ima: Fix stack-out-of-bounds in is_bprm_creds_for_exec()
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 6.18.58, 6.19.4
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
In the Linux kernel, the following vulnerability has been resolved: ima: Fix stack-out-of-bounds in is_bprm_creds_for_exec() KASAN reported a stack-out-of-bounds access in ima_appraise_measurement from is_bprm_creds_for_exec: BUG: KASAN: stack-out-of-bounds in ima_appraise_measurement+0x12dc/0x16a0 Read of size 1 at addr ffffc9000160f940 by task sudo/550 The buggy address belongs to stack of task sudo/550 and is located at offset 24 in frame: ima_appraise_measurement+0x0/0x16a0 This frame has 2 objects: [48, 56) 'file' [80, 148) 'hash' This is caused by using container_of on the *file pointer. This offset calculation is what triggers the stack-out-of-bounds error. In order to fix this, pass in a bprm_is_check boolean which can be set depending on how process_measurement is called. If the caller has a linux_binprm pointer and the function is BPRM_CHECK we can determine is_check and set it then. Otherwise set it to false.
Timeline
- CVE published
- Record last updated
Affected versions
- Linux Linux
From 95b3cdafd7cb74414070893445a9b731793f7b55 · fixed in 0f39d936a34933ebfbdc13a04f0aba814d3b9709; From 95b3cdafd7cb74414070893445a9b731793f7b55 · fixed in ab3d16da982a4ebb715d487dbf9dd66e3990d935; From 95b3cdafd7cb74414070893445a9b731793f7b55 · fixed in 377cae9851e8559e9d8b82a78c1ac0abeb18839c
- Linux Linux
6.14
- KernelLinux
From 6.14.0 · fixed in 6.18.58; From 6.19.0 · fixed in 6.19.4