| CVE-2019-12522 | Date: (C)2020-04-16 (M)2023-12-22 |
An issue was discovered in Squid through 4.7. When Squid is run as root, it spawns its child processes as a lesser user, by default the user nobody. This is done via the leave_suid call. leave_suid leaves the Saved UID as 0. This makes it trivial for an attacker who has compromised the child process to escalate their privileges back to root.
CVSS Score and Metrics +CVSS Score and Metrics -| CVSS V3 Severity: | CVSS V2 Severity: |
| CVSS Score : 4.5 | CVSS Score : 4.4 |
| Exploit Score: 1.0 | Exploit Score: 3.4 |
| Impact Score: 3.4 | Impact Score: 6.4 |
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| CVSS V3 Metrics: | CVSS V2 Metrics: |
| Attack Vector: LOCAL | Access Vector: LOCAL |
| Attack Complexity: HIGH | Access Complexity: MEDIUM |
| Privileges Required: LOW | Authentication: NONE |
| User Interaction: NONE | Confidentiality: PARTIAL |
| Scope: UNCHANGED | Integrity: PARTIAL |
| Confidentiality: LOW | Availability: PARTIAL |
| Integrity: LOW | |
| Availability: LOW | |
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