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Review reviewHigh

CVE-2024-43882

Linux Linux, RUGGEDCOM RST2428P, SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family

In the Linux kernel, the following vulnerability has been resolved: exec: Fix ToCToU between perm check and set-uid/gid usage When opening a file for exec via do_filp_open(), permission checking is done against the file's metadata at that moment, and on success, a file pointer is passed back. Much later in the execve() code path, the file metadata (specifically mode, uid, and gid) is used to determine if/how to set the uid and gid. However, those values may have changed since the permissions check, meaning the execution may gain unintended privileges. For example, if a file could change per...

CVSS
7
EPSS
0.24%
15.4% percentile
CISA KEV
Not listed
Published
2024.08.21
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.24%
Technical severityCVSS 7

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: exec: Fix ToCToU between perm check and set-uid/gid usage When opening a file for exec via do_filp_open(), permission checking is done against the file's metadata at that moment, and on success, a file pointer is passed back. Much later in the execve() code path, the file metadata (specifically mode, uid, and gid) is used to determine if/how to set the uid and gid. However, those values may have changed since the permissions check, meaning the execution may gain unintended privileges. For example, if a file could change per...

Affected product and versions

Product
Linux Linux, RUGGEDCOM RST2428P, SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family
Affected versions
>= 9167b0b9a0ab7907191523f5a0528e3b9c288e21 < d5c3c7e26275a2d83b894d30f7582a42853a958f, >= 9167b0b9a0ab7907191523f5a0528e3b9c288e21 < 368f6985d46657b8b466a421dddcacd4051f7ada, >= 9167b0b9a0ab7907191523f5a0528e3b9c288e21 < 15469d46ba34559bfe7e3de6659115778c624759, >= 9167b0b9a0ab7907191523f5a0528e3b9c288e21 < 9b424c5d4130d56312e2a3be17efb0928fec4d64, >= 9167b0b9a0ab7907191523f5a0528e3b9c288e21 < f6cfc6bcfd5e1cf76115b6450516ea4c99897ae1, >= 9167b0b9a0ab7907191523f5a0528e3b9c288e21 < d2a2a4714d80d09b0f8eb6438ab4224690b7121e, >= 9167b0b9a0ab7907191523f5a0528e3b9c288e21 < 90dfbba89ad4f0d9c9744ecbb1adac4aa2ff4f3e, >= 9167b0b9a0ab7907191523f5a0528e3b9c288e21 < f50733b45d865f91db90919f8311e2127ce5a0cb, >= 2.6.18, < V3.1, < 4.19.320, >= 4.20 < 5.4.282, >= 5.5 < 5.10.224, >= 5.11 < 5.15.165, >= 5.16 < 6.1.106, >= 6.2 < 6.6.47, >= 6.7 < 6.10.6, 6.11
Fixed versions
4.19.320, 5.4.282, 5.10.224, 5.15.165, 6.1.106, 6.6.47, 6.10.6

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux Linux, RUGGEDCOM RST2428P, SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
CWE-367