Title: Linux Kernel IP ID Information Disclosure Weakness
Severity: MODERATE
Description:
The Linux kernel is designed to set the 'ip_id' field of IP packets to zero when the Don't-Fragment (DF) bit is set. Since the 'ip_id' field is used to reassemble fragmented packets, packets that forbid fragmentation don't need this field to be set to a useful value. Some network operating systems always set the 'ip_id' field, regardless of the DF bit status, and this can lead to exploiting affected computers to perform stealth scans. Scans using 'ip_id' fields are typically called idle scans.
The Linux kernel is susceptible to a remote information-disclosure weakness. This issue is due to an implementation flaw of a zero 'ip_id' information-disclosure countermeasure.
This issue presents itself when affected kernels reply to TCP SYN packets with the ACK flag set. The reply packets include non-zero 'ip_id' values.
This issue allows remote attackers to use affected computers in stealth network port and trust scans.
The Linux kernel 2.6 series, as well as some kernels in the 2.4 series, are affected by this weakness.
Affected Products:
- Avaya Converged Communications Server 2.0.0
- Avaya Messaging Storage Server MM3.0
- Avaya S8300
- Avaya S8300 CM 3.1
- Avaya S8300 R2.0.0
- Avaya S8300 R2.0.1
- Avaya S8500
- Avaya S8500 CM 3.1
- Avaya S8500 R2.0.0
- Avaya S8500 R2.0.1
- Avaya S8700 CM 3.1
- Avaya S8700 R2.0.0
- Avaya S8700 R2.0.1
- Avaya S8710 CM 3.1
- Avaya S8710 R2.0.0
- Avaya S8710 R2.0.1
- Debian Linux 3.1.0
- Debian Linux 3.1.0 alpha
- Debian Linux 3.1.0 amd64
- Debian Linux 3.1.0 arm
- Debian Linux 3.1.0 hppa
- Debian Linux 3.1.0 ia-32
- Debian Linux 3.1.0 ia-64
- Debian Linux 3.1.0 m68k
- Debian Linux 3.1.0 mips
- Debian Linux 3.1.0 mipsel
- Debian Linux 3.1.0 ppc
- Debian Linux 3.1.0 s/390
- Debian Linux 3.1.0 sparc
- Linux kernel 2.4.19
- Linux kernel 2.4.21
- Linux kernel 2.4.27
- Linux kernel 2.6.0
- 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 -test3
- 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 -test9-CVS
- Linux kernel 2.6.0 .10
- Linux kernel 2.6.1
- Linux kernel 2.6.1 -rc1
- Linux kernel 2.6.1 -rc2
- Linux kernel 2.6.10
- Linux kernel 2.6.10 rc2
- Linux kernel 2.6.11
- Linux kernel 2.6.11 -rc2
- Linux kernel 2.6.11 -rc3
- Linux kernel 2.6.11 -rc4
- 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
- Linux kernel 2.6.13 -rc1
- Linux kernel 2.6.13 -rc4
- Linux kernel 2.6.13 -rc6
- Linux kernel 2.6.13 -rc7
- 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 -rc1
- Linux kernel 2.6.14 -rc2
- Linux kernel 2.6.14 -rc3
- Linux kernel 2.6.14 -rc4
- Linux kernel 2.6.14 .1
- Linux kernel 2.6.14 .2
- Linux kernel 2.6.14 .3
- Linux kernel 2.6.14.4
- Linux kernel 2.6.14.5
