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CVE-2019-11745

nss: Out-of-bounds write when passing an output buffer smaller than the block size to NSC_EncryptUpdate

When encrypting with a block cipher, if a call to NSC_EncryptUpdate was made with data smaller than the block size, a small out of bounds write could occur. This could have caused heap corruption and a potentially exploitable crash. This vulnerability affects Thunderbird < 68.3, Firefox ESR < 68.3, and Firefox < 71.

CVSS 3.1 · 8.8 High EPSS 3.0% KEV · Not listed
Vendors
Canonical Debian Mozilla and 3 more
Products
Ubuntu Linux Debian Linux Firefox and 26 more
CVE-2019-11741

Mozilla: Isolate addons.mozilla.org and accounts.firefox.com

A compromised sandboxed content process can perform a Universal Cross-site Scripting (UXSS) attack on content from any site it can cause to be loaded in the same process. Because addons.mozilla.org and accounts.firefox.com have close ties to the Firefox product, malicious manipulation of these sites within the browser can potentially be used to modify a user's Firefox configuration. These two sites will now be isolated into their own process and not allowed to be loaded in a standard content process. This vulnerability affects Firefox < 69.

CVSS 3.1 · 6.1 Medium EPSS < 1% KEV · Not listed
Vendors
Mozilla
Products
Firefox
CVE-2019-11738

Mozilla: Content security policy bypass through hash-based sources in directives

If a Content Security Policy (CSP) directive is defined that uses a hash-based source that takes the empty string as input, execution of any javascript: URIs will be allowed. This could allow for malicious JavaScript content to be run, bypassing CSP permissions. This vulnerability affects Firefox < 69 and Firefox ESR < 68.1.

CVSS 3.1 · 6.3 Medium EPSS 1.4% KEV · Not listed
Vendors
Mozilla Opensuse Redhat
Products
Firefox Firefox Esr Leap and 1 more
CVE-2019-11737

Mozilla: Content security policy directives ignore port and path if host is a wildcard

If a wildcard ('*') is specified for the host in Content Security Policy (CSP) directives, any port or path restriction of the directive will be ignored, leading to CSP directives not being properly applied to content. This vulnerability affects Firefox < 69.

CVSS 3.1 · 5.3 Medium EPSS < 1% KEV · Not listed
Vendors
Mozilla
Products
Firefox
CVE-2019-11736

Mozilla: File manipulation and privilege escalation in Mozilla Maintenance Service

The Mozilla Maintenance Service does not guard against files being hardlinked to another file in the updates directory, allowing for the replacement of local files, including the Maintenance Service executable, which is run with privileged access. Additionally, there was a race condition during checks for junctions and symbolic links by the Maintenance Service, allowing for potential local file and directory manipulation to be undetected in some circumstances. This allows for potential privilege escalation by a user with unprivileged local access. <br>*Note: These attacks requires local system access and only affects Windows. Other operating systems are not affected.*. This vulnerability affects Firefox < 69 and Firefox ESR < 68.1.

CVSS 3.1 · 7.0 High EPSS < 1% KEV · Not listed
Vendors
Microsoft Mozilla
Products
Windows Firefox Firefox Esr
CVE-2019-11735

Mozilla: Memory safety bugs fixed in Firefox 69 and Firefox ESR 68.1

Mozilla developers and community members reported memory safety bugs present in Firefox 68 and Firefox ESR 68. Some of these bugs showed evidence of memory corruption and we presume that with enough effort that some of these could be exploited to run arbitrary code. This vulnerability affects Firefox < 69 and Firefox ESR < 68.1.

CVSS 3.1 · 8.8 High EPSS 1.2% KEV · Not listed
Vendors
Mozilla Opensuse Redhat
Products
Firefox Firefox Esr Leap and 1 more
CVE-2019-11734

Mozilla: Memory safety bugs fixed in Firefox 69

Mozilla developers and community members reported memory safety bugs present in Firefox 68. Some of these bugs showed evidence of memory corruption and we presume that with enough effort that some of these could be exploited to run arbitrary code. This vulnerability affects Firefox < 69.

CVSS 3.1 · 9.8 Critical EPSS 1.3% KEV · Not listed
Vendors
Mozilla
Products
Firefox
CVE-2019-11730

Mozilla: Same-origin policy treats all files in a directory as having the same-origin

A vulnerability exists where if a user opens a locally saved HTML file, this file can use file: URIs to access other files in the same directory or sub-directories if the names are known or guessed. The Fetch API can then be used to read the contents of any files stored in these directories and they may uploaded to a server. It was demonstrated that in combination with a popular Android messaging app, if a malicious HTML attachment is sent to a user and they opened that attachment in Firefox, due to that app's predictable pattern for locally-saved file names, it is possible to read attachments the victim received from other correspondents. This vulnerability affects Firefox ESR < 60.8, Firefox < 68, and Thunderbird < 60.8.

CVSS 3.1 · 6.5 Medium EPSS 20.3% KEV · Not listed
Vendors
Debian Mozilla Opensuse and 2 more
Products
Debian Linux Firefox Firefox Esr and 5 more
CVE-2019-11728

Mozilla: Port scanning through Alt-Svc header

The HTTP Alternative Services header, Alt-Svc, can be used by a malicious site to scan all TCP ports of any host that the accessible to a user when web content is loaded. This vulnerability affects Firefox < 68.

