Vulnerabilities > CVE-2001-0554 - Classic Buffer Overflow vulnerability in multiple products
Attack vector
NETWORK Attack complexity
LOW Privileges required
NONE Confidentiality impact
COMPLETE Integrity impact
COMPLETE Availability impact
COMPLETE Summary
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.
Vulnerable Configurations
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- Buffer Overflow via Environment Variables This attack pattern involves causing a buffer overflow through manipulation of environment variables. Once the attacker finds that they can modify an environment variable, they may try to overflow associated buffers. This attack leverages implicit trust often placed in environment variables.
- Overflow Buffers Buffer Overflow attacks target improper or missing bounds checking on buffer operations, typically triggered by input injected by an attacker. As a consequence, an attacker is able to write past the boundaries of allocated buffer regions in memory, causing a program crash or potentially redirection of execution as per the attackers' choice.
- Client-side Injection-induced Buffer Overflow This type of attack exploits a buffer overflow vulnerability in targeted client software through injection of malicious content from a custom-built hostile service.
- Filter Failure through Buffer Overflow In this attack, the idea is to cause an active filter to fail by causing an oversized transaction. An attacker may try to feed overly long input strings to the program in an attempt to overwhelm the filter (by causing a buffer overflow) and hoping that the filter does not fail securely (i.e. the user input is let into the system unfiltered).
- MIME Conversion An attacker exploits a weakness in the MIME conversion routine to cause a buffer overflow and gain control over the mail server machine. The MIME system is designed to allow various different information formats to be interpreted and sent via e-mail. Attack points exist when data are converted to MIME compatible format and back.
Exploit-Db
| description | Solaris 2.x/7.0/8,IRIX 6.5.x,OpenBSD 2.x,NetBSD 1.x,Debian 3,HP-UX 10 Telnetd Buffer Overflow. CVE-2001-0554. Remote exploit for unix platform |
| id | EDB-ID:21018 |
| last seen | 2016-02-02 |
| modified | 2001-07-18 |
| published | 2001-07-18 |
| reporter | Dvorak |
| source | https://www.exploit-db.com/download/21018/ |
| title | Solaris 2.x/7.0/8,IRIX 6.5.x,OpenBSD 2.x,NetBSD 1.x,Debian 3,HP-UX 10 Telnetd Buffer Overflow |
Nessus
NASL family Gentoo Local Security Checks NASL id GENTOO_GLSA-200410-03.NASL description The remote host is affected by the vulnerability described in GLSA-200410-03 (NetKit-telnetd: buffer overflows in telnet and telnetd) A possible buffer overflow exists in the parsing of option strings by the telnet daemon, where proper bounds checking is not applied when writing to a buffer. Additionaly, another possible buffer overflow has been found by Josh Martin in the handling of the environment variable HOME. Impact : A remote attacker sending a specially crafted options string to the telnet daemon could be able to run arbitrary code with the privileges of the user running the telnet daemon, usually root. Furthermore, an attacker could make use of an overlong HOME variable to cause a buffer overflow in the telnet client, potentially leading to the local execution of arbitrary code. Workaround : There is no known workaround at this time. last seen 2020-06-01 modified 2020-06-02 plugin id 15424 published 2004-10-06 reporter This script is Copyright (C) 2004-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/15424 title GLSA-200410-03 : NetKit-telnetd: buffer overflows in telnet and telnetd NASL family Mandriva Local Security Checks NASL id MANDRAKE_MDKSA-2001-068.NASL description A buffer overflow exists in telnet which could provide root access to local users. last seen 2020-06-01 modified 2020-06-02 plugin id 13883 published 2004-07-31 reporter This script is Copyright (C) 2004-2019 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/13883 title Mandrake Linux