Bug 1784130 (CVE-2019-19319) - CVE-2019-19319 kernel: out-of-bounds write in ext4_xattr_set_entry in fs/ext4/xattr.c
Summary: CVE-2019-19319 kernel: out-of-bounds write in ext4_xattr_set_entry in fs/ext4...
Keywords:
Status: NEW
Alias: CVE-2019-19319
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1784131
Blocks: 1784135
TreeView+ depends on / blocked
 
Reported: 2019-12-16 18:50 UTC by Guilherme de Almeida Suckevicz
Modified: 2019-12-29 10:34 UTC (History)
46 users (show)

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Description Guilherme de Almeida Suckevicz 2019-12-16 18:50:52 UTC
In the Linux kernel 5.0.21, a setxattr operation, after a mount of a crafted ext4 image, can cause a slab-out-of-bounds write access because of an ext4_xattr_set_entry use-after-free in fs/ext4/xattr.c when a large old_size value is used in a memset call.

Reference:
https://github.com/bobfuzzer/CVE/tree/master/CVE-2019-19319

Comment 1 Guilherme de Almeida Suckevicz 2019-12-16 18:51:52 UTC
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1784131]


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