CVE-2022-28736
There's a use-after-free vulnerability in grub_cmd_chainloader() function; The chainloader command is used to boot up operating systems that doesn't support multiboot and do not have direct support from GRUB2.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.29%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
There's a use-after-free vulnerability in grub_cmd_chainloader() function; The chainloader command is used to boot up operating systems that doesn't support multiboot and do not have direct support from GRUB2. When executing chainloader more than once a use-after-free vulnerability is triggered. If an attacker can control the GRUB2's memory allocation pattern sensitive data may be exposed and arbitrary code execution can be achieved.
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.29% probability · 21th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-416
- Affected
- gnu/grub2
- Source
- security@ubuntu.com
References
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-28736Third Party Advisory
- https://security.netapp.com/advisory/ntap-20230825-0002/
- https://www.openwall.com/lists/oss-security/2022/06/07/5Mailing List, Third Party Advisory
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-28736Third Party Advisory
- https://security.netapp.com/advisory/ntap-20230825-0002/
- https://www.openwall.com/lists/oss-security/2022/06/07/5Mailing List, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.