SB2025062110 - Arch Linux update for sslh
Published: June 21, 2025
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 3 vulnerabilities.
1) Allocation of Resources Without Limits or Throttling (CVE-ID: CVE-2025-46807)
CWE-ID: CWE-770 - Allocation of Resources Without Limits or Throttling
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a file descriptor exhaustion in sslh-select.c and sslh-ev.c. A remote attacker can send specially crafted UDP packets to the server and perform a denial of service (DoS) attack.
2) Use of out-of-range pointer offset (CVE-ID: CVE-2025-46806)
CWE-ID: CWE-823 - Use of Out-of-range Pointer Offset
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to memory handling in is_openvpn_protocol() function in probe.c. A remote attacker can send specially crafted UDP packets to the affected server and perform a denial of service (DoS) attack.
3) Input validation error (CVE-ID: N/A)
CWE-ID: CWE-20 - Improper input validation
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to perform a denial of service attack.
The vulnerability exists due to insufficient validation of undefined syslog data. A local user with ability to generate syslog events can potentially crash the application.
Remediation
Install update from vendor's website.