An issue was discovered in dns.c in HAProxy through 1.8.14. In the case of a compressed pointer, a crafted packet can trigger infinite recursion by making the pointer point to itself, or create a long chain of valid pointers resulting in stack exhaustion.
The MITRE CVE dictionary describes this issue as:
Find out more about CVE-2018-20103 from the MITRE CVE dictionary dictionary and NIST NVD.
This issue did not affect the versions of haproxy as shipped with Red Hat Enterprise Linux 6 and 7.
NOTE: The following CVSS v3 metrics and score provided are preliminary and subject to review.
CVSS3 Base Score | 7.5 |
---|---|
CVSS3 Base Metrics | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Attack Vector | Network |
Attack Complexity | Low |
Privileges Required | None |
User Interaction | None |
Scope | Unchanged |
Confidentiality | None |
Integrity Impact | None |
Availability Impact | High |
Platform | Package | State |
---|---|---|
Red Hat Software Collections for Red Hat Enterprise Linux | rh-haproxy18-haproxy | Affected |
Red Hat OpenShift Container Platform 3.9 | haproxy | Affected |
Red Hat OpenShift Container Platform 3.7 | haproxy | Affected |
Red Hat OpenShift Container Platform 3.11 | haproxy | Affected |
Red Hat OpenShift Container Platform 3.10 | haproxy | Affected |
Red Hat Enterprise Linux 7 | haproxy | Not affected |
Red Hat Enterprise Linux 6 | haproxy | Not affected |