Linux Kernel eCryptfs Null指针引用本地拒绝服务漏洞

2009-10-0900:00:00

Root

www.seebug.org

EPSS

Percentile

10.1%

JSON

Bugraq ID: 36639
CVE ID：CVE-2009-2908

Linux是一款开放源代码的操作系统。
Linux 'eCryptfs’组件存在漏洞，本地攻击者可以利用漏洞破坏内存进行拒绝服务攻击。
在低dentry调用vfs_unlink()时，当d_count为1，d_delete()会把dentry变为负的dentry。这可导致当 read()或write()完成时引用Null指针及在ecryptfs_read_update_atime()或 ecryptfs_getxattr()中引用负的dentry的d_inode。
在eCryptfs挂接点放置mutt的tmpdir可触发oops，可通过如下序列重现：
open("/tmp/upper/foo", O_RDWR|O_CREAT|O_EXCL|O_NOFOLLOW, 0600) = 3
link("/tmp/upper/foo", "/tmp/upper/bar") = 0
unlink("/tmp/upper/foo") = 0
open("/tmp/upper/bar", O_RDWR|O_CREAT|O_NOFOLLOW, 0600) = 4
unlink("/tmp/upper/bar") = 0
write(4, "eCryptfs test\n"…, 14 <unfinished …>
+++ killed by SIGKILL +++

