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CWE-120

4,201 CVEs • Abstraction: Base • Likelihood of Exploit: High

Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow.

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CVEs (4,201)

CVE
VENDORS
PRODUCTS
UPDATED
PUBLISHED
CVSS
1Wireless Tools Project
1Wireless Tools
Apr 16, 2026
Dec 15, 2003
N/A· v4
N/A· v3
7.2 HIGH· v2
Buffer overflow in iwconfig, when installed setuid, allows local users to execute arbitrary code via a long OUT environment variable.
1Terascript
1Wintango Application Server
Apr 16, 2026
Aug 27, 2003
N/A· v4
N/A· v3
7.5 HIGH· v2
Buffer overflow in WiTango Application Server and Tango 2000 allows remote attackers to execute arbitrary code via a long cookie to Witango_UserReference.
3Debian
Falconseye ProjectNethack
3Debian Linux
FalconseyeNethack
Apr 16, 2026
Jun 9, 2003
N/A· v4
N/A· v3
4.6 MEDIUM· v2
Buffer overflow in (1) nethack 3.4.0 and earlier, and (2) falconseye 1.9.3 and earlier, which is based on nethack, allows local users to gain privileges via a long -s command line option.
7Gentoo
HpNetbsd+4 more
9Alphaserver Sc
BsdosHp Ux+6 more
Apr 16, 2026
Mar 7, 2003
N/A· v4
N/A· v3
10.0 HIGH· v2
Buffer overflow in Sendmail 5.79 to 8.12.7 allows remote attackers to execute arbitrary code via certain formatted address fields, related to sender and recipient header comments as processed by the crackaddr function of...Show more
Buffer overflow in Sendmail 5.79 to 8.12.7 allows remote attackers to execute arbitrary code via certain formatted address fields, related to sender and recipient header comments as processed by the crackaddr function of headers.c.Show less
1Oracle
1Mysql
Apr 16, 2026
Oct 11, 2002
N/A· v4
7.8 HIGH· v3
4.6 MEDIUM· v2
Buffer overflow in MySQL daemon (mysqld) before 3.23.50, and 4.0 beta before 4.02, on the Win32 platform, allows local users to execute arbitrary code via a long "datadir" parameter in the my.ini initialization file, who...Show more
Buffer overflow in MySQL daemon (mysqld) before 3.23.50, and 4.0 beta before 4.02, on the Win32 platform, allows local users to execute arbitrary code via a long "datadir" parameter in the my.ini initialization file, whose permissions on Windows allow Full Control to the Everyone group.Show less
1Microsoft
1Exchange Server
Apr 16, 2026
Aug 12, 2002
N/A· v4
N/A· v3
7.5 HIGH· v2
Buffer overflow in Internet Mail Connector (IMC) for Microsoft Exchange Server 5.5 allows remote attackers to execute arbitrary code via an EHLO request from a system with a long name as obtained through a reverse DNS lo...Show more
Buffer overflow in Internet Mail Connector (IMC) for Microsoft Exchange Server 5.5 allows remote attackers to execute arbitrary code via an EHLO request from a system with a long name as obtained through a reverse DNS lookup, which triggers the overflow in IMC's hello response.Show less
5Debian
FreebsdGnu+2 more
5Debian Linux
FreebsdLinux+2 more
Apr 16, 2026
Mar 8, 2002
N/A· v4
N/A· v3
7.2 HIGH· v2
Buffer overflow in ncurses 5.0, and the ncurses4 compatibility package as used in Red Hat Linux, allows local users to gain privileges, related to "routines for moving the physical cursor and scrolling."
9Debian
FreebsdIbm+6 more
11Aix
Debian LinuxFreebsd+8 more
Apr 16, 2026
Aug 14, 2001
N/A· v4
N/A· v3
10.0 HIGH· v2
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 t...Show more
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.Show less
1Mit
1Kerberos 5
Apr 16, 2026
May 16, 2001
N/A· v4
N/A· v3
7.5 HIGH· v2
Buffer overflow in MIT Kerberos 5 (krb5) 1.2.2 and earlier allows remote attackers to cause a denial of service and possibly execute arbitrary code via base-64 encoded data, which is not properly handled when the radix_e...Show more
