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

  - Mozilla developers and community members reported memory safety bugs present in Firefox 77. Some of these     bugs showed evidence of memory corruption and we presume that with enough effort some of these could have     been exploited to run arbitrary code. This vulnerability affects Firefox < 78. (CVE-2020-12426)

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

This update for MozillaFirefox to version 78.0.1 ESR fixes the following issues :

Security issues fixed :

CVE-2020-12415: AppCache manifest poisoning due to url encoded character processing (bsc#1173576).

CVE-2020-12416: Use-after-free in WebRTC VideoBroadcaster (bsc#1173576).

CVE-2020-12417: Memory corruption due to missing sign-extension for ValueTags on ARM64 (bsc#1173576).

CVE-2020-12418: Information disclosure due to manipulated URL object (bsc#1173576).

CVE-2020-12419: Use-after-free in nsGlobalWindowInner (bsc#1173576).

CVE-2020-12420: Use-After-Free when trying to connect to a STUN server (bsc#1173576).

CVE-2020-12402: RSA Key Generation vulnerable to side-channel attack (bsc#1173576).

CVE-2020-12421: Add-On updates did not respect the same certificate trust rules as software updates (bsc#1173576).

CVE-2020-12422: Integer overflow in nsJPEGEncoder::emptyOutputBuffer (bsc#1173576).

CVE-2020-12423: DLL Hijacking due to searching %PATH% for a library (bsc#1173576).

CVE-2020-12424: WebRTC permission prompt could have been bypassed by a compromised content process (bsc#1173576).

CVE-2020-12425: Out of bound read in Date.parse() (bsc#1173576).

CVE-2020-12426: Memory safety bugs fixed in Firefox 78 (bsc#1173576).

FIPS: MozillaFirefox: allow /proc/sys/crypto/fips_enabled (bsc#1167231).

Non-security issues fixed :

Fixed interaction with freetype6 (bsc#1173613).

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

The version of Firefox installed on the remote macOS or Mac OS X host is prior to 78.0. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2020-24 advisory. Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLES11 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2020:14421-1 advisory.

  - During RSA key generation, bignum implementations used a variation of the Binary Extended Euclidean     Algorithm which entailed significantly input-dependent flow. This allowed an attacker able to perform     electromagnetic-based side channel attacks to record traces leading to the recovery of the secret primes.
    *Note:* An unmodified Firefox browser does not generate RSA keys in normal operation and is not affected,     but products built on top of it might. This vulnerability affects Firefox < 78. (CVE-2020-12402)

  - When %2F was present in a manifest URL, Firefox's AppCache behavior may have become confused and allowed     a manifest to be served from a subdirectory. This could cause the appcache to be used to service requests     for the top level directory. This vulnerability affects Firefox < 78. (CVE-2020-12415)

  - A VideoStreamEncoder may have been freed in a race condition with VideoBroadcaster::AddOrUpdateSink,     resulting in a use-after-free, memory corruption, and a potentially exploitable crash. This vulnerability     affects Firefox < 78. (CVE-2020-12416)

  - Due to confusion about ValueTags on JavaScript Objects, an object may pass through the type barrier,     resulting in memory corruption and a potentially exploitable crash. *Note: this issue only affects Firefox     on ARM64 platforms.* This vulnerability affects Firefox ESR < 68.10, Firefox < 78, and Thunderbird <     68.10.0. (CVE-2020-12417)

  - Manipulating individual parts of a URL object could have caused an out-of-bounds read, leaking process     memory to malicious JavaScript. This vulnerability affects Firefox ESR < 68.10, Firefox < 78, and     Thunderbird < 68.10.0. (CVE-2020-12418)

  - When processing callbacks that occurred during window flushing in the parent process, the associated     window may die; causing a use-after-free condition. This could have led to memory corruption and a     potentially exploitable crash. This vulnerability affects Firefox ESR < 68.10, Firefox < 78, and     Thunderbird < 68.10.0. (CVE-2020-12419)

  - When trying to connect to a STUN server, a race condition could have caused a use-after-free of a pointer,     leading to memory corruption and a potentially exploitable crash. This vulnerability affects Firefox ESR <     68.10, Firefox < 78, and Thunderbird < 68.10.0. (CVE-2020-12420)

  - When performing add-on updates, certificate chains terminating in non-built-in-roots were rejected (even     if they were legitimately added by an administrator.) This could have caused add-ons to become out-of-date     silently without notification to the user. This vulnerability affects Firefox ESR < 68.10, Firefox < 78,     and Thunderbird < 68.10.0. (CVE-2020-12421)