Linux kernel 2.6.31 -rc7
Linux kernel 2.6.31 -rc6
Linux kernel 2.6.31 -rc3

Trustix Secure Enterprise Linux 2.0
Trustix Secure Linux 2.2
Trustix Secure Linux 2.1
Trustix Secure Linux 2.0
Linux kernel 2.6.31 -rc1
Linux kernel 2.6.31
Linux kernel 2.6.30 rc6
Linux kernel 2.6.30 1
Linux kernel 2.6.30 -rc5
Linux kernel 2.6.30 -rc3
Linux kernel 2.6.30 -rc2
Linux kernel 2.6.30 -rc1
Linux kernel 2.6.30
Linux kernel 2.6.29 4
Linux kernel 2.6.29 1
Linux kernel 2.6.29 -git8
Linux kernel 2.6.29 -git14
Linux kernel 2.6.29 -git1
Linux kernel 2.6.29
Linux kernel 2.6.28 9
Linux kernel 2.6.28 8
Linux kernel 2.6.28 6
Linux kernel 2.6.28 5
Linux kernel 2.6.28 3
Linux kernel 2.6.28 2
Linux kernel 2.6.28 1
Linux kernel 2.6.28 -rc7
Linux kernel 2.6.28 -rc5
Linux kernel 2.6.28 -rc1
Linux kernel 2.6.28 -git7
Linux kernel 2.6.28
Linux kernel 2.6.27 6
Linux kernel 2.6.27 3
Linux kernel 2.6.27 24
Linux kernel 2.6.27 14
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Linux kernel 2.6.27 12
Linux kernel 2.6.27 12
Linux kernel 2.6.27 .8
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Linux kernel 2.6.27 -rc8-git5
Linux kernel 2.6.27 -rc8
Linux kernel 2.6.27 -rc6-git6
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Linux kernel 2.6.26 7
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Linux kernel 2.6.25 19
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Trustix Secure Enterprise Linux 2.0
Trustix Secure Linux 2.2
Trustix Secure Linux 2.1
Trustix Secure Linux 2.0
Linux kernel 2.6.20
Linux kernel 2.6.19 1
Linux kernel 2.6.19 .2
Linux kernel 2.6.19 .1
Linux kernel 2.6.19 -rc4
Linux kernel 2.6.19 -rc3
Trustix Secure Enterprise Linux 2.0
Trustix Secure Linux 2.2
Trustix Secure Linux 2.1
Trustix Secure Linux 2.0
Linux kernel 2.6.19 -rc2
Trustix Secure Enterprise Linux 2.0
Trustix Secure Linux 2.2
Trustix Secure Linux 2.1
Trustix Secure Linux 2.0
Linux kernel 2.6.19 -rc1
Linux kernel 2.6.19
Trustix Secure Enterprise Linux 2.0
Trustix Secure Linux 2.2
Trustix Secure Linux 2.1
Trustix Secure Linux 2.0
Linux kernel 2.6.18 .4
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Linux kernel 2.6.18 .1
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Linux kernel 2.6.16 27
Linux kernel 2.6.16 13
Linux kernel 2.6.16 .9
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Linux kernel 2.6.16 .19
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Linux kernel 2.6.15
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Linux kernel 2.6.15
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Linux kernel 2.6.15
Linux kernel 2.6.15
Trustix Secure Enterprise Linux 2.0
Trustix Secure Linux 2.2
Trustix Secure Linux 2.1
Trustix Secure Linux 2.0
Linux kernel 2.6.14 .5
Linux kernel 2.6.14 .4
Linux kernel 2.6.14 .3
Linux kernel 2.6.14 .2
Linux kernel 2.6.14 .1
Linux kernel 2.6.14 -rc4
Linux kernel 2.6.14 -rc3
Linux kernel 2.6.14 -rc2
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Linux kernel 2.6.14
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Linux kernel 2.6.13 .4
Linux kernel 2.6.13 .3
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Linux kernel 2.6.13 -rc7
Linux kernel 2.6.13 -rc6
Linux kernel 2.6.13 -rc4
Linux kernel 2.6.13 -rc1
Linux kernel 2.6.13
Linux kernel 2.6.13
Trustix Secure Enterprise Linux 2.0
Trustix Secure Linux 2.2
Trustix Secure Linux 2.1
Trustix Secure Linux 2.0
Linux kernel 2.6.12 .6
Linux kernel 2.6.12 .5
Linux kernel 2.6.12 .4
Linux kernel 2.6.12 .3
Linux kernel 2.6.12 .22
Linux kernel 2.6.12 .2
Linux kernel 2.6.12 .12
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Linux kernel 2.6.12 -rc5
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Linux kernel 2.6.11 .8
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Linux kernel 2.6.11 -rc4
Linux kernel 2.6.11 -rc3
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Linux kernel 2.6.10 rc2
Linux kernel 2.6.10
Linux kernel 2.6.10
Linux kernel 2.6.9
Linux kernel 2.6.8 rc3
Linux kernel 2.6.8 rc2
Linux kernel 2.6.8 rc1
Ubuntu Ubuntu Linux 4.1 ppc
Ubuntu Ubuntu Linux 4.1 ia64
Ubuntu Ubuntu Linux 4.1 ia32
Linux kernel 2.6.8
Linux kernel 2.6.7 rc1
Linux kernel 2.6.7
Linux kernel 2.6.6 rc1
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Linux kernel 2.6.2
Linux kernel 2.6.1 -rc2
Linux kernel 2.6.1 -rc1
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Linux kernel 2.6 .10
Linux kernel 2.6 -test9-CVS
Linux kernel 2.6 -test9
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Linux kernel 2.6 -test2
Linux kernel 2.6 -test11
Linux kernel 2.6 -test10
Linux kernel 2.6 -test1
Linux kernel 2.6
Linux kernel 2.6.8.1
S.u.S.E. Linux Personal 9.2 x86_64
S.u.S.E. Linux Personal 9.2
Ubuntu Ubuntu Linux 4.1 ppc
Ubuntu Ubuntu Linux 4.1 ia64
Ubuntu Ubuntu Linux 4.1 ia32
Linux kernel 2.6.31-rc9
Linux kernel 2.6.31-rc8
Linux kernel 2.6.31-rc7
Linux kernel 2.6.31-rc5-git3
Linux kernel 2.6.30.5
Linux kernel 2.6.30.4
Linux kernel 2.6.30.3
Linux kernel 2.6.29-rc2-git1
Linux kernel 2.6.29-rc2
Linux kernel 2.6.29-rc1
Linux kernel 2.6.28.4
Linux kernel 2.6.26.1
Linux kernel 2.6.26-rc5-git1
Linux kernel 2.6.25.4
Linux kernel 2.6.25.3
Linux kernel 2.6.25.2
Linux kernel 2.6.25.1
Linux kernel 2.6.25-rc1
Linux kernel 2.6.24.6
Linux kernel 2.6.24-rc2
Linux kernel 2.6.24-rc1
Linux kernel 2.6.23.14
Linux kernel 2.6.23.10
Linux kernel 2.6.23.1
Linux kernel 2.6.23.09
Linux kernel 2.6.22-rc7
Linux kernel 2.6.22-rc1
Linux kernel 2.6.21-RC6
Linux kernel 2.6.21-RC5
Linux kernel 2.6.21-RC4
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Linux kernel 2.6.20.3
Linux kernel 2.6.20.2
Linux kernel 2.6.20.13
Linux kernel 2.6.20.11
Linux kernel 2.6.20.1
Linux kernel 2.6.20-rc2
Linux kernel 2.6.20-2
Linux kernel 2.6.19 -rc6
Linux kernel 2.6.18-8.1.8.el5
Linux kernel 2.6.18-53
Linux kernel 2.6.18
Linux kernel 2.6.15.5
Linux kernel 2.6.15.11
Linux kernel 2.6.15-27.48
Linux kernel 2.6.11.4
厂商解决方案:

EPSS

Percentile

10.1%

JSON

Related for SSV:12439