Debian/Ubuntu Cron Symlink Validation Flaw Lets Local Users Bypass Security Restrictions
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SecurityTracker Alert ID: 1038651 |
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SecurityTracker URL: http://securitytracker.com/id/1038651
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CVE Reference:
CVE-2017-9525
(Links to External Site)
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Date: Jun 9 2017
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Impact:
Root access via local system
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Vendor Confirmed: Yes
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Version(s): 3.0pl1-128 and prior on Debian; 3.0pl1-128ubuntu2 and prior on Ubuntu
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Description:
A vulnerability was reported in Cron on Debian/Ubuntu. A local user can bypass security restrictions.
A local user can with crontab group privileges can conduct a symlink attack to exploit a flaw in the postinst maintainer script to bypass crontab privilege separation controls and gain root privileges on the target system.
The original advisory is available at:
http://www.openwall.com/lists/oss-security/2017/06/08/3
Solar Designer reported this vulnerability.
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Impact:
A local user can bypass security controls on the target system.
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Solution:
No solution was available at the time of this entry.
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Cause:
Access control error
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Underlying OS: Linux (Debian), Linux (Ubuntu)
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Message History:
None.
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Source Message Contents
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[Original Message Not Available for Viewing]
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