CVE-2000-0305Terminal Server Vulnerability
Windows 95, Windows 98, Windows 2000, Windows NT 4.0, and Terminal Server systems allow a remote attacker to cause a denial of service by sending a large number of identical fragmented IP packets, aka jolt2 or the "IP Fragment Reassembly" vulnerability.
Published May 19, 2000 · Updated Apr 15, 2026
Key Facts
Patch immediately- CVE-2000-0305 is a high-severity vulnerability (CVSS 7.8 v2) affecting Terminal Server (Microsoft), Beos, Windows 2000 (Microsoft) and 3 more products.
- It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
- EPSS estimates a 38% probability of exploitation in the next 30 days.
- No fixed version is listed yet; check the vendor advisory for mitigations.
- Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.
Scores
CVSS v2
7.8
AV:N/AC:L/Au:N/C:N/I:N/A:C
EPSS (30-day exploit likelihood)
38%
Higher than 98.5% of all scored CVEs
Exploit maturity
Proof of concept
ATLAS score
39/100
Publication score, see How it works
Exploitation Verdict
KEV listed
Not listed
Federal due date
None
No federal due date
Ransomware use
Not reported
Attributed actors
None named
Exploit & Defence Guidance
Exploit maturity
Proof of concept
Public exploit code
1
Proof-of-concept links
In-the-wild evidence
0
Reports of active use
Advisories And Exploit References
- advisory1236
- advisory20000519 jolt2 - Remote DoS against NT, W2K, 9x
Description
Windows 95, Windows 98, Windows 2000, Windows NT 4.0, and Terminal Server systems allow a remote attacker to cause a denial of service by sending a large number of identical fragmented IP packets, aka jolt2 or the "IP Fragment Reassembly" vulnerability.
Affected Products
6 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Terminal ServerMicrosoft | See advisory | n/a |
| BeosBe | 5.0 | n/a |
| Windows 2000Microsoft | See advisory | n/a |
| Windows 95Microsoft | See advisory | n/a |
| Windows 98Microsoft | See advisory | n/a |
Timeline
Publicly disclosed
May 19, 2000
Last updated
Apr 15, 2026
Weakness Type
- CWE-399
References
- advisory1236
- advisory20000519 jolt2 - Remote DoS against NT, W2K, 9x
- exploitExploitDB-214
- otherMS00-029
FAQ
Common Questions.
Windows 95, Windows 98, Windows 2000, Windows NT 4.0, and Terminal Server systems allow a remote attacker to cause a denial of service by sending a large number of identical fragmented IP packets, aka jolt2 or the "IP Fragment Reassembly" vulnerability.
Affected: Terminal Server (Microsoft); Beos versions 5.0; Windows 2000 (Microsoft), among others. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.
Is CVE-2000-0305 On Your Attack Surface?
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