GNU nano before 2.2.4 does not verify whether a file has been changed before it is overwritten in a file-save operation, which allows local user-assisted attackers to overwrite arbitrary files via a symlink attack on an attacker-owned file that is being edited by the victim.
CVSS Severity (version 2.0):
Impact Subscore: 2.9
Exploitability Subscore: 3.4
CVSS Version 2 Metrics:
Access Vector: Locally exploitable; Victim must voluntarily interact with attack mechanism
Access Complexity: Medium
Authentication: Not required to exploit
Impact Type: Allows unauthorized modification
Official Statement from Red Hat (04/16/2010)
Red Hat is aware of this issue and is tracking it via the following bug: https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=CVE-2010-1160
The Red Hat Security Response Team has rated this issue as having low security impact, a future update may address this flaw.
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[oss-security] 20100414 CVE request: GNU nano (minor)
[Nano-devel] 20100407 New prerelease for security tweaks