chrony: Insecure writing to PID file
Published Aug 24, 2020
6.0
MEDIUMCVSS 3.1
EPSS 0.48%
Description
A flaw was found in chrony versions before 3.5.1 when creating the PID file under the /var/run/chrony folder. The file is created during chronyd startup while still running as the root user, and when it's opened for writing, chronyd does not check for an existing symbolic link with the same file name. This flaw allows an attacker with privileged access to create a symlink with the default PID file name pointing to any destination file in the system, resulting in data loss and a denial of service due to the path traversal.
Affected products
- Vendor n/a Product Chrony Defaultn/a
- Version All chrony versions before 3.5.1StatusaffectedConstraints-
- 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 | Chrony | n/a |
|
Configuration 2
- 32
Configuration 3
- 18.04
- 20.04
No data.
Red Hat Enterprise Linux 6
chrony
Out of support scope
Red Hat Enterprise Linux 7
chrony
Will not fix
Red Hat Enterprise Linux 8
chrony
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 6 | chrony | Out of support scope | n/a |
| Red Hat Enterprise Linux 7 | chrony | Will not fix | n/a |
| Red Hat Enterprise Linux 8 | chrony | Not affected | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
References (7)
- https://access.redhat.com/security/cve/CVE-2020-14367 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1870298 x_refsource_MISCIssue TrackingPatchVendor Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6WKABKNLCSC3MACCWU6OM2YGWVWFWFMU/ vendor-advisoryx_refsource_FEDORA
- https://nvd.nist.gov/vuln/detail/CVE-2020-14367
- https://security.gentoo.org/glsa/202008-23 vendor-advisoryx_refsource_GENTOOThird Party Advisory
- https://usn.ubuntu.com/4475-1/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2020-14367
| Link | Providers | Tags |
|---|---|---|
| https://access.redhat.com/security/cve/CVE-2020-14367 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1870298 | x_refsource_MISCIssue TrackingPatchVendor Advisory | |
| https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6WKABKNLCSC3MACCWU6OM2YGWVWFWFMU/ | vendor-advisoryx_refsource_FEDORA | |
| https://nvd.nist.gov/vuln/detail/CVE-2020-14367 | ||
| https://security.gentoo.org/glsa/202008-23 | vendor-advisoryx_refsource_GENTOOThird Party Advisory | |
| https://usn.ubuntu.com/4475-1/ | vendor-advisoryx_refsource_UBUNTUThird Party Advisory | |
| https://www.cve.org/CVERecord?id=CVE-2020-14367 |
Change history (0)
No recorded changes yet.