Published:2016/05/27 Last Updated:2016/05/27
JVN#87859762
H2O use-after-free vulnerability
Overview
H2O contains a use-after-free vulnerability.
Products Affected
- H2O version 1.7.2 and earlier
Description
H2O is an open source web server software. H2O contains a use-after-free vulnerability.
Impact
An attacker may cause a denial-of-service (DoS) condition by sending a specially crafted packet.
Solution
Update the Software
Update to the latest version according to the information provided by the developer.
Vendor Status
| Vendor | Link |
| Kazuho Oku | fix use after free on premature connection close (CVE-2016-4817) #920 |
References
JPCERT/CC Addendum
Vulnerability Analysis by JPCERT/CC
CVSS v3
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Base Score:
5.3
| Attack Vector(AV) | Physical (P) | Local (L) | Adjacent (A) | Network (N) |
|---|---|---|---|---|
| Attack Complexity(AC) | High (H) | Low (L) | ||
| Privileges Required(PR) | High (H) | Low (L) | None (N) | |
| User Interaction(UI) | Required (R) | None (N) | ||
| Scope(S) | Unchanged (U) | Changed (C) | ||
| Confidentiality Impact(C) | None (N) | Low (L) | High (H) | |
| Integrity Impact(I) | None (N) | Low (L) | High (H) | |
| Availability Impact(A) | None (N) | Low (L) | High (H) |
CVSS v2
AV:N/AC:L/Au:N/C:N/I:N/A:P
Base Score:
5.0
| Access Vector(AV) | Local (L) | Adjacent Network (A) | Network (N) |
|---|---|---|---|
| Access Complexity(AC) | High (H) | Medium (M) | Low (L) |
| Authentication(Au) | Multiple (M) | Single (S) | None (N) |
| Confidentiality Impact(C) | None (N) | Partial (P) | Complete (C) |
| Integrity Impact(I) | None (N) | Partial (P) | Complete (C) |
| Availability Impact(A) | None (N) | Partial (P) | Complete (C) |
Credit
Kazuho Oku reported this vulnerability to IPA to notify users of its solution through JVN. JPCERT/CC and Kazuho Oku coordinated under the Information Security Early Warning Partnership.
Other Information
| JPCERT Alert |
|
| JPCERT Reports |
|
| CERT Advisory |
|
| CPNI Advisory |
|
| TRnotes |
|
| CVE |
CVE-2016-4817 |
| JVN iPedia |
JVNDB-2016-000091 |