The TSB I-TLB load implementation in arch/sparc/kernel/tsb.S in the Linux kernel before 2.6.33 on the SPARC platform does not properly obtain the value of a certain _PAGE_EXEC_4U bit and consequently does not properly implement a non-executable stack, which makes it easier for context-dependent attackers to exploit stack-based buffer overflows via a crafted application.

Junjiro R. Okajima discovered that knfsd did not correctly handle strict overcommit. A local attacker could exploit this to crash knfsd, leading to a denial of service. (Only Ubuntu 6.06 LTS and 8.04 LTS were affected.) (CVE-2008-7256, CVE-2010-1643)

Chris Guo, Jukka Taimisto, and Olli Jarva discovered that SCTP did not correctly handle invalid parameters. A remote attacker could send specially crafted traffic that could crash the system, leading to a denial of service. (CVE-2010-1173)

Mario Mikocevic discovered that GFS2 did not correctly handle certain quota structures. A local attacker could exploit this to crash the system, leading to a denial of service. (Ubuntu 6.06 LTS was not affected.) (CVE-2010-1436)

Toshiyuki Okajima discovered that the kernel keyring did not correctly handle dead keyrings. A local attacker could exploit this to crash the system, leading to a denial of service. (CVE-2010-1437)

Brad Spengler discovered that Sparc did not correctly implement non-executable stacks. This made userspace applications vulnerable to exploits that would have been otherwise blocked due to non-executable memory protections. (Ubuntu 10.04 LTS was not affected.) (CVE-2010-1451)

Dan Rosenberg discovered that the btrfs clone function did not correctly validate permissions. A local attacker could exploit this to read sensitive information, leading to a loss of privacy. (Only Ubuntu 9.10 was affected.) (CVE-2010-1636)

Dan Rosenberg discovered that GFS2 set_flags function did not correctly validate permissions. A local attacker could exploit this to gain access to files, leading to a loss of privacy and potential privilege escalation. (Ubuntu 6.06 LTS was not affected.) (CVE-2010-1641)

Shi Weihua discovered that btrfs xattr_set_acl function did not correctly validate permissions. A local attacker could exploit this to gain access to files, leading to a loss of privacy and potential privilege escalation. (Only Ubuntu 9.10 and 10.04 LTS were affected.) (CVE-2010-2071)

Andre Osterhues discovered that eCryptfs did not correctly calculate hash values. A local attacker with certain uids could exploit this to crash the system or potentially gain root privileges. (Ubuntu 6.06 LTS was not affected.) (CVE-2010-2492).

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Several vulnerabilities have been discovered in the Linux kernel that may lead to a denial of service or privilege escalation. The Common Vulnerabilities and Exposures project identifies the following problems :

  - CVE-2009-4537     Fabian Yamaguchi reported a missing check for Ethernet     frames larger than the MTU in the r8169 driver. This may     allow users on the local network to crash a system,     resulting in a denial of service.

  - CVE-2010-0727     Sachin Prabhu reported an issue in the GFS2 filesystem.
    Local users can trigger a BUG() altering the permissions     on a locked file, resulting in a denial of service.

  - CVE-2010-1083     Linus Torvalds reported an issue in the USB subsystem,     which may allow local users to obtain portions of     sensitive kernel memory.

  - CVE-2010-1084     Neil Brown reported an issue in the Bluetooth subsystem     that may permit remote attackers to overwrite memory     through the creation of large numbers of sockets,     resulting in a denial of service.

  - CVE-2010-1086     Ang Way Chuang reported an issue in the DVB subsystem     for Digital TV adapters. By creating a specially-encoded     MPEG2-TS frame, a remote attacker could cause the     receiver to enter an endless loop, resulting in a denial     of service.

  - CVE-2010-1087     Trond Myklebust reported an issue in the NFS filesystem.
    A local user may cause an oops by sending a fatal signal     during a file truncation operation, resulting in a     denial of service.

  - CVE-2010-1088     Al Viro reported an issue where automount symlinks may     not be followed when LOOKUP_FOLLOW is not set. This has     an unknown security impact.

  - CVE-2010-1162     Catalin Marinas reported an issue in the tty subsystem     that allows local attackers to cause a kernel memory     leak, possibly resulting in a denial of service.

  - CVE-2010-1173     Chris Guo from Nokia China and Jukka Taimisto and Olli     Jarva from Codenomicon Ltd reported an issue in the SCTP     subsystem that allows a remote attacker to cause a     denial of service using a malformed init package.

  - CVE-2010-1187     Neil Hormon reported an issue in the TIPC subsystem.
    Local users can cause a denial of service by way of a     NULL pointer dereference by sending datagrams through     AF_TIPC before entering network mode.

  - CVE-2010-1437     Toshiyuki Okajima reported a race condition in the     keyring subsystem. Local users can cause memory     corruption via keyctl commands that access a keyring in     the process of being deleted, resulting in a denial of     service.

  - CVE-2010-1446     Wufei reported an issue with kgdb on the PowerPC     architecture, allowing local users to write to kernel     memory. Note: this issue does not affect binary kernels     provided by Debian. The fix is provided for the benefit     of users who build their own kernels from Debian source.

  - CVE-2010-1451     Brad Spengler reported an issue on the SPARC     architecture that allows local users to execute     non-executable pages.

This update also includes fixes a regression introduced by a previous update. See the referenced Debian bug page for details.

ID	Name	Product	Family	Severity
48253	Ubuntu 6.06 LTS / 8.04 LTS / 9.04 / 9.10 / 10.04 LTS : linux, linux-{source-2.6.15,ec2,mvl-dove,ti-omap} vulnerabilities (USN-966-1)	Nessus	Ubuntu Local Security Checks	high
46725	Debian DSA-2053-1 : linux-2.6 - privilege escalation/denial of service/information leak	Nessus	Debian Local Security Checks	high

Detections

Analytics

CVE-2010-1451

high

Tenable Plugins

high

high