As per upstream samba advisory:
All versions of Samba from 3.5.0 to 4.2.0rc4 are vulnerable to an unexpected code execution vulnerability in the smbd file server daemon.
A malicious client could send packets that may set up the stack in such a way that the freeing of memory in a subsequent anonymous netlogon packet could allow execution of arbitrary code. This code would execute with root privileges.
An improper input sanitization flaw was found in the way JBoss Seam web application framework processed certain parametrized JBoss Expression Language expressions. A remote attacker could use this flaw to execute arbitrary code via a URL, containing appended, specially-crafted expression language parameters, provided to certain applications based on the JBoss Seam framework. Note: A properly configured and enabled Java Security Manager would prevent exploitation of this flaw.
References: [1] http://seamframework.org/ [2] http://docs.jboss.org/seam/2.2.0.GA/en-US/html/elenhancements.html
Acknowledgements:
Red Hat would like to thank Meder Kydyraliev of Google Security Team for responsibly reporting this issue.
A race condition was found in the way Linux kernel's memory subsystem handled breakage of the read only private mappings COW situation on write access.
An unprivileged local user could use this flaw to gain write access to otherwise read only memory mappings and thus increase their privileges on the system.
Red Hat is aware of this issue and if you have questions about the affectedness of your system please contact Red Hat Support. For additional information see https://access.redhat.com/security/vulnerabilities/2706661
A vulnerability found in the Linux kernel's WMM implementation for Marvell WiFi-based hardware (mwifiex) could lead to a denial of service or allow arbitrary code execution. For this flaw to be executed, the attacker must be both local and privileged. There is no mitigation to this flaw. A patch has been provided to remediate this flaw.
Quoting first paragraph from [1]: https://bugzilla.redhat.com/showbug.cgi?id=173008
for issue description: ====================== When starting a program via "su - user -c program" the user session can escape to the parent session by using the TIOCSTI ioctl to push characters into the input buffer. This allows for example a non-root session to push "chmod 666 /etc/shadow" or similarly bad commands into the input buffer such that after the end of the session they are executed.
References: [1] https://bugzilla.redhat.com/showbug.cgi?id=173008 [2] http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=628843
A certain Red Hat patch for net/ipv4/route.c in the Linux kernel 2.6.18 on Red Hat Enterprise Linux (RHEL) 5 allows remote attackers to cause a denial of service (deadlock) via crafted packets that force collisions in the IPv4 routing hash table, and trigger a routing "emergency" in which a hash chain is too long. NOTE: this is related to an issue in the Linux kernel before 2.6.31, when the kernel routing cache is disabled, involving an uninitialized pointer and a panic.
The Floppy Disk Controller (FDC) in QEMU, as used in Xen 4.5.x and earlier and KVM, allows local guest users to cause a denial of service (out-of-bounds write and guest crash) or possibly execute arbitrary code via the (1) FDCMDREADID, (2) FDCMDDRIVESPECIFICATIONCOMMAND, or other unspecified commands, aka VENOM.
Created attachment 795808 [details] preliminary patch to set credentials before execve
Description of problem:
If a tcpmux service is enabled, the user and group directives are ignored and the service always runs as root. Verified in the xinetd codebase and affects all active versions of RHEL and Fedora. Without the fix for CVE-2012-0862, previously exposed non-tcpmux services could run as root bypassing their respective user and group restrictions.
Version-Release number of selected component (if applicable): 2.3.15-6
How reproducible: Always
Steps to Reproduce: 1. Enabled tcpmux-server 2. Create a sample tcpmux service
service testcred { id = tcpmux-testcred disable = no user = nobody group = nobody sockettype = stream type = TCPMUXPLUS UNLISTED flags = NAMEINARGS server = /usr/bin/id serverargs = id wait = no }
3. telnet localhost 1 4. type testcred
Actual results: Trying 127.0.0.1... Connected to localhost. Escape character is '^]'. testcred +Go uid=0(root) gid=0(root) groups=0(root)
Expected results: Trying 127.0.0.1... Connected to localhost. Escape character is '^]'. testcred +Go uid=99(nobody) gid=99(nobody) groups=99(nobody)
Additional info:
Buffer overflow in client/mysql.cc in Oracle MySQL and MariaDB before 5.5.35 allows remote database servers to cause a denial of service (crash) and possibly execute arbitrary code via a long server version string.