Security Advisory : telnet (MDKSA-2001:068) NASL family Debian Local Security Checks NASL id DEBIAN_DSA-075.NASL description The telnet daemon contained in the netkit-telnet-ssl_0.16.3-1 package in the last seen 2020-06-01 modified 2020-06-02 plugin id 14912 published 2004-09-29 reporter This script is Copyright (C) 2004-2019 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/14912 title Debian DSA-075-1 : netkit-telnet-ssl - remote exploit NASL family CISCO NASL id CSCDW19195.NASL description Some Cisco Catalyst switches, running certain CatOS based software releases, have a vulnerability wherein a buffer overflow in the telnet option handling can cause the telnet daemon to crash and result in a switch reload. This vulnerability can be exploited to initiate a denial of service (DoS) attack. This vulnerability is documented as Cisco bug ID CSCdw19195. last seen 2020-06-01 modified 2020-06-02 plugin id 10986 published 2002-06-05 reporter This script is (C) 2002-2018 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/10986 title Cisco CatOS Telnet Option Handling Overflow (CSCdw19195) NASL family Debian Local Security Checks NASL id DEBIAN_DSA-070.NASL description The netkit-telnet daemon contained in the telnetd package version 0.16-4potato1, which is shipped with the last seen 2020-06-01 modified 2020-06-02 plugin id 14907 published 2004-09-29 reporter This script is Copyright (C) 2004-2019 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/14907 title Debian DSA-070-1 : netkit-telnet - remote exploit NASL family Gain a shell remotely NASL id TESO_TELNET.NASL description The Telnet server does not return an expected number of replies when it receives a long sequence of last seen 2020-06-01 modified 2020-06-02 plugin id 10709 published 2001-07-24 reporter This script is Copyright (C) 2001-2018 Pavel Kankovsky source https://www.tenable.com/plugins/nessus/10709 title BSD Based telnetd telrcv Function Remote Command Execution NASL family Mandriva Local Security Checks NASL id MANDRAKE_MDKSA-2001-093.NASL description A buffer overflow exists in the telnet portion of Kerberos that could provide root access to local users. MDKSA-2001:068 provided a similar fix to the normal telnet packages, but the Kerberized equivalent was not updated previously. last seen 2020-06-01 modified 2020-06-02 plugin id 13906 published 2004-07-31 reporter This script is Copyright (C) 2004-2019 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/13906 title Mandrake Linux Security Advisory : krb5 (MDKSA-2001:093)
Redhat
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References
- http://www.securityfocus.com/archive/1/197804
- http://www.cert.org/advisories/CA-2001-21.html
- ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-01:49.telnetd.asc
- http://www.securityfocus.com/bid/3064
- http://online.securityfocus.com/archive/1/199496
- http://online.securityfocus.com/archive/1/203000
- http://online.securityfocus.com/archive/1/199541
- http://www.ciac.org/ciac/bulletins/l-131.shtml
- http://www.calderasystems.com/support/security/advisories/CSSA-2001-030.0.txt
- ftp://stage.caldera.com/pub/security/openserver/CSSA-2001-SCO.10/CSSA-2001-SCO.10.txt
- http://www.cisco.com/warp/public/707/catos-telrcv-vuln-pub.shtml
- http://ftp.support.compaq.com/patches/.new/html/SSRT0745U.shtml
- http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000413
- http://www.debian.org/security/2001/dsa-070
- http://www.debian.org/security/2001/dsa-075
- http://archives.neohapsis.com/archives/hp/2001-q4/0014.html
- http://online.securityfocus.com/advisories/3476
- http://www.linux-mandrake.com/en/security/2001/MDKSA-2001-068.php3
- ftp://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2001-012.txt.asc
- ftp://patches.sgi.com/support/free/security/advisories/20010801-01-P
- http://www.redhat.com/support/errata/RHSA-2001-099.html
- http://www.redhat.com/support/errata/RHSA-2001-100.html
- http://www.novell.com/linux/security/advisories/2001_029_nkitb_txt.html
- http://www.osvdb.org/809
- https://exchange.xforce.ibmcloud.com/vulnerabilities/6875