Wireshark: Loop with Unreachable Exit Condition
CVE-2022-0586 is a high-severity loop with unreachable exit condition vulnerability in Wireshark from Wireshark Foundation, with a CVSS 3.1 base score of 7.5 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. Affected Wireshark versions: >=3.6.0, <3.6.2; >=3.4.0, <3.4.12. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 2% chance of exploitation within 30 days, higher than 81% of scored CVEs.
High severity with no evidence of exploitation so far.
What to do
- Check which version of Wireshark you run against the affected versions below, and install the vendor's latest release.
- Read the advisory on wireshark.org for workarounds and exact fixed builds.
- Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Wireshark Foundation | Wireshark | >=3.6.0, <3.6.2; >=3.4.0, <3.4.12 | Not stated |
| Fedora Project | Fedora | 34; 35 | Not stated |
| Debian | Debian Linux | 9.0 | Not stated |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- NoneNo account or login is needed.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- NoneNo data is disclosed.
- Integrity
- NoneNothing can be modified.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 6.3 | Medium | CNA (gitlab.com) |
| CVSS 3.1 | 7.5 | High | NVD |
| CVSS 2.0 | 7.8 | High | NVD |
Official description
Infinite loop in RTMPT protocol dissector in Wireshark 3.6.0 to 3.6.1 and 3.4.0 to 3.4.11 allows denial of service via packet injection or crafted capture file
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Loop with Unreachable Exit Condition
The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop.
More Loop with Unreachable Exit Condition vulnerabilities (CWE-835)
Timeline
- CVE record published.
- Record last changed materially (score, affected products, status or references).
References
Advisories
- wireshark.org/security/wnpa-sec-2022-01.htmlIssue Tracking
Third-party and government advisories
- gitlab.com/gitlab-org/cves/-/blob/master/2022/CVE-2022-0586.jsonThird Party Advisory
- lists.debian.org/debian-lts-announce/2022/03/msg00041.htmlMailing List, Third Party Advisory
- security.gentoo.org/glsa/202210-04Third Party Advisory
Technical write-ups (may include proof of concept)
- gitlab.com/wireshark/wireshark/-/issues/17813Exploit, Issue Tracking, Third Party Advisory
Other references
Recent Loop with Unreachable Exit Condition vulnerabilities
- 7.5 High severity
- 7.5 High severity
- 7.5 High severity
Spotted an error? Tell us.