CVE-2005-1021

Published: May 2, 2005Modified: Apr 16, 2026

7.1

Vector

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

Exploitability: 8.6 / Impact: 6.9

Source: NVD

Description

Memory leak in Secure Shell (SSH) in Cisco IOS 12.0 through 12.3, when authenticating against a TACACS+ server, allows remote attackers to cause a denial of service (memory consumption) via an incorrect username or password.

Affected (93)

Products: Cisco: Ios

Cisco

1 product

Ios

Configuration A

93 vulnerable

Vulnerable Software	Affected Versions
Cisco Ios	Version 12.0s
Cisco Ios	Version 12.0sx
Cisco Ios	Version 12.1ax
Cisco Ios	Version 12.1az
Cisco Ios	Version 12.1db
Cisco Ios	Version 12.1dc
Cisco Ios	Version 12.1e
Cisco Ios	Version 12.1ea
Cisco Ios	Version 12.1eb
Cisco Ios	Version 12.1ec
Cisco Ios	Version 12.1eu
Cisco Ios	Version 12.1ew
Cisco Ios	Version 12.1ex
Cisco Ios	Version 12.1t
Cisco Ios	Version 12.1xd
Cisco Ios	Version 12.1xe
Cisco Ios	Version 12.1xf
Cisco Ios	Version 12.1xg
Cisco Ios	Version 12.1xh
Cisco Ios	Version 12.1xi
Cisco Ios	Version 12.1xl
Cisco Ios	Version 12.1xm
Cisco Ios	Version 12.1xp
Cisco Ios	Version 12.1xq
Cisco Ios	Version 12.1xr
Cisco Ios	Version 12.1xt
Cisco Ios	Version 12.1xu
Cisco Ios	Version 12.1xv
Cisco Ios	Version 12.1ya
Cisco Ios	Version 12.1yb
Cisco Ios	Version 12.1yc
Cisco Ios	Version 12.1yd
Cisco Ios	Version 12.1ye
Cisco Ios	Version 12.1yf
Cisco Ios	Version 12.1yh
Cisco Ios	Version 12.1yi
Cisco Ios	Version 12.2
Cisco Ios	Version 12.2b
Cisco Ios	Version 12.2dd
Cisco Ios	Version 12.2dx
Cisco Ios	Version 12.2eu
Cisco Ios	Version 12.2ew
Cisco Ios	Version 12.2ewa
Cisco Ios	Version 12.2ex
Cisco Ios	Version 12.2s
Cisco Ios	Version 12.2se
Cisco Ios	Version 12.2sea
Cisco Ios	Version 12.2seb
Cisco Ios	Version 12.2su
Cisco Ios	Version 12.2sv
Cisco Ios	Version 12.2sx
Cisco Ios	Version 12.2sxa
Cisco Ios	Version 12.2sxb
Cisco Ios	Version 12.2sxd
Cisco Ios	Version 12.2sy
Cisco Ios	Version 12.2sz
Cisco Ios	Version 12.2t
Cisco Ios	Version 12.2xa
Cisco Ios	Version 12.2xc
Cisco Ios	Version 12.2xf
Cisco Ios	Version 12.2xn
Cisco Ios	Version 12.2xs
Cisco Ios	Version 12.2ye
Cisco Ios	Version 12.2yk
Cisco Ios	Version 12.2yo
Cisco Ios	Version 12.2yx
Cisco Ios	Version 12.2yz
Cisco Ios	Version 12.2za
Cisco Ios	Version 12.3t
Cisco Ios	Version 12.3xd
Cisco Ios	Version 12.3xe
Cisco Ios	Version 12.3xf
Cisco Ios	Version 12.3xg
Cisco Ios	Version 12.3xh
Cisco Ios	Version 12.3xi
Cisco Ios	Version 12.3xj
Cisco Ios	Version 12.3xk
Cisco Ios	Version 12.3xl
Cisco Ios	Version 12.3xm
Cisco Ios	Version 12.3xq
Cisco Ios	Version 12.3xr
Cisco Ios	Version 12.3xs
Cisco Ios	Version 12.3xu
Cisco Ios	Version 12.3xw
Cisco Ios	Version 12.3xx
Cisco Ios	Version 12.3xy
Cisco Ios	Version 12.3ya
Cisco Ios	Version 12.3yd
Cisco Ios	Version 12.3yf
Cisco Ios	Version 12.3yg
Cisco Ios	Version 12.3yh
Cisco Ios	Version 12.3yj
Cisco Ios	Version 12.3yk