Buffer overflow in MIT Kerberos 5 (krb5) 1.2.2 and earlier allows remote attackers to cause a denial of service and possibly execute arbitrary code via base-64 encoded data, which is not properly handled when the radix_encode function processes file glob output from the ftpglob function.Show less
1Andynorman
1Gnuserv
Apr 16, 2026
May 3, 2001
N/A· v4
N/A· v3
10.0 HIGH· v2
gnuserv before 3.12, as shipped with XEmacs, does not properly check the specified length of an X Windows MIT-MAGIC-COOKIE cookie, which allows remote attackers to execute arbitrary commands via a buffer overflow, or bru...Show more
gnuserv before 3.12, as shipped with XEmacs, does not properly check the specified length of an X Windows MIT-MAGIC-COOKIE cookie, which allows remote attackers to execute arbitrary commands via a buffer overflow, or brute force authentication by using a short cookie length.Show less
1Microsoft
1Exchange Server
Apr 16, 2026
Mar 12, 2001
N/A· v4
N/A· v3
5.0 MEDIUM· v2
Buffer overflow in Internet Mail Service (IMS) for Microsoft Exchange 5.5 and 5.0 allows remote attackers to conduct a denial of service via AUTH or AUTHINFO commands.
1Aol
1Aim
Apr 16, 2026
Jan 9, 2001
N/A· v4
N/A· v3
7.5 HIGH· v2
Buffer overflow in AOL Instant Messenger (AIM) before 4.3.2229 allows remote attackers to execute arbitrary commands via a "buddyicon" command with a long "src" argument.
3Cygnus Network Security Project
Kerbnet ProjectMit
4Cygnus Network Security
KerberosKerberos 5+1 more
Apr 16, 2026
Jun 9, 2000
N/A· v4
N/A· v3
5.0 MEDIUM· v2
Buffer overflow in Kerberos 4 KDC program allows remote attackers to cause a denial of service via the e_msg variable in the kerb_err_reply function.
3Cygnus Network Security Project
Kerbnet ProjectMit
4Cygnus Network Security
KerberosKerberos 5+1 more
Apr 16, 2026
Jun 9, 2000
N/A· v4
N/A· v3
5.0 MEDIUM· v2
Buffer overflow in Kerberos 4 KDC program allows remote attackers to cause a denial of service via the localrealm variable in the process_v4 function.
3Cygnus Network Security Project
Kerbnet ProjectMit
4Cygnus Network Security
KerberosKerberos 5+1 more
Apr 16, 2026
Jun 9, 2000
N/A· v4
N/A· v3
5.0 MEDIUM· v2
Buffer overflow in Kerberos 4 KDC program allows remote attackers to cause a denial of service via the lastrealm variable in the set_tgtkey function.
1Ibm
1Aix
Apr 16, 2026
Jan 27, 2000
N/A· v4
N/A· v3
7.2 HIGH· v2
Buffer overflow in portmir for AIX 4.3.0 allows local users to corrupt lock files and gain root privileges via the echo_error routine.
1Apache
1Http Server
Apr 16, 2026
Jun 6, 1999
N/A· v4
N/A· v3
10.0 HIGH· v2
Multiple buffer overflows in smbvalid/smbval SMB authentication library, as used in Apache::AuthenSmb and possibly other modules, allows remote attackers to execute arbitrary commands via (1) a long username, (2) a long...Show more
Multiple buffer overflows in smbvalid/smbval SMB authentication library, as used in Apache::AuthenSmb and possibly other modules, allows remote attackers to execute arbitrary commands via (1) a long username, (2) a long password, and (3) other unspecified methods.Show less
1Microsoft
1Exchange Server
Apr 16, 2026
Dec 1, 1998
N/A· v4
N/A· v3
10.0 HIGH· v2
The LDAP bind function in Exchange 5.5 has a buffer overflow that allows a remote attacker to conduct a denial of service or execute commands.
2Ibm
Microsoft
2Exchange Server
Lotus Domino Mail Server
Apr 16, 2026
Jan 1, 1998
N/A· v4
N/A· v3
7.5 HIGH· v2
Denial of service to NT mail servers including Ipswitch, Mdaemon, and Exchange through a buffer overflow in the SMTP HELO command.
7Bsdi
Data GeneralDebian+4 more
8Aix
Bsd OsDebian Linux+5 more
Apr 16, 2026
Apr 26, 1997
N/A· v4
8.4 HIGH· v3
7.2 HIGH· v2
Buffer overflow in xlock program allows local users to execute commands as root.