Two vulnerabilities tracked as CVE-2023-27350 and CVE-2023-27351 have been found in PaperCut, a print management software solution used by over 100 million users from 70,000 organizations. The most recent attacks on PaperCut servers are coming from the Clop and LockBit ransomware operations.
CVE-2023-27350, which has a critical CVSS score of 9.8, affects all versions of PaperCut MF or NG 8.0 or later. The vulnerability impacts both application and site servers across all operating system platforms. PaperCut’s advisory states that under certain circumstances the vulnerability allows for unauthenticated attackers to obtain Remote Code Execution (RCE) on a PaperCut ApplicationServer, without the need to log in.
The second vulnerability, CVE-2023-27351, has a high CVSS score of 8.2 and permits unauthenticated information disclosure on PaperCut MF or NG 15.0 or later, specifically on application servers, across all OS platforms. PaperCut’s advisory states that under certain circumstances an unauthenticated attacker could pull information about a user including usernames, email addresses, and full names. The attacker could also obtain hashed passwords for internal PaperCut-created users.
Earlier in the month, PaperCut confirmed that the vulnerabilities were being actively exploited. A few days after disclosure, a PoC for CVE-2023-27530 was released, which allowed attackers to breach servers using the exploits. Papercut has issued patches to address the vulnerabilities and recommends that all admins upgrade their servers to the latest version.
INDICATORS OF COMPROMISE (IoCs)