Libslirp: libslirp: icmp echo reply length desynchronization leaks host ip to guest
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions |
|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 | affected | — |
| Red Hat | Red Hat Enterprise Linux 8 | affected | — |
| Red Hat | Red Hat Enterprise Linux 9 | affected | — |
| Red Hat | Red Hat OpenShift Container Platform 4 | affected | — |
No data.
No data.
No data available yet.
Vendor Workaround
Ensure that the QEMU process user's GID is included in the system's ping_group_range (sysctl net.ipv4.ping_group_range), which allows the SOCK_DGRAM ICMP socket path and avoids the vulnerable raw socket fallback. Alternatively, use --net none or virtio-net with a TAP backend instead of user-mode (slirp) networking.
No CVSS v4.0
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.239% probability within 30 days)
| Type | Values Removed | Values Added |
|---|---|---|
| CPEs | cpe:/o:redhat:enterprise_linux:8 cpe:/o:redhat:enterprise_linux:9 |
cpe:/a:redhat:enterprise_linux:10 cpe:/a:redhat:enterprise_linux:8 cpe:/a:redhat:enterprise_linux:9 |
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
| Type | Values Removed | Values Added |
|---|---|---|
| Description | A flaw was found in libslirp. When handling ICMP echo requests, the reply length is not updated to match the actual data received from the host. Under specific conditions where the normal ICMP socket is unavailable, this length mismatch causes the host's real IP address to be leaked to the guest in the echo reply, breaking the NAT isolation that user-mode networking is expected to provide. | |
| Title | Libslirp: libslirp: icmp echo reply length desynchronization leaks host ip to guest | |
| First Time appeared |
Redhat
Redhat enterprise Linux Redhat openshift |
|
| Weaknesses | CWE-200 | |
| CPEs | cpe:/a:redhat:openshift:4 cpe:/o:redhat:enterprise_linux:10 cpe:/o:redhat:enterprise_linux:8 cpe:/o:redhat:enterprise_linux:9 |
|
| Vendors & Products |
Redhat
Redhat enterprise Linux Redhat openshift |
|
| References |
| |
| Metrics |
threat_severity
|
cvssV3_1
|