Bug 641361 (CVE-2010-3430, CVE-2010-3431)

Summary: CVE-2010-3430 CVE-2010-3431 pam: pam_mail and pam_env incorrect privilege dropping
Product: [Other] Security Response Reporter: Tomas Hoger <thoger>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED NOTABUG QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: tmraz
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2010-12-22 15:45:16 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Bug Depends On:    
Bug Blocks: 641335    

Description Tomas Hoger 2010-10-08 14:16:04 UTC
The pam_mail and pam_env modules in Linux-PAM before 1.1.2 did not drop privileges before accessing users' files (CVE-2010-3435, see bug #641335).  Privilege dropping was added in 1.1.2, but with couple of issues pointed out by Solar Designer:


The code fails to switch fsgid/egid and groups (CVE-2010-3430) and does not check setfsuid() return value (CVE-2010-3431).  Fix using newly-introduced pam_modutil_drop_priv / pam_modutil_regain_priv was committed in upstream CVS and should be included in 1.1.3:

Comment 1 Tomas Hoger 2010-10-08 14:19:01 UTC
Linux-PAM 1.1.2 is currently only available in Fedora Rawhide.  Older PAM versions do to contain affected privilege dropping code and hence can not be affected by these issues.  The are affected by the original issue - CVE-2010-3435.


Not vulnerable. This issue did not affect the versions of pam as shipped with Red Hat Enterprise Linux 3, 4, 5, or 6.