CVE-2017-7875

In wallpaper.c in feh before v2.18.3, if a malicious client pretends to be the E17 window manager, it is possible to trigger an out-of-boundary heap write while receiving an IPC message. An integer overflow leads to a buffer overflow and/or a double free.

Updated feh package to fix a double-free/OOB-write in E17 IPC. This was a potential security issue as a malicious X11 app running alongside feh and pretending to be an E17 window manager could have had access to out-of-bound memory. Security vulnerability: CVE-2017-7875

This kernel update is based on upstream 4.4.68 and fixes at least the following security issues:

The NFSv2/NFSv3 server in the nfsd subsystem in the Linux kernel through 4.10.11 allows remote attackers to cause a denial of service (system crash) via a long RPC reply, related to net/sunrpc/svc.c, fs/nfsd/nfs3xdr.c, and fs/nfsd/nfsxdr.c (CVE-2017-7645).

The NFSv2 and NFSv3 server implementations in the Linux kernel through 4.10.13 lack certain checks for the end of a buffer, which allows remote attackers to trigger pointer-arithmetic errors or possibly have unspecified other impact via crafted requests, related to fs/nfsd/nfs3xdr.c and fs/nfsd/nfsxdr.c (CVE-2017-7895).

For other upstream fixes in this update, see the referenced changelogs.

These are all security issues fixed in the feh-3.7-1.3 package on the GA media of openSUSE Tumbleweed.

It was discovered that feh incorrectly handled certain IPC messages from a client pretending to be the Enlightenment window manager, leading to an integer overflow. An attacker could possibly use this issue to cause feh to crash, resulting in a denial of service, or possibly execute arbitrary code.