Home/CVE/Cisco IOS 11.x and 12.x allows remote attackers to cause a denial of service by sending the ENVIRON option to the Telnet
CVE

CVE-2000-0268

Cisco IOS 11.x and 12.x allows remote attackers to cause a denial of service by sending the ENVIRON option to the Telnet

Cisco IOS 11.x and 12.x allows remote attackers to cause a denial of service by sending the ENVIRON option to the Telnet daemon before it is ready to accept it, which causes the system to reboot.

MEDIUM · CVSS 5 EPSS 0.00739
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  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
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Affected Products & Versions

12
cisco iosall versions
cisco accesspathall versions
cisco as5200all versions
cisco as5300all versions
cisco as5800all versions
cisco system controller 3640all versions
cisco voice gateway as5800all versions
cisco 3660 routerall versions
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Scoring & Timeline

5
MEDIUM · CVSS v2 (legacy) · cve@mitre.org
View on NVD
This CVE predates CVSS v3; the legacy v2 score is shown so triage still has a severity to work with.
v2 Vector
AV:N/AC:L/Au:N/C:N/I:N/A:P
Published to NVD20 Apr 2000 · 04:00 AM
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References & Sources

3
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://www.cisco.com/warp/public/707/iostelnetopt-pub.shtmlPatchVendor Advisory
http://www.osvdb.org/1289
http://www.securityfocus.com/bid/1123
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