A vulnerability was found in the Linux kernel in function rdsincinfocopy of file net/rds/recv.c. The last field "flags" of object "minfo" is not initialized. Copying this object out may leak kernel stack data. Assign 0 to it to avoid leak.
Upstream bug:
https://patchwork.ozlabs.org/patch/629110/
Upstream fix:
https://git.kernel.org/cgit/linux/kernel/git/davem/net.git/commit/?id=4116def2337991b39919f3b448326e21c40e0dbb
It was found that OpenSSL was vulnerable to a SSL/TLS MITM vulnerability. An attacker using a carefully crafted handshake can force the use of weak keying material in OpenSSL SSL/TLS clients and servers. This can be exploited by a Man-in-the-middle (MITM) attack where the attacker can decrypt and modify traffic from the attacked client and server.
As per the upstream advisory:
The attack can only be performed between a vulnerable client and server. OpenSSL clients are vulnerable in all versions of OpenSSL. Servers are only known to be vulnerable in OpenSSL 1.0.1 and 1.0.2-beta1. Users of OpenSSL servers earlier than 1.0.1 are advised to upgrade as a precaution.
OpenSSL 0.9.8 SSL/TLS users (client and/or server) should upgrade to 0.9.8za. OpenSSL 1.0.0 SSL/TLS users (client and/or server) should upgrade to 1.0.0m. OpenSSL 1.0.1 SSL/TLS users (client and/or server) should upgrade to 1.0.1h.
Acknowledgements:
Red Hat would like to thank the OpenSSL project for reporting this issue. Upstream acknowledges KIKUCHI Masashi of Lepidum as the original reporter of this issue.
A security flaw was found in the way init script implementation of the Tomcat service, an Apache Servlet/JSP Engine, as used in various versions of Red Hat Enterprise Linux and Fedora, performed management of Tomcat log file. A local attacker could use this flaw to cause denial of service or, potentially, execute arbitrary code with the privileges of the privileged system user (root) via symbolic link attacks on Tomcat log file.
Acknowledgements:
Red Hat would like to thank Simon Fayer of Imperial College London for reporting this issue.
It was discovered that the formatted printing functionality in glibc did not properly restrict the use of alloca(). A remote attacker could provide a specially crafted sequence of format specifiers, leading to a crash or, potentially, FORTIFYSOURCE format string protection mechanism bypass, when processed.
A certain Red Hat patch to the brdeliver function in net/bridge/brforward.c in the Linux kernel 2.6.18 on Red Hat Enterprise Linux (RHEL) 5 allows remote attackers to cause a denial of service (NULL pointer dereference and system crash) or possibly have unspecified other impact by leveraging connectivity to a network interface that uses an Ethernet bridge device.
The DNS protocol, as implemented in (1) BIND 8 and 9 before 9.5.0-P1, 9.4.2-P1, and 9.3.5-P1; (2) Microsoft DNS in Windows 2000 SP4, XP SP2 and SP3, and Server 2003 SP1 and SP2; and other implementations allow remote attackers to spoof DNS traffic via a birthday attack that uses in-bailiwick referrals to conduct cache poisoning against recursive resolvers, related to insufficient randomness of DNS transaction IDs and source ports, aka "DNS Insufficient Socket Entropy Vulnerability" or "the Kaminsky bug."
Xen allows guest OS users to obtain sensitive information from uninitialized locations in host OS kernel memory by not enabling memory and I/O decoding control bits. NOTE: this vulnerability exists because of an incomplete fix for CVE-2015-0777.
cache.py in Suds 0.4, when tempdir is set to None, allows local users to redirect SOAP queries and possibly have other unspecified impact via a symlink attack on a cache file with a predictable name in /tmp/suds/.
