SecuriTricks - CVE-2024-50010

Description

In the Linux kernel, the following vulnerability has been resolved: exec: don't WARN for racy path_noexec check Both i_mode and noexec checks wrapped in WARN_ON stem from an artifact of the previous implementation. They used to legitimately check for the condition, but that got moved up in two commits: 633fb6ac3980 ("exec: move S_ISREG() check earlier") 0fd338b2d2cd ("exec: move path_noexec() check earlier") Instead of being removed said checks are WARN_ON'ed instead, which has some debug value. However, the spurious path_noexec check is racy, resulting in unwarranted warnings should someone race with setting the noexec flag. One can note there is more to perm-checking whether execve is allowed and none of the conditions are guaranteed to still hold after they were tested for. Additionally this does not validate whether the code path did any perm checking to begin with -- it will pass if the inode happens to be regular. Keep the redundant path_noexec() check even though it's mindless nonsense checking for guarantee that isn't given so drop the WARN. Reword the commentary and do small tidy ups while here. [brauner: keep redundant path_noexec() check]

Product(s) Impacted

Vendor	Product	Versions
Linux	Linux Kernel	*

Weaknesses

Common security weaknesses mapped to this vulnerability.

*CPE(s)

Affected systems and software identified for this CVE.

Type	Vendor	Product	Version	Update	Edition	Language	Software Edition	Target Software	Target Hardware	Other Information
o	linux	linux_kernel	/	/	/	/	/	/	/	/

References

https://git.kernel.org/stable/c/0bdf77be2330062b3a64f2bec39f62ab874a6796

https://git.kernel.org/stable/c/0d16f53c91111cec914f0811fcc526a2ba77b20d

https://git.kernel.org/stable/c/0d196e7589cefe207d5d41f37a0a28a1fdeeb7c6

https://git.kernel.org/stable/c/b723f96407a0a078cf75970e4dbf16b46d286a61

https://git.kernel.org/stable/c/c9b77438077d5a20c79ead95bcdaf9bd4797baaf

https://git.kernel.org/stable/c/d62ba2a5536df83473a2ac15ab302258e3845251

CVSS Score

4.7 / 10

CVSS Data - 3.1

Attack Vector: LOCAL
Attack Complexity: HIGH
Privileges Required: LOW
Scope: UNCHANGED
Confidentiality Impact: NONE
Integrity Impact: NONE
Availability Impact: HIGH

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

View Vector String

Timeline

Published: Oct. 21, 2024, 7:15 p.m.
Last Modified: Nov. 8, 2024, 4:15 p.m.

Status : Modified

CVE has been recently published to the CVE List and has been received by the NVD.

More info

Source

416baaa9-dc9f-4396-8d5f-8c081fb06d67

CVE-2024-50010