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.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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. (CVE-2017-7875)

Note that Nessus relies on the presence of the package as reported by the vendor.

Tobias Stoeckmann discovered that it was possible to trigger an out-of-boundary heap write with the image viewer feh while receiving an IPC message.

For Debian 8 'Jessie', this problem has been fixed in version 2.12-1+deb8u1.

We recommend that you upgrade your feh packages.

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

- update to 2.28 fixes rhbz #1438979 #1444077 and #1602421

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

The remote host is affected by the vulnerability described in GLSA-201707-08 (feh: Arbitrary remote code execution)

    Tobias Stoeckmann discovered it was possible to trigger an       out-of-boundary heap write with the image viewer feh while receiving an       IPC message.
  Impact :

    A remote attacker, pretending to be the E17 window manager, could       possibly trigger an out-of-boundary heap write in feh while receiving an       IPC message.  This could result in execution of arbitrary code with the       privileges of the process or a Denial of Service condition.
  Workaround :

    There is no known workaround at this time.

This update for feh on Leap 42.1 fixes this security issue :

  - CVE-2017-7875: In wallpaper.c in feh if a malicious     client pretended to be the E17 window manager, it was     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 (bsc#1034567).

This update for feh on Leap 42.2 to version 2.18.3 fixes several issues.

This security issue was fixed on Leap 42.2 :

  - CVE-2017-7875: In wallpaper.c in feh if a malicious     client pretended to be the E17 window manager, it was     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 (bsc#1034567).

These non-security issue was fixed on Leap 42.2 :

  - boo#955576: added jpegexiforient

  - Fixed image-specific format specifiers not being updated     correctly in thumbnail mode window titles

  - Fixed memory leak when closing images opened from     thumbnail mode

  - Fixed a possible out of bounds read caused by an     unterminated string when using --output to save images     in long paths

  - Fixed out of bounds read/write when handling empty or     broken caption files.

  - Fixed memory leak when saving a filelist or image whose     target filename already exists.

  - Fixed image-specific format specifiers not being updated     correctly

  - New key binding: ! - zoom_fill (zoom to fill window, may     cut off image parts

  - Disable EXIF-based auto rotation by default

  - Added --auto-rotate option to enable auto rotation 

  - Added feh-makefile_app.patch -- fix install location of     icons

  - Install feh icon (both 48x48 and scalable SVG) to     /usr/share/icons when running 'make install app=1'

  - Fixed --sort not being respected after the first reload     when used in conjunction with --reload

  - All key actions can now also be bound to a button by     specifying them in .config/feh/buttons. However, note     that button actions can not be bound to keys.

  - Rename 'menu' key action to 'toggle_menu', 'prev' to     'prev_img' and 'next' to 'next_img'. The old names are     still supported, but no longer documented.

  - feh now also sets the X11 _NET_WM_PID and     WM_CLIENT_MACHINE window properties

  - Fixed compilation on systems where HOST_NAME_MAX is not     defined

  - Also support in-place editing for images loaded via     libcurl or imagemagick. Results will not be written back     to disk in this case.

  - Fixed crash when trying to rotate a JPEG image without     having jpegtran / jpegexiforient installed

  - Handle failing fork() calls gracefully

  - Fixed invalid key/button definitions mis-assigning     keys/buttons to other actions

  - Added sort mode --sort dirname to sort images by     directory instead of by name.

  - Added navigation keys next_dir (]) and prev_dir ([) to     jump to the first image of the nex/previous directory 

  - Fixed toggle_filenames key displaying wrong file numbers     in multiwindow mode

  - Rescale image when resizing a window and --scale-down or
    --geometry is active.

  - Fixed --keep-zoom-vp not keeping the viewport x/y     offsets 

  - Fixed w (size_to_image) key not updating window size     when --scale-down or --geometry is active

  - Added --insecure option to disable HTTPS certificate     checks

  - Added --no-recursive option to disable recursive     directory expansion.

  - Improve --scale-down in tiling environments.

  - --action and --action[1..9] now support action titles

  - -f / --filelist: Do not print useless error message when     a correct filelist file is specified

  - -f / --filelist: Fix bug in '-' / '/dev/stdin' handling     affecting feh running in ksh and possibly other     environments

  - Add --xinerama-index option for background setting

  - When removing the last image in slidsehow mode, stay on     the last (previously second-to-last) image

  - Allow --sort and --randomize to override each other     (most recently specified option wins) instead of always     preferring --sort

  - Thumbnail mode: Mark image as processed when executing     an action (--action) by clicking on an image

  - It is now possible to override feh's idea of the active     xinerama screen using the --xinerama-index option

  - Removed (undocumented) feature allowing to override     feh's idea of the active xinerama screen by setting the     XINERAMA_SCREEN environment variable

  - Removed obsolete gpg macro

Tobias Stoeckmann discovered it was possible to trigger an out-of-boundary heap write with the image viewer feh while receiving an IPC message.

For Debian 7 'Wheezy', these problems have been fixed in version 2.3-2+deb7u1.

We recommend that you upgrade your feh packages.

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

ID	Name	Product	Family	Severity
254378	Linux Distros Unpatched Vulnerability : CVE-2017-7875	Nessus	Misc.	critical
136835	Debian DLA-2219-1 : feh security update	Nessus	Debian Local Security Checks	critical
120688	Fedora 29 : feh (2018-a84b6d0071)	Nessus	Fedora Local Security Checks	critical
120360	Fedora 28 : feh (2018-3ac43a1e15)	Nessus	Fedora Local Security Checks	critical
118941	Fedora 27 : feh (2018-56ec0ccd82)	Nessus	Fedora Local Security Checks	critical
101339	GLSA-201707-08 : feh: Arbitrary remote code execution	Nessus	Gentoo Local Security Checks	critical
99926	openSUSE Security Update : feh (openSUSE-2017-531)	Nessus	SuSE Local Security Checks	critical
99420	Debian DLA-899-1 : feh security update	Nessus	Debian Local Security Checks	critical

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