  - In non-standard configurations, a JPEG image created by JavaScript could have caused an internal variable     to overflow, resulting in an out of bounds write, memory corruption, and a potentially exploitable crash.
    This vulnerability affects Firefox < 78. (CVE-2020-12422)

  - When the Windows DLL webauthn.dll was missing from the Operating System, and a malicious one was placed     in a folder in the user's %PATH%, Firefox may have loaded the DLL, leading to arbitrary code execution.
    *Note: This issue only affects the Windows operating system; other operating systems are unaffected.* This     vulnerability affects Firefox < 78. (CVE-2020-12423)

  - When constructing a permission prompt for WebRTC, a URI was supplied from the content process. This URI     was untrusted, and could have been the URI of an origin that was previously granted permission; bypassing     the prompt. This vulnerability affects Firefox < 78. (CVE-2020-12424)

  - Due to confusion processing a hyphen character in Date.parse(), a one-byte out of bounds read could have     occurred, leading to potential information disclosure. This vulnerability affects Firefox < 78.
    (CVE-2020-12425)

  - Mozilla developers and community members reported memory safety bugs present in Firefox 77. Some of these     bugs showed evidence of memory corruption and we presume that with enough effort some of these could have     been exploited to run arbitrary code. This vulnerability affects Firefox < 78. (CVE-2020-12426)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-4408-1 advisory.

    Multiple security issues were discovered in Firefox. If a user were tricked in to opening a specially     crafted website, an attacker could potentially exploit these to cause a denial of service, obtain     sensitive information, bypass permission prompts, or execute arbitrary code. (CVE-2020-12415,     CVE-2020-12416, CVE-2020-12417, CVE-2020-12418, CVE-2020-12419, CVE-2020-12420, CVE-2020-12422,     CVE-2020-12424, CVE-2020-12425, CVE-2020-12426)

    It was discovered that when performing add-on updates, certificate chains not terminating with built-in     roots were silently rejected. This could result in add-ons becoming outdated. (CVE-2020-12421)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

This update for MozillaFirefox to version 78.0.1 ESR fixes the following issues :

Security issues fixed :

  - CVE-2020-12415: AppCache manifest poisoning due to url     encoded character processing (bsc#1173576).

  - CVE-2020-12416: Use-after-free in WebRTC     VideoBroadcaster (bsc#1173576).

  - CVE-2020-12417: Memory corruption due to missing     sign-extension for ValueTags on ARM64 (bsc#1173576).

  - CVE-2020-12418: Information disclosure due to     manipulated URL object (bsc#1173576).

  - CVE-2020-12419: Use-after-free in nsGlobalWindowInner     (bsc#1173576).

  - CVE-2020-12420: Use-After-Free when trying to connect to     a STUN server (bsc#1173576).

  - CVE-2020-12402: RSA Key Generation vulnerable to     side-channel attack (bsc#1173576).

  - CVE-2020-12421: Add-On updates did not respect the same     certificate trust rules as software updates     (bsc#1173576).

  - CVE-2020-12422: Integer overflow in     nsJPEGEncoder::emptyOutputBuffer (bsc#1173576).

  - CVE-2020-12423: DLL Hijacking due to searching %PATH%     for a library (bsc#1173576).

  - CVE-2020-12424: WebRTC permission prompt could have been     bypassed by a compromised content process (bsc#1173576).

  - CVE-2020-12425: Out of bound read in Date.parse()     (bsc#1173576).

  - CVE-2020-12426: Memory safety bugs fixed in Firefox 78     (bsc#1173576).

  - FIPS: MozillaFirefox: allow     /proc/sys/crypto/fips_enabled (bsc#1167231).

Non-security issues fixed :

  - Fixed interaction with freetype6 (bsc#1173613).

This update was imported from the SUSE:SLE-15:Update update project.

The version of Thunderbird installed on the remote macOS or Mac OS X host is prior to 78.0. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2020-29 advisory.

  - When %2F was present in a manifest URL, Firefox's     AppCache behavior may have become confused and allowed a     manifest to be served from a subdirectory. This could     cause the appcache to be used to service requests for     the top level directory. This vulnerability affects     Firefox < 78. (CVE-2020-12415)

  - A VideoStreamEncoder may have been freed in a race     condition with VideoBroadcaster::AddOrUpdateSink,     resulting in a use-after-free, memory corruption, and a     potentially exploitable crash. This vulnerability     affects Firefox < 78. (CVE-2020-12416)

  - Due to confusion about ValueTags on JavaScript Objects,     an object may pass through the type barrier, resulting     in memory corruption and a potentially exploitable     crash. *Note: this issue only affects Firefox on ARM64     platforms.* This vulnerability affects Firefox ESR <     68.10, Firefox < 78, and Thunderbird < 68.10.0.
    (CVE-2020-12417)

