kernel: fuse-backed file mmap-ed onto process cmdline arguments causes denial of service
Published Jun 20, 2018
5.3
MEDIUMCVSS 3.0
EPSS 7.20%
Description
A flaw was found affecting the Linux kernel before version 4.17. By mmap()ing a FUSE-backed file onto a process's memory containing command line arguments (or environment strings), an attacker can cause utilities from psutils or procps (such as ps, w) or any other program which makes a read() call to the /proc/<pid>/cmdline (or /proc/<pid>/environ) files to block indefinitely (denial of service) or for some controlled time (as a synchronization primitive for other attacks).
Affected products
- Vendor n/a Product Kernel Defaultunknown
Affected
- kernel 4.17
Default status is the baseline for the product. Each version can override it (patched versions can be marked unaffected).
| Vendor | Product | Default status | Versions |
|---|---|---|---|
| n/a | Kernel | unknown | Affected
|
Configuration 1
- < 4.17
Configuration 2
- 4.0
- 7.0
- 7.0
- 7.0
Configuration 3
- 8.0
Configuration 4
- 16.04
- 18.04
No data.
Red Hat Enterprise Linux 7
kernel-0:3.10.0-957.el7
Fixed · RHSA-2018:3083
Red Hat Enterprise Linux 7
kernel-alt-0:4.14.0-115.el7a
Fixed · RHSA-2018:2948
Red Hat Enterprise Linux 7
kernel-rt-0:3.10.0-957.rt56.910.el7
Fixed · RHSA-2018:3096
Red Hat Enterprise Linux 7.4 Advanced Update Support
kernel-0:3.10.0-693.76.1.el7
Fixed · RHSA-2020:3804
Red Hat Enterprise Linux 7.4 Telco Extended Update Support
kernel-0:3.10.0-693.76.1.el7
Fixed · RHSA-2020:3804
Red Hat Enterprise Linux 7.4 Update Services for SAP Solutions
kernel-0:3.10.0-693.76.1.el7
Fixed · RHSA-2020:3804
Red Hat Enterprise MRG 2
kernel-rt-1:3.10.0-693.76.1.rt56.676.el6rt
Fixed · RHSA-2020:3810
Red Hat Enterprise Linux 5
kernel
Will not fix
Red Hat Enterprise Linux 6
kernel
Will not fix
Red Hat Enterprise Linux 8
kernel
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 7 | kernel-0:3.10.0-957.el7 | Fixed | RHSA-2018:3083 |
| Red Hat Enterprise Linux 7 | kernel-alt-0:4.14.0-115.el7a | Fixed | RHSA-2018:2948 |
| Red Hat Enterprise Linux 7 | kernel-rt-0:3.10.0-957.rt56.910.el7 | Fixed | RHSA-2018:3096 |
| Red Hat Enterprise Linux 7.4 Advanced Update Support | kernel-0:3.10.0-693.76.1.el7 | Fixed | RHSA-2020:3804 |
| Red Hat Enterprise Linux 7.4 Telco Extended Update Support | kernel-0:3.10.0-693.76.1.el7 | Fixed | RHSA-2020:3804 |
| Red Hat Enterprise Linux 7.4 Update Services for SAP Solutions | kernel-0:3.10.0-693.76.1.el7 | Fixed | RHSA-2020:3804 |
| Red Hat Enterprise MRG 2 | kernel-rt-1:3.10.0-693.76.1.rt56.676.el6rt | Fixed | RHSA-2020:3810 |
| Red Hat Enterprise Linux 5 | kernel | Will not fix | n/a |
| Red Hat Enterprise Linux 6 | kernel | Will not fix | n/a |
| Red Hat Enterprise Linux 8 | kernel | Not affected | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
References (20)
- http://seclists.org/oss-sec/2018/q2/122 mailing-listx_refsource_MLISTExploitMailing ListThird Party Advisory
- http://www.securityfocus.com/bid/104229 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- https://access.redhat.com/errata/RHSA-2018:2948 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHSA-2018:3083 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHSA-2018:3096 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2018-1120 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1575472 Issue Tracking
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-1120 x_refsource_CONFIRMIssue TrackingPatchThird Party Advisory
- https://euvd.enisa.europa.eu/vulnerability/EUVD-2018-11764 Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7f7ccc2ccc2e70c6054685f5e3522efa81556830 x_refsource_CONFIRMPatchThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/07/msg00020.html mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2018-1120
- https://security.gentoo.org/glsa/201805-14 vendor-advisoryx_refsource_GENTOOThird Party Advisory
- https://usn.ubuntu.com/3752-1/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://usn.ubuntu.com/3752-2/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://usn.ubuntu.com/3752-3/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://usn.ubuntu.com/3910-1/ vendor-advisoryx_refsource_UBUNTU
- https://usn.ubuntu.com/3910-2/ vendor-advisoryx_refsource_UBUNTU
- https://www.cve.org/CVERecord?id=CVE-2018-1120
- https://www.exploit-db.com/exploits/44806/ exploitx_refsource_EXPLOIT-DBThird Party AdvisoryVDB Entry
Change history (0)
No recorded changes yet.
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