e2fsprogs: Out-of-bounds write in e2fsck/rehash.c (CVE-2019-5188)

A code execution vulnerability exists in the directory rehashing functionality of E2fsprogs e2fsck 1.45.4. A specially crafted ext4 directory can cause an out-of-bounds write on the stack, resulting in code execution. An attacker can corrupt a partition to trigger this vulnerability.

Fixed In Version:

e2fsprogs 1.45.5

References:

• https://talosintelligence.com/vulnerability_reports/TALOS-2019-0973
• https://nvd.nist.gov/vuln/detail/CVE-2019-5188

Patches:

• https://github.com/tytso/e2fsprogs/commit/8dd73c149f418238f19791f9d666089ef9734dff
• https://github.com/tytso/e2fsprogs/commit/71ba13755337e19c9a826dfc874562a36e1b24d3

Affected branches:

• master (d8efadc5)
• 3.11-stable (96134951)
• 3.10-stable (2ed804fc)
• 3.9-stable (948fd324)
• 3.8-stable (18b5cab2)