The dissect_frame function in epan/dissectors/packet-frame.c in the frame metadissector in Wireshark 1.10.x before 1.10.8 interprets a negative integer as a length value even though it was intended to represent an error condition, which allows remote attackers to cause a denial of service (application crash) via a crafted packet.
The MITRE CVE dictionary describes this issue as:
Find out more about CVE-2014-4020 from the MITRE CVE dictionary dictionary and NIST NVD.
This issue does not affect the versions of wireshark as shipped with Red Hat Enterprise Linux 5 and 6. It does affect the versions of wireshark as shipped with Red Hat Enterprise Linux 7. The Red Hat Security Response Team has rated this issue as having Moderate security impact, a future update may address this flaw.
NOTE: The following CVSS v2 metrics and score provided are preliminary and subject to review.
| Base Score | 4.3 |
|---|---|
| Base Metrics | AV:N/AC:M/Au:N/C:N/I:N/A:P |
| Access Vector | Network |
| Access Complexity | Medium |
| Authentication | None |
| Confidentiality Impact | None |
| Integrity Impact | None |
| Availability Impact | Partial |
Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).
| Platform | Package | State |
|---|---|---|
| Red Hat Enterprise Linux 7 | wireshark | Fix deferred |
| Red Hat Enterprise Linux 6 | wireshark | Not affected |
| Red Hat Enterprise Linux 5 | wireshark | Not affected |
Vulmon