Potential heap based buffer overflow in ParseJSS in VideoLAN VLC before 2.2.5 due to skipping NULL terminator in an input string allows attackers to execute arbitrary code via a crafted subtitles file.

The remote host is affected by the vulnerability described in GLSA-201707-10 (VLC: Multiple vulnerabilities)

    Multiple vulnerabilities have been discovered in VLC. Please review the       CVE identifiers referenced below for details.
  Impact :

    A remote attacker, by enticing a user to open a specially crafted       subtitles file, could possibly execute arbitrary code with the privileges       of the process or cause a Denial of Service condition.
  Workaround :

    There is no known workaround at this time.

Several vulnerabilities have been found in VLC, the VideoLAN project's media player. Processing malformed subtitles or movie files could lead to denial of service and potentially the execution of arbitrary code.

The version of VLC media player installed on the remote host is prior to 2.2.5. It is, therefore, affected by the multiple vulnerabilities :

  - A denial of service vulnerability exists within file plugins\audio_filter\libmpgatofixed32_plugin.dll when     parsing media files due to improper validation of user-supplied input. An unauthenticated, remote attacker     can exploit this, via a specially crafted file, to crash the application. (CVE-2017-9301)

  - A flaw exists, related to a ParseJSS null skip, when handling specially crafted subtitle files downloaded by     the media player. An unauthenticated, remote attacker can exploit this, via a specially crafted file, to     execute arbitrary code.

  - A heap-based buffer overflow condition exists due to improper validation of user-supplied input. An unauthenticated,     remote attacker can exploit this, via a specially crafted AVI file, to execute arbitrary code.

  - A memory corruption issue exists when handling LPCM in VOB files. An unauthenticated, remote attacker can     exploit this, via a specially crafted file, to execute arbitrary code.
    
  - An exploitable vulnerability exists in plugins\codec\libflac_plugin.dll, allows remote attackers to cause     denial of service (heap corruption and application crash) or possibly have unspecified other impact via a crafted     FLAC file. (CVE-2017-9300). 

  - An exploitable Heap out-of-bound read vulnerability exists in ParseJSS of VideoLan VLC. This is due to missing check of     string termination allows attackers to read data beyond allocated memory and potentially crash the process via a crafted     subtitles file. (CVE-2017-8313).

  - An exploitable heap based buffer overflow vulnerability exists in ParseJSS of VideoLan VLC. This is due to skipping NULL     terminator in an input string allows attackers to execute arbitrary code via a crafted subtitles file. (CVE-2017-8311).

  - An exploitable Heap out-of-bound read vulnerability exists in CreateHtmlSubtitle of VideoLan VLC. This is due to missing     check of string termination allows attackers to read data beyond allocated memory and potentially crash the process     (causing a denial of service) via a crafted subtitles file. (CVE-2017-8310).

The remote host is running VLC 2.x prior to 2.2.5.1 and is affected by multiple vulnerabilities :

 - A flaw exists in the OGG demuxer that is triggered by an incorrect memory free. This may allow a context-dependent attacker to have an unspecified impact. No further details have been provided.
 - An out-of-bounds dereference issue in the flac decoder, which may allow a context-dependent attacker to have an unspecified impact. No further details have been provided.
 - An out-of-bounds read flaw exists in the Subtitle decoder and demuxer that may allow a context-dependent attacker to potentially disclose memory contents.
 - An out-of-bounds read flaw exists in the MPEG packetizer that may allow a context-dependent attacker to potentially disclose memory contents.
 - An out-of-bounds read flaw exists in the 'ParseJSS()' function in 'modules/demux/subtitle.c' that is triggered when reading subtitle files. This may allow a context-dependent attacker to cause a crash.
 - An overflow condition exists in the 'ParseJSS()' function in 'modules/demux/subtitle.c' that is triggered as a string terminator is not properly detected when reading subtitle files. This may allow a context-dependent attacker to cause a heap-based buffer overflow, potentially resulting in the execution of arbitrary code.
 - An out-of-bounds read flaw exists in the 'CreateHtmlSubtitle()' function in 'modules/codec/subsdec.c' that is triggered when handling subtitle files. This may allow a context-dependent attacker to cause a crash.
 - A flaw exists related to a ParseJSS null skip that is triggered during the handling of a specially crafted subtitle file that is download by the media player. This may allow a context-dependent attacker to potentially execute arbitrary code.

ID	Name	Product	Family	Severity
101341	GLSA-201707-10 : VLC: Multiple vulnerabilities	Nessus	Gentoo Local Security Checks	high
101066	Debian DSA-3899-1 : vlc - security update	Nessus	Debian Local Security Checks	high
100592	VLC Media Player < 2.2.5 Multiple Vulnerabilities	Nessus	Windows	high
700122	VLC Media Player 2.x < 2.2.5.1 Multiple Vulnerabilities	Nessus Network Monitor	Web Clients	critical

Detections

Analytics

CVE-2017-8311

high

Tenable Plugins

high

high

high

critical