kernel: iptables string match rule could result in kernel panic
Published May 26, 2021
4.4
MEDIUMCVSS 3.1
EPSS 0.28%
Description
A flaw was found in the Linux kernel's implementation of string matching within a packet. A privileged user (with root or CAP_NET_ADMIN) when inserting iptables rules could insert a rule which can panic the system. Kernel before kernel 5.5-rc1 is affected.
Affected products
- Vendor n/a Product Kernel Defaultn/a
- Version kernel 5.5-rc1StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| n/a | Kernel | n/a |
|
- ≤ 5.4.9
No data.
Red Hat Enterprise Linux 5
kernel
Out of support scope
Red Hat Enterprise Linux 6
kernel
Out of support scope
Red Hat Enterprise Linux 7
kernel
Not affected
Red Hat Enterprise Linux 7
kernel-alt
Not affected
Red Hat Enterprise Linux 8
kernel
Not affected
Red Hat Enterprise Linux 8
kernel-rt
Not affected
Red Hat Enterprise MRG 2
kernel-rt
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | kernel | Out of support scope | n/a |
| Red Hat Enterprise Linux 6 | kernel | Out of support scope | n/a |
| Red Hat Enterprise Linux 7 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 7 | kernel-alt | Not affected | n/a |
| Red Hat Enterprise Linux 8 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 8 | kernel-rt | Not affected | n/a |
| Red Hat Enterprise MRG 2 | kernel-rt | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat mitigation
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
References (5)
- https://access.redhat.com/security/cve/CVE-2021-20177 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1914719 x_refsource_MISCIssue TrackingPatchThird Party Advisory
- https://euvd.enisa.europa.eu/vulnerability/EUVD-2021-7634 Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2021-20177
- https://www.cve.org/CVERecord?id=CVE-2021-20177
| Link | Providers | Tags |
|---|---|---|
| https://access.redhat.com/security/cve/CVE-2021-20177 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1914719 | x_refsource_MISCIssue TrackingPatchThird Party Advisory | |
| https://euvd.enisa.europa.eu/vulnerability/EUVD-2021-7634 | Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2021-20177 | ||
| https://www.cve.org/CVERecord?id=CVE-2021-20177 |
Change history (0)
No recorded changes yet.