Actively exploited · Published Feb 13, 2005 · Assigned by mitre

CVE-2004-1464

Medium 5.9 Exploited

In plain English

A medium-severity uncontrolled resource consumption in IOS from Cisco. Attackers are actively exploiting it in the wild (listed by CISA on May 19, 2023). The chance it is exploited in the next 30 days is estimated at 4.8% (higher than 92% of all known vulnerabilities). Apply updates per vendor instructions.

Severity (CVSS 3.1)5.9Medium

Exploit odds (30 days)4.8%top 8.0% of all CVEs

Exploited in the wildYesCISA KEV since May 19, 2023

Attack toolingNoneno public tooling known

CISA guidance

Apply updates per vendor instructions.

Federal agencies must remediate by Jun 9, 2023.

Official description

Cisco IOS 12.2(15) and earlier allows remote attackers to cause a denial of service (refused VTY (virtual terminal) connections), via a crafted TCP connection to the Telnet or reverse Telnet port.

Affected products (as reported)

Vendor	Product	Versions
n/a	n/a	n/a

Weakness: CWE-400 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

References

cisco-ios-telnet-dos(17131) vdb-entry, x_refsource_XF
1011079 vdb-entry, x_refsource_SECTRACK
VU#384230 third-party-advisory, x_refsource_CERT-VN
12395 third-party-advisory, x_refsource_SECUNIA
20040827 Cisco Telnet Denial of Service Vulnerability vendor-advisory, x_refsource_CISCO
11060 vdb-entry, x_refsource_BID
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2004-1464 government-resource