Heap-based Buffer Overflow Affecting grub2-efi-ia32-cdboot package, versions <1:2.02-0.81.0.3.el7
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Test your applications- Snyk ID SNYK-ORACLE7-GRUB2EFIIA32CDBOOT-2576536
- published 10 Apr 2022
- disclosed 31 Jul 2020
How to fix?
Upgrade Oracle:7 grub2-efi-ia32-cdboot to version 1:2.02-0.81.0.3.el7 or higher.
This issue was patched in ELSA-2020-5782.
NVD Description
Note: Versions mentioned in the description apply only to the upstream grub2-efi-ia32-cdboot package and not the grub2-efi-ia32-cdboot package as distributed by Oracle.
See How to fix? for Oracle:7 relevant fixed versions and status.
There is an issue with grub2 before version 2.06 while handling symlink on ext filesystems. A filesystem containing a symbolic link with an inode size of UINT32_MAX causes an arithmetic overflow leading to a zero-sized memory allocation with subsequent heap-based buffer overflow.
References
- https://linux.oracle.com/cve/CVE-2020-14311.html
- https://linux.oracle.com/errata/ELSA-2020-5782.html
- https://linux.oracle.com/errata/ELSA-2020-5790.html
- http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00016.html
- http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00017.html
- http://www.openwall.com/lists/oss-security/2021/09/17/2
- http://www.openwall.com/lists/oss-security/2021/09/17/4
- http://www.openwall.com/lists/oss-security/2021/09/21/1
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-14311
- https://security.gentoo.org/glsa/202104-05
- https://usn.ubuntu.com/4432-1/