linux | 5.10.223-1 5.10.234-1 6.1.129-1 6.1.133-1 6.12.21-1 6.12.22-1 |
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Reference Links
- https://source.android.com/security/bulletin/2023-05-01
- https://launchpad.net/bugs/cve/CVE-2023-21102
- https://android.googlesource.com/kernel/common/+/ec6fe823507b2f6ef4a58f3a9bee9a5ec086c32c
- https://android.googlesource.com/kernel/common/+/984241bdc04f401c423005a52eb013b00e19358c
- https://source.android.com/docs/security/bulletin/2023-05-01 (Advisory)
- https://android.googlesource.com/kernel/common/+/ec6fe823507b2f6ef4a58f3a9bee9a5ec086c32c%5E%21/
- https://access.redhat.com/errata/RHSA-2023:5091
- https://access.redhat.com/errata/RHSA-2023:5069
- https://bugzilla.redhat.com/show_bug.cgi?id=2213455
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-21102
- https://nvd.nist.gov/vuln/detail/CVE-2023-21102
- https://security-tracker.debian.org/tracker/CVE-2023-21102
- https://ubuntu.com/security/CVE-2023-21102
- https://git.kernel.org/linus/ff7a167961d1b97e0e205f245f806e564d3505e7
- https://git.kernel.org/linus/18bba1843fc7f264f58c9345d00827d082f9c558
Frequently Asked Questions
What is the severity of CVE-2023-21102?
CVE-2023-21102 has the potential for local escalation of privilege due to a bypass of shadow stack protection.
How do I fix CVE-2023-21102?
To fix CVE-2023-21102, you should update the Linux kernel to version 6.2 or later or to one of the specific patched versions provided by your Linux distribution.
Which software is affected by CVE-2023-21102?
CVE-2023-21102 affects Google Android and various versions of the Linux kernel including specific versions from Debian and Red Hat.
What type of vulnerability is CVE-2023-21102?
CVE-2023-21102 is categorized as a logic error vulnerability leading to a possible bypass of security mechanisms.
Can CVE-2023-21102 be exploited remotely?
CVE-2023-21102 requires local access to the system for exploitation, as it involves escalation of privilege.
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