A flaw was found in the way ansi cprng implementation in the Linux kernel processed non-block size aligned requests. If several small requests are made that are less than the instances block size, the remainder for loop code doesn't increment randdatavalid in the last iteration, meaning that the last bytes in the randdata buffer gets reused on the subsequent smaller-than-a-block request for random data.
Acknowledgements:
Red Hat would like to thank Stephan Mueller for reporting this issue.
Last updated 24 July 2024
A certain Red Hat script for sudo 1.7.2 on Red Hat Enterprise Linux (RHEL) 5 allows local users to overwrite arbitrary files via a symlink attack on the /var/tmp/nsswitch.conf.bak temporary file.
Description of problem: Dom0 crashes when installing GPLPV drivers on Windows 2008 R2 guest.
Xen version: 3.1.2-194.11.3.el5 Dom0 kernel: 2.6.18-194.11.3.el5xen GPLPV: gplpvVista2008x640.11.0.213.msi and older
Redirected to serial console output:
Unable to handle kernel NULL pointer dereference at 0000000000000108 RIP: [<ffffffff8883f03f>] :blkbk:updateblkifstatus+0x21f/0x2ae PGD 0 Oops: 0000 [1] SMP last sysfs file: /class/net/lo/ifindex CPU 2 Modules linked in: tun xfs ocfs2(U) iptMASQUERADE netloop iptablenat ipnat netbk blktap blkbk mptctl mptbase ipmiwatchdog ipmisi(U) ipmidevintf(U) ipmimsghandler(U) autofs4 hidp l2cap bluetooth ocfs2dlmfs(U) ocfs2dlm(U) ocfs2nodemanager(U) configfs lockd sunrpc bonding ipconntracknetbiosns iptREJECT xtstate ipconntrack nfnetlink xtphysdev bridge iptablefilter iptables ip6tREJECT xttcpudp ip6tablefilter ip6tables xtables ipv6 xfrmnalgo cryptoapi be2iscsi ibiser rdmacm ibcm iwcm ibsa ibmad ibcore ibaddr iscsitcp bnx2i(U) cnic(U) cxgb3i cxgb3 libiscsitcp libiscsi2 scsitransportiscsi2 scsitransportiscsi loop dmroundrobin dmmultipath scsidh video backlight sbs powermeter hwmon i2cec i2ccore dellwmi wmi button battery asusacpi ac parportpc lp parport srmod cdrom sg serioraw pcspkr hpilo serialcore bnx2x(U) 8021q dmraid45 dmmessage dmregionhash dmmemcache dmsnapshot dmzero dmmirror dmlog dmmod usbstorage shpchp cciss(U) sdmod scsimod ext3 jbd uhcihcd ohcihcd ehcihcd Pid: 69, comm: xenwatch Tainted: G 2.6.18-194.11.3.el5xen 0000001 RIP: e030:[<ffffffff8883f03f>] [<ffffffff8883f03f>] :blkbk:updateblkifstatus+0x21f/0x2ae RSP: e02b:ffff88003e413df0 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff88003db2f620 RCX: 0000000000000003 RDX: ffffffffff578000 RSI: fffffffffffffffb RDI: 0000000000000000 RBP: ffff880031227b70 R08: 00000000ffffffff R09: 0000000000000020 R10: 00000000ffffffff R11: 0000000000000000 R12: ffff8800087edb40 R13: 0000000000000000 R14: ffff880000e0bcf0 R15: ffffffff8029c1ef FS: 00002b79280d26e0(0000) GS:ffffffff805d2100(0000) knlGS:0000000000000000 CS: e033 DS: 0000 ES: 0000 Process xenwatch (pid: 69, threadinfo ffff88003e412000, task ffff88003e3ea080) Stack: 2e6b6361626b6c62 0000006364682e33 ffff880000000025 ffff8800087edb40 ffff880034383c00 ffff8800087edb40 ffff880034383c00 ffffffff8883f2eb 6669636570736e75 737361202c646569 Call Trace: [<ffffffff8883f2eb>] :blkbk:frontendchanged+0x21d/0x226 [<ffffffff803b9c78>] xenwatchthread+0x0/0x135 [<ffffffff803b90ca>] xenwatchhandlecallback+0x15/0x48 [<ffffffff803b9d94>] xenwatchthread+0x11c/0x135 [<ffffffff8029c407>] autoremovewakefunction+0x0/0x2e [<ffffffff8029c1ef>] keventdcreatekthread+0x0/0xc4 [<ffffffff80233be4>] kthread+0xfe/0x132 [<ffffffff80260b2c>] childrip+0xa/0x12 [<ffffffff8029c1ef>] keventdcreatekthread+0x0/0xc4 [<ffffffff80233ae6>] kthread+0x0/0x132 [<ffffffff80260b22>] childrip+0x0/0x12
Code: 48 8b b8 08 01 00 00 e8 b3 f6 a7 f7 85 c0 89 c6 74 0d 48 8b RIP [<ffffffff8883f03f>] :blkbk:updateblkifstatus+0x21f/0x2ae RSP <ffff88003e413df0> CR2: 0000000000000108 <0>Kernel panic - not syncing: Fatal exception (XEN) Domain 0 crashed: rebooting machine in 5 seconds.
