CVE-2005-1021 describes a memory leak vulnerability in Cisco IOS versions 12.0 through 12.3, specifically within the Secure Shell (SSH) authentication process when using a TACACS+ server. An attacker can exploit this by repeatedly attempting to authenticate with incorrect credentials, leading to memory consumption and a denial of service. The vulnerability has a CVSS score of 7.1, indicating high severity due to its network-based attack vector and complete availability impact. While requiring medium attack complexity, it allows unauthenticated attackers to disrupt service. There is no evidence of active exploitation, and no public exploit code is available in Metasploit, Nuclei, or ExploitDB. The CVE has received minimal community discussion or media coverage, suggesting low public awareness and a lack of widespread attention.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
12.0sCPE matchmatch criteria | cpe:2.3:o:cisco:ios:12.0s:*:*:*:*:*:*:* | ||
12.0sxCPE matchmatch criteria | cpe:2.3:o:cisco:ios:12.0sx:*:*:*:*:*:*:* | ||
12.1axCPE matchmatch criteria | cpe:2.3:o:cisco:ios:12.1ax:*:*:*:*:*:*:* | ||
12.1azCPE matchmatch criteria | cpe:2.3:o:cisco:ios:12.1az:*:*:*:*:*:*:* | ||
12.1dbCPE matchmatch criteria | cpe:2.3:o:cisco:ios:12.1db:*:*:*:*:*:*:* |
CVSS version used by this source: 2.0
AV:N/AC:M/Au:N/C:N/I:N/A:C
No social media mentions found for this CVE.
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.