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Vulnerability record · CVE-2001-0554 · published 14 August 2001

CVE-2001-0554: Mit kerberos classic buffer overflow vulnerability

Mit · Kerberos

Buffer overflow in BSD-based telnetd telnet daemon on various operating systems allows remote attackers to execute arbitrary commands via a set of options including AYT (Are You There), which is not properly handled by the telrcv function.

10.0 CVSS 2.0 High EPSS 39% · top 1.5% CWE-120 · Classic buffer overflow
10.0CVSS 2.0 base score
39%EPSS exploitation probability, 30 days
NoNot in CISA KEV
11Affected product versions listed by NVD
50References, 4 tagged exploit
16 Jun 2026Last modified by NVD

Description

Buffer overflow in BSD-based telnetd telnet daemon on various operating systems allows remote attackers to execute arbitrary commands via a set of options including AYT (Are You There), which is not properly handled by the telrcv function.

AV:N/AC:L/Au:N/C:C/I:C/A:C

Affected products

11 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-01:49.telnetd.asc Broken LinkPatchVendor Advisory
ftp://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2001-012.txt.asc Broken Link
ftp://patches.sgi.com/support/free/security/advisories/20010801-01-P Broken Link
ftp://stage.caldera.com/pub/security/openserver/CSSA-2001-SCO.10/CSSA-2001-SCO.10.txt Broken Link
http://archives.neohapsis.com/archives/hp/2001-q4/0014.html Broken Link
http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000413 Broken Link
http://ftp.support.compaq.com/patches/.new/html/SSRT0745U.shtml Broken Link
http://online.securityfocus.com/advisories/3476 Broken LinkThird Party AdvisoryVDB Entry
http://online.securityfocus.com/archive/1/199496 Broken LinkThird Party AdvisoryVDB Entry
http://online.securityfocus.com/archive/1/199541 Broken LinkThird Party AdvisoryVDB Entry
http://online.securityfocus.com/archive/1/203000 Broken LinkThird Party AdvisoryVDB Entry
http://www.calderasystems.com/support/security/advisories/CSSA-2001-030.0.txt Broken Link
http://www.cert.org/advisories/CA-2001-21.html PatchThird Party AdvisoryUS Government Resource
http://www.ciac.org/ciac/bulletins/l-131.shtml Broken Link
http://www.cisco.com/warp/public/707/catos-telrcv-vuln-pub.shtml Third Party Advisory
http://www.debian.org/security/2001/dsa-070 Third Party Advisory
http://www.debian.org/security/2001/dsa-075 Third Party Advisory
http://www.linux-mandrake.com/en/security/2001/MDKSA-2001-068.php3 Broken Link
http://www.novell.com/linux/security/advisories/2001_029_nkitb_txt.html Broken Link
http://www.osvdb.org/809 Broken Link
http://www.redhat.com/support/errata/RHSA-2001-099.html Third Party Advisory
http://www.redhat.com/support/errata/RHSA-2001-100.html Third Party Advisory
http://www.securityfocus.com/archive/1/197804 ExploitThird Party AdvisoryVDB EntryVendor Advisory
http://www.securityfocus.com/bid/3064 ExploitPatchThird Party AdvisoryVDB EntryVendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/6875 Third Party AdvisoryVDB Entry
ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-01:49.telnetd.asc Broken LinkPatchVendor Advisory
ftp://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2001-012.txt.asc Broken Link
ftp://patches.sgi.com/support/free/security/advisories/20010801-01-P Broken Link
ftp://stage.caldera.com/pub/security/openserver/CSSA-2001-SCO.10/CSSA-2001-SCO.10.txt Broken Link
http://archives.neohapsis.com/archives/hp/2001-q4/0014.html Broken Link
http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000413 Broken Link
http://ftp.support.compaq.com/patches/.new/html/SSRT0745U.shtml Broken Link
http://online.securityfocus.com/advisories/3476 Broken LinkThird Party AdvisoryVDB Entry
http://online.securityfocus.com/archive/1/199496 Broken LinkThird Party AdvisoryVDB Entry
http://online.securityfocus.com/archive/1/199541 Broken LinkThird Party AdvisoryVDB Entry
http://online.securityfocus.com/archive/1/203000 Broken LinkThird Party AdvisoryVDB Entry
http://www.calderasystems.com/support/security/advisories/CSSA-2001-030.0.txt Broken Link
http://www.cert.org/advisories/CA-2001-21.html PatchThird Party AdvisoryUS Government Resource
http://www.ciac.org/ciac/bulletins/l-131.shtml Broken Link
http://www.cisco.com/warp/public/707/catos-telrcv-vuln-pub.shtml Third Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2001-0554), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.