CVE-2007-4321
fail2ban 0.8 and earlier does not properly parse sshd log files, which allows remote attackers to add arbitrary hosts to the /etc/hosts.deny file and cause a denial of service by adding arbitrary IP
02 Description
fail2ban 0.8 and earlier does not properly parse sshd log files, which allows remote attackers to add arbitrary hosts to the /etc/hosts.deny file and cause a denial of service by adding arbitrary IP
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 5.74% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 92.8% of scored records. A rank, not a probability.
- NVD base score
- The NVD has published no score for this record
- NVD CVSS vector
- No NVD score to derive
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-16.
- Red Hat severity
- No Red Hat rating. Red Hat rates the CVEs that affect its products.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2007-08-14 00:00Z19 YR AGO
- Last updated
- 2024-08-07 14:53Z2 YR AGO
- Reserved
- 2007-08-13
- Assigning CNA
- mitre
- Record state
- PUBLISHED
- Severity
- Not rated by the issuing CNA
- CNA CVSS vector
- Not published by the issuing CNA
- Weaknesses
- No CWE assigned
- Data version
- 5.1
- Document digest
- 66d6bf76882d4b3fc11392d28f01b42949a841dae847f40ed0fa58f7a1d22d70
05 Affected products
06 References
- www.debian.orgDSA-1456http://www.debian.org/security/2008/dsa-1456
- secunia.com23237http://secunia.com/advisories/23237
- osvdb.org42484http://osvdb.org/42484
- www.securityfocus.com25117http://www.securityfocus.com/bid/25117
- secunia.com28374http://secunia.com/advisories/28374
- bugs.gentoo.orghttp://bugs.gentoo.org/show_bug.cgi?id=181214
- security.gentoo.orgGLSA-200707-13http://security.gentoo.org/glsa/glsa-200707-13.xml
- www.ossec.nethttp://www.ossec.net/en/attacking-loganalysis.html
07 Fixed in
Debian 12
- fail2ban Fixed in 0.8.0-4
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- fail2ban Fixed in 0.8.0-4
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- fail2ban Fixed in 0.8.0-4
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.