Link following in RRWO File::Rotate::Simple
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- High
- Impact type
- —
- Confidentiality · integrity · availability
- None · Low · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA.
Summary
File::Rotate::Simple versions before 0.4.0 for Perl create the target of dangling symlinks when rotating files. When the file to be rotated is a symbolic link to a missing file, and the touch option is enabled, then the rotate method assumes that the file is absent (since the existence check is against the target), and does not rotate it. But it touches the file, which creates the target. An attacker that has the ability to create the symlink can use this to create an arbitrary file with permissions of the process rotating the files (which may be different from the process that normally writes to the log file that is being rotated). Note that the touch option is disabled by default.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
- Fix · CNA File::Rotate::Simple (RRWO) Fixed in 0.4.0
Timeline
- 2026-10-02 Threatist record created from CVE-2026-17435
References
More RRWO vulnerabilities
- TI-2026-13955 OS command injection in RRWO Catalyst::View::Wkhtmltopdf CVSS 3.1CRITICAL 9.8
- TI-2026-14395 Server-side request forgery in RRWO Plack::App::Prerender CVSS 3.1CRITICAL 9.1
- TI-2026-34943 Crypt::SaltedHash versions through 0.09 for Perl generate insecure random values for salts CVSS 3.1CRITICAL 9.1
- TI-2026-34345 Net::Statsd::Tiny versions before 0.3.8 for Perl allowed metric injections CVSS 3.1HIGH 8.2
- TI-2026-15909 Net::CIDR::Set versions before 0.23 for Perl allow memory exhaustion and malformed set… CVSS 3.1HIGH 7.5
- TI-2026-36790 Uncontrolled recursion in RRWO Net::CIDR::Set CVSS 3.1HIGH 7.5
Sources
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