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CVE-2007-4849

Status Candidate

Overview

JFFS2, as used on One Laptop Per Child (OLPC) build 542 and possibly other Linux systems, when POSIX ACL support is enabled, does not properly store permissions during (1) inode creation or (2) ACL setting, which might allow local users to access restricted files or directories after a remount of a filesystem, related to "legacy modes" and an inconsistency between dentry permissions and inode permissions.

Related Files

Ubuntu Security Notice 574-1
Posted Feb 4, 2008
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 574-1 - A massive slew of vulnerabilities relating to the linux-source-2.6.17/20/22 packages have been addressed.

tags | advisory, vulnerability
systems | linux, ubuntu
advisories | CVE-2006-6058, CVE-2007-3107, CVE-2007-4567, CVE-2007-4849, CVE-2007-4997, CVE-2007-5093, CVE-2007-5500, CVE-2007-5501, CVE-2007-5966, CVE-2007-6063, CVE-2007-6151, CVE-2007-6206, CVE-2007-6417, CVE-2008-0001
SHA-256 | 4791c2975b392758be35d2399e875fa6e7ae9cf6c243dde7c9208ac6888d87f0
Ubuntu Security Notice 558-1
Posted Dec 20, 2007
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 558-1 - A slew of vulnerabilities have been addressed for the linux-source-2.6.17/20/22 packages.

tags | advisory, vulnerability
systems | linux, ubuntu
advisories | CVE-2006-6058, CVE-2007-4133, CVE-2007-4567, CVE-2007-4849, CVE-2007-4997, CVE-2007-5093, CVE-2007-5500, CVE-2007-5501
SHA-256 | bdcb9487e60c084ceee2d88ce21a1854691f47e8f5612e67b0f4b24ebf3ee448
Debian Linux Security Advisory 1378-2
Posted Sep 30, 2007
Authored by Debian | Site debian.org

Debian Security Advisory 1378-2 - Several local and remote vulnerabilities have been discovered in the Linux kernel that may lead to a denial of service or the execution of arbitrary code.

tags | advisory, remote, denial of service, arbitrary, kernel, local, vulnerability
systems | linux, debian
advisories | CVE-2007-3731, CVE-2007-3739, CVE-2007-3740, CVE-2007-4573, CVE-2007-4849
SHA-256 | 0605e3e63d0b2b1a9ed33c2af397d4bac98e7c643acc8edde998a2b4b02aa190
Debian Linux Security Advisory 1378-1
Posted Sep 28, 2007
Authored by Debian | Site debian.org

Debian Security Advisory 1378-1 - Several local and remote vulnerabilities have been discovered in the Linux kernel that may lead to a denial of service or the execution of arbitrary code. Evan Teran discovered a potential local denial of service (oops) in the handling of PTRACE_SETREGS and PTRACE_SINGLESTEP requests. Adam Litke reported a potential local denial of service (oops) on powerpc platforms resulting from unchecked VMA expansion into address space reserved for hugetlb pages. Steve French reported that CIFS filesystems with CAP_UNIX enabled were not honoring a process' umask which may lead to unintentionally relaxed permissions. Wojciech Purczynski discovered a vulnerability that can be exploited by a local user to obtain superuser privileges on x86_64 systems. This resulted from improper clearing of the high bits of registers during ia32 system call emulation. This vulnerability is relevant to the Debian amd64 port as well as users of the i386 port who run the amd64 linux-image flavor. Michael Stone reported an issue with the JFFS2 filesystem. Legacy modes for inodes that were created with POSIX ACL support enabled were not being written out to the medium, resulting in incorrect permissions upon remount.

tags | advisory, remote, denial of service, arbitrary, kernel, local, vulnerability
systems | linux, debian, osx
advisories | CVE-2007-3731, CVE-2007-3739, CVE-2007-3740, CVE-2007-4573, CVE-2007-4849
SHA-256 | a56c85f0ecdf3e651d2434a366021bc2c8d68d25429c3ec3ac903a06e6f3497b
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