- Linux kernel 2.6.15
- Linux kernel 2.6.15 -rc1
- Linux kernel 2.6.15 -rc2
- Linux kernel 2.6.15 -rc3
- Linux kernel 2.6.15 .4
- Linux kernel 2.6.15.1
- Linux kernel 2.6.15.2
- Linux kernel 2.6.15.3
- Linux kernel 2.6.15.5
- Linux kernel 2.6.15.6
- Linux kernel 2.6.16 -rc1
- Linux kernel 2.6.2
- Linux kernel 2.6.3
- Linux kernel 2.6.4
- Linux kernel 2.6.5
- Linux kernel 2.6.6
- Linux kernel 2.6.6 rc1
- Linux kernel 2.6.7
- Linux kernel 2.6.7 rc1
- Linux kernel 2.6.8
- Linux kernel 2.6.8 rc1
- Linux kernel 2.6.8 rc2
- Linux kernel 2.6.8 rc3
- Linux kernel 2.6.9
- MandrakeSoft Corporate Server 3.0.0
- MandrakeSoft Corporate Server 3.0.0 x86_64
- MandrakeSoft Linux Mandrake 2006.0.0
- MandrakeSoft Linux Mandrake 2006.0.0 x86_64
- MandrakeSoft Multi Network Firewall 2.0.0
- RedHat Desktop 3.0.0
- RedHat Desktop 4.0.0
- RedHat Enterprise Linux AS 3
- RedHat Enterprise Linux AS 4
- RedHat Enterprise Linux ES 3
- RedHat Enterprise Linux ES 4
- RedHat Enterprise Linux WS 3
- RedHat Enterprise Linux WS 4
- RedHat Fedora Core2
- RedHat Fedora Core3
- RedHat Fedora Core4
- S.u.S.E. Linux Enterprise Server 8
- S.u.S.E. Linux Enterprise Server 9
- S.u.S.E. Linux Enterprise Server for S/390
- S.u.S.E. Linux Enterprise Server for S/390 9.0.0
- S.u.S.E. Linux Personal 10.0.0 OSS
- S.u.S.E. Linux Personal 9.1.0
- S.u.S.E. Linux Personal 9.1.0 x86_64
- S.u.S.E. Linux Personal 9.2.0
- S.u.S.E. Linux Personal 9.2.0 x86_64
- S.u.S.E. Linux Personal 9.3.0
- S.u.S.E. Linux Personal 9.3.0 x86_64
- S.u.S.E. Linux Professional 10.0.0
- S.u.S.E. Linux Professional 10.0.0 OSS
- S.u.S.E. Linux Professional 9.1.0
- S.u.S.E. Linux Professional 9.1.0 x86_64
- S.u.S.E. Linux Professional 9.2.0
- S.u.S.E. Linux Professional 9.2.0 x86_64
- S.u.S.E. Linux Professional 9.3.0
- S.u.S.E. Linux Professional 9.3.0 x86_64
- S.u.S.E. Novell Linux Desktop 1.0.0
- S.u.S.E. UnitedLinux 1.0.0
- Trustix Secure Enterprise Linux 2.0.0
- Trustix Secure Linux 2.2.0
- Trustix Secure Linux 3.0.0
- Ubuntu Ubuntu Linux 4.1.0 ia32
- Ubuntu Ubuntu Linux 4.1.0 ia64
- Ubuntu Ubuntu Linux 4.1.0 ppc
- Ubuntu Ubuntu Linux 5.0.0 4 amd64
- Ubuntu Ubuntu Linux 5.0.0 4 i386
- Ubuntu Ubuntu Linux 5.0.0 4 powerpc
- Ubuntu Ubuntu Linux 5.10.0 amd64
- Ubuntu Ubuntu Linux 5.10.0 i386
- Ubuntu Ubuntu Linux 5.10.0 powerpc
References:
- Avaya: ASA-2006-180 - Updated kernel packages for Red Hat Enterprise Linux 3 Update 8 (
- Avaya: ASA-2006-200 - Updated kernel packages available for Red Hat Enterprise Linux 4
- Linux Kernel: Linux 2.6.16.1 ChangeLog
- Red Hat: RHSA-2006:0437-22 - Updated kernel packages for Red Hat Enterprise Linux 3 Updat
- Red Hat: RHSA-2006:0575-22 - Updated kernel packages available for Red Hat Enterprise Lin
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