A NULL pointer dereference flaw was found in the Linux kernel's SELinux subsystem in versions before 5.7. This flaw occurs while importing the Commercial IP Security Option (CIPSO) protocol's category bitmap into the SELinux extensible bitmap via the' ebitmap_netlbl_import' routine. While processing the CIPSO restricted bitmap tag in the 'cipso_v4_parsetag_rbm' routine, it sets the security attribute to indicate that the category bitmap is present, even if it has not been allocated. This issue leads to a NULL pointer dereference issue while importing the same category bitmap into SELinux. This flaw allows a remote network user to crash the system kernel, resulting in a denial of service.
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Advisories
| Source | ID | Title |
|---|---|---|
Debian DLA |
DLA-2242-1 | linux-4.9 security update |
Debian DSA |
DSA-4698-1 | linux security update |
Debian DSA |
DSA-4699-1 | linux security update |
EUVD |
EUVD-2020-3141 | A NULL pointer dereference flaw was found in the Linux kernel's SELinux subsystem in versions before 5.7. This flaw occurs while importing the Commercial IP Security Option (CIPSO) protocol's category bitmap into the SELinux extensible bitmap via the' ebitmap_netlbl_import' routine. While processing the CIPSO restricted bitmap tag in the 'cipso_v4_parsetag_rbm' routine, it sets the security attribute to indicate that the category bitmap is present, even if it has not been allocated. This issue leads to a NULL pointer dereference issue while importing the same category bitmap into SELinux. This flaw allows a remote network user to crash the system kernel, resulting in a denial of service. |
Ubuntu USN |
USN-4411-1 | Linux kernel vulnerabilities |
Ubuntu USN |
USN-4412-1 | Linux kernel vulnerabilities |
Ubuntu USN |
USN-4413-1 | Linux kernel vulnerabilities |
Ubuntu USN |
USN-4414-1 | Linux kernel vulnerabilities |
Ubuntu USN |
USN-4419-1 | Linux kernel vulnerabilities |
Fixes
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
References
History
No history.
Projects
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Status: PUBLISHED
Assigner: redhat
Published:
Updated: 2024-08-04T11:14:14.192Z
Reserved: 2020-03-20T00:00:00
Link: CVE-2020-10711
No data.
Status : Modified
Published: 2020-05-22T15:15:11.207
Modified: 2024-11-21T04:55:54.213
Link: CVE-2020-10711
OpenCVE Enrichment
No data.
Weaknesses
Debian DLA
Debian DSA
EUVD
Ubuntu USN