Last updated 24 July 2024
A flaw was found in the Linux kernels function pathopenat() in which would incorrectly clear up twice (as part of pathlookupat() called by dotmpfile(). Doing so again can lead to double fput(). This can lead to a use-after free condition.
CVE assignment: http://seclists.org/oss-sec/2015/q3/270
Introduced in this commit: http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=bb458c644a59dbba3a1fe59b27106c5e68e1c4bd
Upstream patch: http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f15133df088ecadd141ea1907f2c96df67c729f0
OSS-SEC request: http://seclists.org/oss-sec/2015/q3/371
The cdfcountchain function in cdf.c in file before 5.19, as used in the Fileinfo component in PHP before 5.4.30 and 5.5.x before 5.5.14, does not properly validate sector-count data, which allows remote attackers to cause a denial of service (application crash) via a crafted CDF file.
Invalid pointer dereference flaws were found in the way file, utility for determining of file types processed header section for certain Composite Document Format (CDF) files. A remote attacker could provide a specially-crafted CDF file, which once inspected by the file utility of the victim would lead to file executable crash.
Last updated 24 July 2024
A use-after-free vulnerability can occur when flushing and resizing layout because the "PressShell" object has been freed while still in use. This results in a potentially exploitable crash during these operations. This vulnerability affects Firefox < 57, Firefox ESR < 52.5, and Thunderbird < 52.5.
The libtremor library has the same flaw as CVE-2018-5146. This library is used by Firefox in place of libvorbis on Android and ARM platforms. This vulnerability affects Firefox ESR < 52.7.2 and Firefox < 59.0.1.
Several fonts on OS X display some Tibetan and Arabic characters as whitespace. When used in the addressbar as part of an IDN this can be used for domain name spoofing attacks. Note: This attack only affects OS X operating systems. Other operating systems are unaffected.
The ConvolveHorizontally function in Skia, as used in Mozilla Firefox before 31.0, Firefox ESR 24.x before 24.7, and Thunderbird before 24.7, does not properly handle the discarding of image data during function execution, which allows remote attackers to execute arbitrary code by triggering prolonged image scaling, as demonstrated by scaling of a high-quality image.
Libgcrypt before 1.6.5 does not properly perform elliptic-point curve multiplication during decryption, which makes it easier for physically proximate attackers to extract ECDH keys by measuring electromagnetic emanations.
Integer overflow in the ProcDRI2GetBuffers function in the DRI2 extension in X.Org Server (aka xserver and xorg-server) 1.7.0 through 1.16.x before 1.16.3 allows remote authenticated users to cause a denial of service (crash) or possibly execute arbitrary code via a crafted request, which triggers an out-of-bounds read or write.
The XInput extension in X.Org X Window System (aka X11 or X) X11R4 and X.Org Server (aka xserver and xorg-server) before 1.16.3 allows remote authenticated users to cause a denial of service (out-of-bounds read or write) or possibly execute arbitrary code via a crafted length or index value to the (1) SProcXChangeDeviceControl, (2) ProcXChangeDeviceControl, (3) ProcXChangeFeedbackControl, (4) ProcXSendExtensionEvent, (5) SProcXIAllowEvents, (6) SProcXIChangeCursor, (7) ProcXIChangeHierarchy, (8) SProcXIGetClientPointer, (9) SProcXIGrabDevice, (10) SProcXIUngrabDevice, (11) ProcXIUngrabDevice, (12) SProcXIPassiveGrabDevice, (13) ProcXIPassiveGrabDevice, (14) SProcXIPassiveUngrabDevice, (15) ProcXIPassiveUngrabDevice, (16) SProcXListDeviceProperties, (17) SProcXDeleteDeviceProperty, (18) SProcXIListProperties, (19) SProcXIDeleteProperty, (20) SProcXIGetProperty, (21) SProcXIQueryDevice, (22) SProcXIQueryPointer, (23) SProcXISelectEvents, (24) SProcXISetClientPointer, (25) SProcXISetFocus, (26) SProcXIGetFocus, or (27) SProcXIWarpPointer function.
The GLX extension in XFree86 4.0, X.Org X Window System (aka X11 or X) X11R6.7, and X.Org Server (aka xserver and xorg-server) before 1.16.3 allows remote authenticated users to cause a denial of service (out-of-bounds read or write) or possibly execute arbitrary code via a crafted length or index value to the (1) glXDispRender, (2) glXDispRenderLarge, (3) glXDispSwapVendorPrivate, (4) glXDispSwapVendorPrivateWithReply, (5) setclientinfo, (6) glXDispSwapSetClientInfoARB, (7) DoSwapInterval, (8) DoGetProgramString, (9) DoGetString, (10) glXDispSwapRenderMode, (11) glXDispGetCompressedTexImage, (12) glXDispSwapGetCompressedTexImage, (13) glXDispFeedbackBuffer, (14) glXDispSwapFeedbackBuffer, (15) glXDispSelectBuffer, (16) glXDispSwapSelectBuffer, (17) glXDispFlush, (18) glXDispSwapFlush, (19) glXDispFinish, (20) glXDispSwapFinish, (21) glXDispReadPixels, (22) glXDispSwapReadPixels, (23) glXDispGetTexImage, (24) glXDispSwapGetTexImage, (25) glXDispGetPolygonStipple, (26) glXDispSwapGetPolygonStipple, (27) glXDispGetSeparableFilter, (28) glXDispGetSeparableFilterEXT, (29) glXDispGetConvolutionFilter, (30) glXDispGetConvolutionFilterEXT, (31) glXDispGetHistogram, (32) glXDispGetHistogramEXT, (33) glXDispGetMinmax, (34) glXDispGetMinmaxEXT, (35) glXDispGetColorTable, (36) glXDispGetColorTableSGI, (37) GetSeparableFilter, (38) GetConvolutionFilter, (39) GetHistogram, (40) GetMinmax, or (41) GetColorTable function.
