Bug 2573262 (CVE-2026-129119)

Summary: CVE-2026-129119 ckermit: ckermit: Unauthorized file modification via RESEND transfer collision protection bypass
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedKeywords: Security
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OS: Linux   
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A flaw was found in C-Kermit. A remote attacker acting as a sender can bypass file collision protection by marking an incoming file transfer as a resend operation. This issue causes the application to append incoming data to existing files on the recipient system without prompting for confirmation, allowing the attacker to modify critical files such as shell startup scripts.
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Description OSIDB Bzimport 2026-11-13 16:32:55 UTC 
C-Kermit from 6.0.192 before 11.1.515 contains a file collision protection bypass that allows malicious senders to append data to existing files by marking transfers as RESEND. The gattr() function in ckcfn3.c clears the REJECT discard flag and switches to APPEND without a RECEIVE CONFIRM prompt, letting attackers modify files such as shell startup files.