  - Manipulating individual parts of a URL object could have     caused an out-of-bounds read, leaking process memory to     malicious JavaScript. This vulnerability affects Firefox     ESR < 68.10, Firefox < 78, and Thunderbird < 68.10.0.
    (CVE-2020-12418)

  - When processing callbacks that occurred during window     flushing in the parent process, the associated window     may die; causing a use-after-free condition. This could     have led to memory corruption and a potentially     exploitable crash. This vulnerability affects Firefox     ESR < 68.10, Firefox < 78, and Thunderbird < 68.10.0.
    (CVE-2020-12419)

  - When trying to connect to a STUN server, a race     condition could have caused a use-after-free of a     pointer, leading to memory corruption and a potentially     exploitable crash. This vulnerability affects Firefox     ESR < 68.10, Firefox < 78, and Thunderbird < 68.10.0.
    (CVE-2020-12420)

  - During RSA key generation, bignum implementations used a     variation of the Binary Extended Euclidean Algorithm     which entailed significantly input-dependent flow. This     allowed an attacker able to perform electromagnetic-     based side channel attacks to record traces leading to     the recovery of the secret primes. *Note:* An unmodified     Firefox browser does not generate RSA keys in normal     operation and is not affected, but products built on top     of it might. This vulnerability affects Firefox < 78.
    (CVE-2020-12402)

  - When performing add-on updates, certificate chains     terminating in non-built-in-roots were rejected (even if     they were legitimately added by an administrator.) This     could have caused add-ons to become out-of-date silently     without notification to the user. This vulnerability     affects Firefox ESR < 68.10, Firefox < 78, and     Thunderbird < 68.10.0. (CVE-2020-12421)

  - In non-standard configurations, a JPEG image created by     JavaScript could have caused an internal variable to     overflow, resulting in an out of bounds write, memory     corruption, and a potentially exploitable crash. This     vulnerability affects Firefox < 78. (CVE-2020-12422)

  - When the Windows DLL webauthn.dll was missing from the     Operating System, and a malicious one was placed in a     folder in the user's %PATH%, Firefox may have loaded the     DLL, leading to arbitrary code execution. *Note: This     issue only affects the Windows operating system; other     operating systems are unaffected.* This vulnerability     affects Firefox < 78. (CVE-2020-12423)

  - When constructing a permission prompt for WebRTC, a URI     was supplied from the content process. This URI was     untrusted, and could have been the URI of an origin that     was previously granted permission; bypassing the prompt.
    This vulnerability affects Firefox < 78.
    (CVE-2020-12424)

  - Due to confusion processing a hyphen character in     Date.parse(), a one-byte out of bounds read could have     occurred, leading to potential information disclosure.
    This vulnerability affects Firefox < 78.
    (CVE-2020-12425)

  - Mozilla developers and community members reported memory     safety bugs present in Firefox 77. Some of these bugs     showed evidence of memory corruption and we presume that     with enough effort some of these could have been     exploited to run arbitrary code. This vulnerability     affects Firefox < 78. (CVE-2020-12426)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The version of Firefox installed on the remote Windows host is prior to 78.0. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2020-24 advisory. Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The version of Thunderbird installed on the remote Windows host is prior to 78.0. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2020-29 advisory.

  - When %2F was present in a manifest URL, Firefox's     AppCache behavior may have become confused and allowed a     manifest to be served from a subdirectory. This could     cause the appcache to be used to service requests for     the top level directory. This vulnerability affects     Firefox < 78. (CVE-2020-12415)

  - A VideoStreamEncoder may have been freed in a race     condition with VideoBroadcaster::AddOrUpdateSink,     resulting in a use-after-free, memory corruption, and a     potentially exploitable crash. This vulnerability     affects Firefox < 78. (CVE-2020-12416)

  - Due to confusion about ValueTags on JavaScript Objects,     an object may pass through the type barrier, resulting     in memory corruption and a potentially exploitable     crash. *Note: this issue only affects Firefox on ARM64     platforms.* This vulnerability affects Firefox ESR <     68.10, Firefox < 78, and Thunderbird < 68.10.0.
    (CVE-2020-12417)

  - Manipulating individual parts of a URL object could have     caused an out-of-bounds read, leaking process memory to     malicious JavaScript. This vulnerability affects Firefox     ESR < 68.10, Firefox < 78, and Thunderbird < 68.10.0.
    (CVE-2020-12418)

  - When processing callbacks that occurred during window     flushing in the parent process, the associated window     may die; causing a use-after-free condition. This could     have led to memory corruption and a potentially     exploitable crash. This vulnerability affects Firefox     ESR < 68.10, Firefox < 78, and Thunderbird < 68.10.0.
    (CVE-2020-12419)

