| Description: | Summary:
The remote host is missing an update for the Debian 'linux-4.9' package(s) announced via the DLA-1715-1 advisory.
Vulnerability Insight:
Several vulnerabilities have been discovered in the Linux kernel that may lead to a privilege escalation, denial of service or information leaks.
CVE-2017-18249
A race condition was discovered in the disk space allocator of F2FS. A user with access to an F2FS volume could use this to cause a denial of service or other security impact.
CVE-2018-1128, CVE-2018-1129 The cephx authentication protocol used by Ceph was susceptible to replay attacks, and calculated signatures incorrectly. These vulnerabilities in the server required changes to authentication that are incompatible with existing clients. The kernel's client code has now been updated to be compatible with the fixed server.
CVE-2018-3639 (SSB) Multiple researchers have discovered that Speculative Store Bypass (SSB), a feature implemented in many processors, could be used to read sensitive information from another context. In particular, code in a software sandbox may be able to read sensitive information from outside the sandbox. This issue is also known as Spectre variant 4. This update adds a further mitigation for this issue in the eBPF (Extended Berkeley Packet Filter) implementation.
CVE-2018-5391 (FragmentSmack) Juha-Matti Tilli discovered a flaw in the way the Linux kernel handled reassembly of fragmented IPv4 and IPv6 packets. A remote attacker can take advantage of this flaw to trigger time and calculation expensive fragment reassembly algorithms by sending specially crafted packets, leading to remote denial of service. This was previously mitigated by reducing the default limits on memory usage for incomplete fragmented packets. This update replaces that mitigation with a more complete fix.
CVE-2018-5848
The wil6210 wifi driver did not properly validate lengths in scan and connection requests, leading to a possible buffer overflow. On systems using this driver, a local user with the CAP_NET_ADMIN capability could use this for denial of service (memory corruption or crash) or potentially for privilege escalation.
CVE-2018-12896, CVE-2018-13053 Team OWL337 reported possible integer overflows in the POSIX timer implementation. These might have some security impact.
CVE-2018-13096, CVE-2018-13097, CVE-2018-13100, CVE-2018-14614, CVE-2018-14616 Wen Xu from SSLab at Gatech reported that crafted F2FS volumes could trigger a crash (BUG, Oops, or division by zero) and/or out-of-bounds memory access. An attacker able to mount such a volume could use this to cause a denial of service or possibly for privilege escalation.
CVE-2018-13406
Dr Silvio Cesare of InfoSect reported a potential integer overflow in the uvesafb driver. A user with permission to access such a device might be able to use this for denial of service or privilege escalation.
CVE-2018-14610, CVE-2018-14611, CVE-2018-14612, CVE-2018-14613 Wen Xu from SSLab at Gatech reported that crafted Btrfs volumes could trigger a crash (Oops) and/or ... [Please see the references for more information on the vulnerabilities]
Affected Software/OS:
'linux-4.9' package(s) on Debian 8.
Solution:
Please install the updated package(s).
CVSS Score:
7.8
CVSS Vector:
AV:N/AC:L/Au:N/C:N/I:N/A:C
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