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CVE-2007-1856

13
FAUCET Score

CVE-2007-1856 describes a local denial-of-service vulnerability affecting Vixie Cron on Gentoo Linux due to insecure file permissions. An attacker can exploit this by creating hard links, causing cron to fail its st_nlink check in database.c and cease operation. This vulnerability has a low severity CVSS score of 2.1, indicating a local attack with low complexity and a partial impact on availability. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 4.1CPE matchmatch criteria
cpe:2.3:a:paul_vixie:vixie_cron:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

2.1LOW

AV:L/AC:L/Au:N/C:N/I:N/A:P

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Exploitability Score
3.9
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
0.38%
Probability of exploitation in next 30 days
EPSS Percentile
30.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0038 is in the 48th percentile among its peer group of 2,096 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.6 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 3Fixed in: vixie-cron-0:4.1-19.EL3
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: vixie-cron-4:4.1-47.EL4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: vixie-cron-4:4.1-70.el5
View patch

Vendor Advisories (1)

redhatCVE-2007-1856Moderate

crontab denial of service

Apr 10, 2007

References

lists.grok.org.uk / pipermail/full-disclosure/2007-September/065902.html
rhn.redhat.com / errata/RHSA-2007-0345.html
secunia.com / advisories/24905
secunia.com / advisories/24995
secunia.com / advisories/25321
secunia.com / advisories/25723
secunia.com / advisories/26909
secunia.com / advisories/27706
secunia.com / advisories/27886
security.gentoo.org / glsa/glsa-200704-11.xml
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11463
support.avaya.com / elmodocs2/security/ASA-2007-261.htm
mandriva.com / security/advisories
novell.com / linux/security/advisories/2007_007_suse.html
securityfocus.com / bid/23520
securitytracker.com / id
vupen.com / english/advisories/2007/3229