{"id":57820,"date":"2025-07-06T11:40:01","date_gmt":"2025-07-06T11:40:01","guid":{"rendered":""},"modified":"2025-09-16T12:32:05","modified_gmt":"2025-09-16T18:32:05","slug":"cve-2025-32463-critical-privilege-escalation-vulnerability-in-sudo","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-32463-critical-privilege-escalation-vulnerability-in-sudo\/","title":{"rendered":"CVE-2025-32463: Critical Privilege Escalation Vulnerability in Sudo<\/strong>"},"content":{"rendered":"

Overview<\/strong><\/p>\n

CVE-2025-32463 is a critical vulnerability discovered in Sudo, a utility found in numerous Unix- and Linux-based systems that allows a system administrator to delegate limited root access to users. This flaw can enable local users to gain full root access to the system by exploiting the –chroot option. This is particularly concerning because of the pervasiveness of Sudo, its typical configuration to allow certain users to execute commands as other users, and the potential for an attacker to compromise an entire system if the vulnerability<\/a> is successfully exploited.<\/p>\n

Vulnerability Summary<\/strong><\/p>\n

CVE ID: CVE-2025-32463
\nSeverity: Critical (9.3 CVSS Score)
\nAttack Vector: Local
\nPrivileges Required: Low
\nUser Interaction: None
\nImpact: Potential system compromise or data leakage<\/a><\/p>\n

Affected Products<\/strong><\/p>\n

Product | Affected Versions<\/p>\n

Sudo | Before 1.9.17p1<\/p>\n

How the Exploit Works<\/strong><\/p>\n

The exploit takes advantage of a misconfiguration in the Sudo utility. Specifically, when the –chroot option is used, Sudo uses \/etc\/nsswitch.conf from a user-controlled directory. An attacker can create a malicious nsswitch.conf file in their directory, then use the –chroot option to make Sudo use their malicious nsswitch.conf file. This can allow the attacker to escalate their privileges<\/a> and gain root access to the system.<\/p>\n

Conceptual Example Code<\/strong><\/p>\n

Here’s a hypothetical command sequence that demonstrates how the vulnerability<\/a> might be exploited:<\/p>\n

# Attacker creates a malicious nsswitch.conf file in their directory\necho \"passwd: files\" > ~\/nsswitch.conf\n# Attacker uses the --chroot option to make Sudo use their malicious nsswitch.conf file\nsudo --chroot . \/bin\/bash<\/code><\/pre>\n
In this example, the attacker creates a malicious nsswitch.conf file that specifies that user authentication<\/a> should be done using only local files, not network-based services. They then run a command with Sudo using the –chroot option to make Sudo use their malicious nsswitch.conf file. This effectively grants them root access<\/a> to the system.<\/p>\n
How to Mitigate<\/strong><\/p>\n
To mitigate this vulnerability, users should apply the patch provided by the vendor, which in this case is Sudo version 1.9.17p1 or later. Alternatively, users can use a Web Application<\/a> Firewall (WAF) or an Intrusion Detection System (IDS) as a temporary mitigation until the patch can be applied. However, it’s important to note that while a WAF or IDS can help detect and prevent some exploit attempts, they are not sufficient to fully protect against this vulnerability<\/a>. Users should prioritize applying the vendor\u2019s patch as soon as possible.<\/p>\n","protected":false},"excerpt":{"rendered":"
Overview CVE-2025-32463 is a critical vulnerability discovered in Sudo, a utility found in numerous Unix- and Linux-based systems that allows a system administrator to delegate limited root access to users. This flaw can enable local users to gain full root access to the system by exploiting the –chroot option. This is particularly concerning because of […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"footnotes":""},"categories":[1],"tags":[],"vendor":[88],"product":[],"attack_vector":[76],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-57820","post","type-post","status-publish","format-standard","hentry","category-uncategorized","vendor-linux","attack_vector-privilege-escalation"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t