Vulnerability · Published Jul 29, 2020 · Assigned by redhat
CVE-2020-14308
Medium 6.4
In plain English
A medium-severity security flaw in Grub. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 38% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)6.4Medium
Exploit odds (30 days)0.4%top 62.3% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
In grub2 versions before 2.06 the grub memory allocator doesn't check for possible arithmetic overflows on the requested allocation size. This leads the function to return invalid memory allocations which can be further used to cause possible integrity, confidentiality and availability impacts during the boot process.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.20 | grub | 2.06-r0 | ALPINE-CVE-2020-14308 |
| Alpine:v3.21 | grub | 2.06-r0 | ALPINE-CVE-2020-14308 |
| Alpine:v3.22 | grub | 2.06-r0 | ALPINE-CVE-2020-14308 |
| Alpine:v3.23 | grub | 2.06-r0 | ALPINE-CVE-2020-14308 |
| Alpine:v3.24 | grub | 2.06-r0 | ALPINE-CVE-2020-14308 |
| Debian:12 | grub2 | 2.04-9 | DEBIAN-CVE-2020-14308 |
| Debian:13 | grub2 | 2.04-9 | DEBIAN-CVE-2020-14308 |
| Debian:14 | grub2 | 2.04-9 | DEBIAN-CVE-2020-14308 |
Affected products (as reported)
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1852009 x_refsource_MISC
- [oss-security] 20200729 multiple secure boot grub2 and linux kernel vulnerabilities mailing-list, x_refsource_MLIST
- https://security.netapp.com/advisory/ntap-20200731-0008/ x_refsource_CONFIRM
- USN-4432-1 vendor-advisory, x_refsource_UBUNTU
- openSUSE-SU-2020:1169 vendor-advisory, x_refsource_SUSE
- openSUSE-SU-2020:1168 vendor-advisory, x_refsource_SUSE
- GLSA-202104-05 vendor-advisory, x_refsource_GENTOO
- [oss-security] 20210916 Containers-optimized OS (COS) membership in the linux-distros list mailing-list, x_refsource_MLIST
- [oss-security] 20210917 Re: Containers-optimized OS (COS) membership in the linux-distros list mailing-list, x_refsource_MLIST
- [oss-security] 20210920 Re: Containers-optimized OS (COS) membership in the linux-distros list mailing-list, x_refsource_MLIST