  - When trying to connect to a STUN server, a race     condition could have caused a use-after-free of a     pointer, leading to memory corruption and a potentially     exploitable crash. This vulnerability affects Firefox     ESR < 68.10, Firefox < 78, and Thunderbird < 68.10.0.
    (CVE-2020-12420)

  - During RSA key generation, bignum implementations used a     variation of the Binary Extended Euclidean Algorithm     which entailed significantly input-dependent flow. This     allowed an attacker able to perform electromagnetic-     based side channel attacks to record traces leading to     the recovery of the secret primes. *Note:* An unmodified     Firefox browser does not generate RSA keys in normal     operation and is not affected, but products built on top     of it might. This vulnerability affects Firefox < 78.
    (CVE-2020-12402)

  - When performing add-on updates, certificate chains     terminating in non-built-in-roots were rejected (even if     they were legitimately added by an administrator.) This     could have caused add-ons to become out-of-date silently     without notification to the user. This vulnerability     affects Firefox ESR < 68.10, Firefox < 78, and     Thunderbird < 68.10.0. (CVE-2020-12421)

  - In non-standard configurations, a JPEG image created by     JavaScript could have caused an internal variable to     overflow, resulting in an out of bounds write, memory     corruption, and a potentially exploitable crash. This     vulnerability affects Firefox < 78. (CVE-2020-12422)

  - When the Windows DLL webauthn.dll was missing from the     Operating System, and a malicious one was placed in a     folder in the user's %PATH%, Firefox may have loaded the     DLL, leading to arbitrary code execution. *Note: This     issue only affects the Windows operating system; other     operating systems are unaffected.* This vulnerability     affects Firefox < 78. (CVE-2020-12423)

  - When constructing a permission prompt for WebRTC, a URI     was supplied from the content process. This URI was     untrusted, and could have been the URI of an origin that     was previously granted permission; bypassing the prompt.
    This vulnerability affects Firefox < 78.
    (CVE-2020-12424)

  - Due to confusion processing a hyphen character in     Date.parse(), a one-byte out of bounds read could have     occurred, leading to potential information disclosure.
    This vulnerability affects Firefox < 78.
    (CVE-2020-12425)

  - Mozilla developers and community members reported memory     safety bugs present in Firefox 77. Some of these bugs     showed evidence of memory corruption and we presume that     with enough effort some of these could have been     exploited to run arbitrary code. This vulnerability     affects Firefox < 78. (CVE-2020-12426)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote host is affected by the vulnerability described in GLSA-202007-10 (Mozilla Firefox: Multiple vulnerabilities)

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

    Please review the referenced CVE identifiers for details.
  Workaround :

    There is no known workaround at this time.

ID	Name	Product	Family	Published	Updated	Severity
248188	Linux Distros Unpatched Vulnerability : CVE-2020-12426	Nessus	Misc.	8/11/2025	8/11/2025	high
138494	SUSE SLES12 Security Update : MozillaFirefox (SUSE-SU-2020:1899-1)	Nessus	SuSE Local Security Checks	7/15/2020	3/1/2024	high
138084	Mozilla Firefox < 78.0	Nessus	MacOS X Local Security Checks	7/2/2020	3/4/2024	high
150683	SUSE SLES11 Security Update : MozillaFirefox (SUSE-SU-2020:14421-1)	Nessus	SuSE Local Security Checks	6/10/2021	12/13/2023	high
138133	Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS : Firefox vulnerabilities (USN-4408-1)	Nessus	Ubuntu Local Security Checks	7/6/2020	8/29/2024	high
138786	openSUSE Security Update : MozillaFirefox (openSUSE-2020-1017)	Nessus	SuSE Local Security Checks	7/21/2020	2/29/2024	high
138588	Mozilla Thunderbird < 78.0	Nessus	MacOS X Local Security Checks	7/17/2020	3/1/2024	high
138493	SUSE SLED15 / SLES15 Security Update : MozillaFirefox (SUSE-SU-2020:1898-1)	Nessus	SuSE Local Security Checks	7/15/2020	3/1/2024	high
138747	openSUSE Security Update : MozillaFirefox (openSUSE-2020-983)	Nessus	SuSE Local Security Checks	7/20/2020	2/29/2024	high
138085	Mozilla Firefox < 78.0	Nessus	Windows	7/2/2020	3/4/2024	high
138589	Mozilla Thunderbird < 78.0	Nessus	Windows	7/17/2020	3/1/2024	high
138933	GLSA-202007-10 : Mozilla Firefox: Multiple vulnerabilities	Nessus	Gentoo Local Security Checks	7/27/2020	2/28/2024	high

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