Integer Overflow or Wraparound Affecting grub2-signed package, versions <1.34.22
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Test your applications- Snyk ID SNYK-UBUNTU1404-GRUB2SIGNED-596066
- published 29 Jul 2020
- disclosed 30 Jul 2020
Introduced: 29 Jul 2020
CVE-2020-14309 Open this link in a new tabHow to fix?
Upgrade Ubuntu:14.04 grub2-signed to version 1.34.22 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream grub2-signed package and not the grub2-signed package as distributed by Ubuntu.
See How to fix? for Ubuntu:14.04 relevant fixed versions and status.
There's an issue with grub2 in all versions before 2.06 when handling squashfs filesystems containing a symbolic link with name length of UINT32 bytes in size. The name size leads to an arithmetic overflow leading to a zero-size allocation further causing a heap-based buffer overflow with attacker controlled data.
References
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2020-14309
- https://security-tracker.debian.org/tracker/CVE-2020-14309
- https://security.netapp.com/advisory/ntap-20200731-0008/
- https://security.gentoo.org/glsa/202104-05
- https://bugzilla.redhat.com/show_bug.cgi?id=1852022
- http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00016.html
- http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00017.html
- https://usn.ubuntu.com/4432-1/