BSD Securelevels settimeofday() security restriction bypass
| bsd-securelevel-settimeofday-bypass (24036) |  Low Risk |
Description:
The implementation of Securelevels in NetBSD and Linux kernel could allow a local attacker to bypass Securelevel restrictions, caused by an integer overflow vulnerability in the settimeofday() function. A local attacker could exploit this vulnerability to set the kernel time backwards, which could lead to system instability.
*CVSS:
| Base Score: | 4.9 |
| Access Vector: | Local |
| Access Complexity: | Low |
| Authentication: | Not Required |
| Confidentiality Impact: | Partial |
| Integrity Impact: | Partial |
| Availability Impact: | Partial |
| Temporal Score: | 3.6 |
| Exploitability: | Unproven |
| Remediation Level: | Official-Fix |
| Report Confidence: | Confirmed |
Consequences:
Bypass Security
Remedy:
For NetBSD:
Refer to NetBSD Security Advisory 2006-002 for patch or upgrade information. See References.
References:
- Full-Disclosure Mailing List, Mon Jan 09 2006 - 06:30:11 CST: Time modification flaw in BSD securelevels on NetBSD and Linux.
- NetBSD Security Advisory 2006-002: settimeofday() time wrap.
- BID-16170: BSD SecureLevel Time Setting Security Restriction Bypass Vulnerability
- CVE-2005-4352: The securelevels implementation in NetBSD 2.1 and earlier, and Linux 2.6.15 and earlier, allows local users to bypass time setting restrictions and set the clock backwards by setting the clock ahead to the maximum unixtime value (19 Jan 2038), which then wraps around to the minimum value (13 Dec 1901), which can then be set ahead to the desired time, aka settimeofday() time wrap.
- SECTRACK ID: 1015454: NetBSD settimeofday() Lets Certain Local Users Set the Time Backwards
Platforms Affected:
- Linux Linux Kernel 2.6.14.1
- Linux Kernel 2.6.0 test3
- Linux Kernel 2.6.0 test1
- Linux Kernel 2.6.0 test10
- Linux Kernel 2.6.0 test11
- Linux Kernel 2.6.0 test2
- Linux Kernel 2.6.0 test9-cvs
- Linux Kernel 2.6.0 test4
- Linux Kernel 2.6.0 test5
- Linux Kernel 2.6.0 test6
- Linux Kernel 2.6.0 test7
- Linux Kernel 2.6.0 test8
- Linux Kernel 2.6.0 test9
- Linux Kernel 2.6.0
- Linux Kernel 2.6.1 rc1
- Linux Kernel 2.6.1 rc2
- Linux Kernel 2.6.1
- Linux Kernel 2.6.10 rc2
- Linux Kernel 2.6.10
- Linux Kernel 2.6.11 rc3
- Linux Kernel 2.6.11 rc2
- Linux Kernel 2.6.11 rc4
- Linux Kernel 2.6.11
- Linux Kernel 2.6.11.11
- Linux Kernel 2.6.11.12
- Linux Kernel 2.6.11.5
- Linux Kernel 2.6.11.6
- Linux Kernel 2.6.11.7
- Linux Kernel 2.6.11.8
- Linux Kernel 2.6.12 rc1
- Linux Kernel 2.6.12 rc4
- Linux Kernel 2.6.12 rc5
- Linux Kernel 2.6.12.1
- Linux Kernel 2.6.12.2
- Linux Kernel 2.6.12.3
- Linux Kernel 2.6.12.4
- Linux Kernel 2.6.12.5
- Linux Kernel 2.6.12.6
- Linux Kernel 2.6.13 rc1
- Linux Kernel 2.6.13 rc7
- Linux Kernel 2.6.13 rc6
- Linux Kernel 2.6.13 rc4
- Linux Kernel 2.6.13
- Linux Kernel 2.6.13.1
- Linux Kernel 2.6.13.2
- Linux Kernel 2.6.13.3
- Linux Kernel 2.6.13.4
- Linux Kernel 2.6.14
- Linux Kernel 2.6.14 rc4
- Linux Kernel 2.6.14 rc2
- Linux Kernel 2.6.14 rc1
- Linux Kernel 2.6.14 rc3
- Linux Kernel 2.6.15 rc1
- Linux Kernel 2.6.15 rc2
- Linux Kernel 2.6.15 rc3
- Linux Kernel 2.6.3
- Linux Kernel 2.6.4
- Linux Kernel 2.6.5
- Linux Kernel 2.6.6 rc1
- Linux Kernel 2.6.6
- Linux Kernel 2.6.7 rc1
- Linux Kernel 2.6.7
- Linux Kernel 2.6.8 rc2
- Linux Kernel 2.6.8 rc1
- Linux Kernel 2.6.8 rc3
- Linux Kernel 2.6.8
- Linux Kernel 2.6.9
- Linux Linux Kernel 2.6.14.2
- Linux Linux Kernel 2.6.14.3
- Linux Linux Kernel 2.6.15
- Linux Linux Kernel 2.6.2
- NetBSD NetBSD 1.6
- NetBSD NetBSD 1.6 beta
- NetBSD NetBSD 1.6.1
- NetBSD NetBSD 1.6.2
- NetBSD NetBSD 2.0
- NetBSD NetBSD 2.0.1
- NetBSD NetBSD 2.0.2
- NetBSD NetBSD 2.0.3
- NetBSD NetBSD 2.1
- NetBSD NetBSD CURRENT
Reported:
Jan 09, 2006
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The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.