The SProcXFixesSelectSelectionInput function in the XFixes extension in X.Org X Window System (aka X11 or X) X11R6.8.0 and X.Org Server (aka xserver and xorg-server) before 1.16.3 allows remote authenticated users to cause a denial of service (out-of-bounds read or write) or possibly execute arbitrary code via a crafted length value.
It was found that xorg-x11-server before 1.19.0 including uses memcmp() to check the received MIT cookie against a series of valid cookies. If the cookie is correct, it is allowed to attach to the Xorg session. Since most memcmp() implementations return after an invalid byte is seen, this causes a time difference between a valid and invalid byte, which could allow an efficient brute force attack.
The snprintf implementation in PostgreSQL before 9.0.20, 9.1.x before 9.1.16, 9.2.x before 9.2.11, 9.3.x before 9.3.7, and 9.4.x before 9.4.2 does not properly handle system-call errors, which allows attackers to obtain sensitive information or have other unspecified impact via unknown vectors, as demonstrated by an out-of-memory error.
Last updated 24 July 2024
Last updated 24 July 2024
Buffer overflow in the nsXMLHttpRequest::AppendToResponseText function ...
A race condition flaw was found between the chown() and execve() system calls. When changing the owner of a setuid-user binary to root, the race condition could momentarily make the binary setuid root. When root chown()ed an attacker-owned setuid file to root, the file briefly was setuid root (and executable as such).
An attacker could take advantage of this small window and execute a setuid binary with elevated privileges.
Upstream patch:
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=8b01fc86b9f425899f8a3a8fc1c47d73c2c20543
Additional details:
http://seclists.org/oss-sec/2015/q2/216
arch/x86/kvm/emulate.c in the KVM subsystem in the Linux kernel through 3.17.2 does not properly perform RIP changes, which allows guest OS users to cause a denial of service (guest OS crash) via a crafted application.
It was found that the Linux kernel KVM subsystem's sysenter instruction emulation was not sufficient.
An unprivileged guest user could use this flaw to escalate their privileges by tricking the hypervisor to emulate a SYSENTER instruction in 16-bit mode, if the guest OS does not initialize the SYSENTER MSRs.
Please note that the Red Hat Enterprise Linux with KVM certified guest operating systems do initialize the SYSENTER MSRs and are thus not vulnerable to this issue when running on KVM hypervisor.
References: http://www.openwall.com/lists/oss-security/2015/01/27/6
Upstream patch: http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f3747379accba8e95d70cec0eae0582c8c182050
Acknowledgements:
Red Hat would like to thank Nadav Amit for reporting this issue.
Last updated 24 July 2024
Last updated 24 July 2024
Last updated 24 July 2024
Kernel panic is encountered when sctp stack receives duplicate asconf chunks.
Upstream commmit:
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b69040d8e39f20d5215a03502a8e8b4c6ab78395
Description of the problem: For a TCP-style socket, while processing the COOKIEECHO chunk in sctpsfdo51Dce(), after it has passed a series of sanity check, a new association would be created in sctpunpackcookie(), but afterwards, some processing maybe failed, and sctpassociationfree() will be called to free the previously allocated association, in sctpassociationfree(), skackbacklog value is decremented for this socket, since the initial value for skackbacklog is 0, after the decrement, it will be 65535, a wrap-around problem happens, and if we want to establish new associations afterward in the same socket, ABORT would be triggered since sctp deem the accept queue as full.
A remote attacker can block further connection to the particular sctp server socket by sending a specially crafted sctp packet.
Upstream patch: https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=d3217b15a19a4779c39b212358a5c71d725822ee
Acknowledgements:
Red Hat would like to thank Gopal Reddy Kodudula of Nokia Siemens Networks for reporting this issue.
A flaw was found in the way iommu mapping failures were handled in kvmiommumappages() function in the Linux kernel (introduced by the fix for CVE-2014-3601).
A privileged user in the guest could use this flaw to crash the host in case the guest has access to passed in device.
Introduced by: http://git.kernel.org/cgit/virt/kvm/kvm.git/commit/?id=350b8bdd689cd2ab2c67c8a86a0be86cfa0751a7
Upstream patch: http://git.kernel.org/cgit/virt/kvm/kvm.git/commit/?id=3d32e4dbe71374a6780eaf51d719d76f9a9bf22f
arch/x86/kvm/vmx.c in the KVM subsystem in the Linux kernel through 3.17.2 does not have an exit handler for the INVVPID instruction, which allows guest OS users to cause a denial of service (guest OS crash) via a crafted application.
Last updated 24 July 2024