http://bugs.centos.org/bugviewadvancedpage.php?bugid=4517
Acknowledgements:
Red Hat would like to thank Vladymyr Denysov for reporting this issue.
An integer overflow flaw was found in the way samba read an EA list provided by the client. A malicious client could send a specially crafted EA list that wraps perfectly on a 32-bit boundary, causing the server to loop and re-process the list. This can cause Denial of Service via memory exhaustion.
Reference:
https://bugzilla.samba.org/showbug.cgi?id=10010 (curently private)
sosreport in Red Hat sos 1.7 and earlier on Red Hat Enterprise Linux (RHEL) 5 produces an archive with an fstab file potentially containing cleartext passwords, and lacks a warning about reviewing this archive to detect included passwords, which might allow remote attackers to obtain sensitive information by leveraging access to a technical-support data stream.
Due to a problem with the patch used to correct a problem with LDAP servers not correctly returning an opaque cookie to check for additional results when getting paged results from a server on 64-bit PowerPC and IBM System z platforms (RHBA-2012:0264), it was possible for a user to cause a denial of service of the autofs service. While this may not impact mounts that have already been mounted (other than preventing mount expiration), it will prevent any future mount requests from being processed until autofs is restarted.
arch/x86/hvm/vmx/vmcs.c in the virtual-machine control structure (VMCS) implementation in the Linux kernel 2.6.18 on Red Hat Enterprise Linux (RHEL) 5, when an Intel platform without Extended Page Tables (EPT) functionality is used, accesses VMCS fields without verifying hardware support for these fields, which allows local users to cause a denial of service (host OS crash) by requesting a VMCS dump for a fully virtualized Xen guest.
The udpqueuercvskb function in net/ipv4/udp.c in a certain Red Hat build of the Linux kernel 2.6.18 in Red Hat Enterprise Linux (RHEL) 5 allows attackers to cause a denial of service (deadlock and system hang) by sending UDP traffic to a socket that has a crafted socket filter, a related issue to CVE-2010-4158.
Linux kernel built with an Ext4 file system is vulnerable to a system hang situation when [auto]mounting a non-journal filesystem with an orphan list to clear.
A user could use this flaw to stall the system resulting in DoS.
Upstream fix: ------------- -> https://git.kernel.org/linus/0e9a9a1ad619e7e987815d20262d36a2f95717ca
shadow: TOCTOU (time-of-check time-of-use) race condition when copying and removing directory trees
ibutils packages as shipped in Red Hat Enterprise Linux 4 and 5 are built to use insecure RPATH set in the ELF header of the ibmssh command.
This issue can possibly be exploited by a local attacker to run arbitrary code as some other user if victim user can be convinced to run ibmssh command in an attacker controlled directory with specially crafted content.
Affected binary: /usr/bin/ibmssh RPATH: refix/lib
The dissectpacket function in epan/packet.c in Wireshark 1.4.x before 1.4.11 and 1.6.x before 1.6.5 allows remote attackers to cause a denial of service (application crash) via a long packet in a capture file, as demonstrated by an airopeek file.