CVSS 3.1 · 4.7 Medium EPSS 1.1% KEV · Not listed
Vendors
Mozilla Opensuse
Products
Firefox Leap
CVE-2019-11727

nss: PKCS#1 v1.5 signatures can be used for TLS 1.3

A vulnerability exists where it possible to force Network Security Services (NSS) to sign CertificateVerify with PKCS#1 v1.5 signatures when those are the only ones advertised by server in CertificateRequest in TLS 1.3. PKCS#1 v1.5 signatures should not be used for TLS 1.3 messages. This vulnerability affects Firefox < 68.

CVSS 3.0 · 5.3 Medium EPSS 1.8% KEV · Not listed
Vendors
Mozilla Redhat
Products
Firefox Enterprise Linux Openshift Do
CVE-2019-11725

Mozilla: Websocket resources bypass safebrowsing protections

When a user navigates to site marked as unsafe by the Safebrowsing API, warning messages are displayed and navigation is interrupted but resources from the same site loaded through websockets are not blocked, leading to the loading of unsafe resources and bypassing safebrowsing protections. This vulnerability affects Firefox < 68.

CVSS 3.1 · 6.5 Medium EPSS 1.1% KEV · Not listed
Vendors
Mozilla Opensuse
Products
Firefox Leap
CVE-2019-11724

Mozilla: Retired site input.mozilla.org has remote troubleshooting permissions

Application permissions give additional remote troubleshooting permission to the site input.mozilla.org, which has been retired and now redirects to another site. This additional permission is unnecessary and is a potential vector for malicious attacks. This vulnerability affects Firefox < 68.

CVSS 3.1 · 6.1 Medium EPSS 1.1% KEV · Not listed
Vendors
Mozilla Opensuse
Products
Firefox Leap
CVE-2019-11723

Mozilla: Cookie leakage during add-on fetching across private browsing boundaries

A vulnerability exists during the installation of add-ons where the initial fetch ignored the origin attributes of the browsing context. This could leak cookies in private browsing mode or across different "containers" for people who use the Firefox Multi-Account Containers Web Extension. This vulnerability affects Firefox < 68.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
Vendors
Mozilla Opensuse
Products
Firefox Leap
CVE-2019-11721

Mozilla: Domain spoofing through unicode latin 'kra' character

The unicode latin 'kra' character can be used to spoof a standard 'k' character in the addressbar. This allows for domain spoofing attacks as do not display as punycode text, allowing for user confusion. This vulnerability affects Firefox < 68.

CVSS 3.1 · 6.5 Medium EPSS 1.4% KEV · Not listed
Vendors
Mozilla Opensuse
Products
Firefox Leap
CVE-2019-11720

Mozilla: Character encoding XSS vulnerability

Some unicode characters are incorrectly treated as whitespace during the parsing of web content instead of triggering parsing errors. This allows malicious code to then be processed, evading cross-site scripting (XSS) filtering. This vulnerability affects Firefox < 68.

CVSS 3.1 · 6.1 Medium EPSS 1.1% KEV · Not listed
Vendors
Mozilla Opensuse
Products
Firefox Leap
CVE-2019-11718

Mozilla: Activity Stream writes unsanitized content to innerHTML

Activity Stream can display content from sent from the Snippet Service website. This content is written to innerHTML on the Activity Stream page without sanitization, allowing for a potential access to other information available to the Activity Stream, such as browsing history, if the Snipper Service were compromised. This vulnerability affects Firefox < 68.

CVSS 3.1 · 5.3 Medium EPSS 1.2% KEV · Not listed
Vendors
Mozilla Opensuse
Products
Firefox Leap
CVE-2019-11716

Mozilla: globalThis not enumerable until accessed

Until explicitly accessed by script, window.globalThis is not enumerable and, as a result, is not visible to code such as Object.getOwnPropertyNames(window). Sites that deploy a sandboxing that depends on enumerating and freezing access to the window object may miss this, allowing their sandboxes to be bypassed. This vulnerability affects Firefox < 68.

CVSS 3.0 · 8.3 High EPSS 1.4% KEV · Not listed
Vendors
Mozilla
Products
Firefox
CVE-2019-11714

Mozilla: NeckoChild can trigger crash when accessed off of main thread

Necko can access a child on the wrong thread during UDP connections, resulting in a potentially exploitable crash in some instances. This vulnerability affects Firefox < 68.

CVSS 3.0 · 9.8 Critical EPSS 1.7% KEV · Not listed
Vendors
Mozilla
Products
Firefox
CVE-2019-11710

Mozilla: Memory safety bugs fixed in Firefox 68

Mozilla developers and community members reported memory safety bugs present in Firefox 67. Some of these bugs showed evidence of memory corruption and we presume that with enough effort that some of these could be exploited to run arbitrary code. This vulnerability affects Firefox < 68.

CVSS 3.1 · 9.8 Critical EPSS 1.7% KEV · Not listed
Vendors
Mozilla Opensuse
Products
Firefox Leap
CVE-2019-11702

Mozilla: IE protocols can be used to open known local files

A hyperlink using protocols associated with Internet Explorer, such as IE.HTTP:, can be used to open local files at a known location with Internet Explorer if a user approves execution when prompted. *Note: this issue only occurs on Windows. Other operating systems are unaffected.*. This vulnerability affects Firefox < 67.0.2.

CVSS 3.0 · 6.5 Medium EPSS 1.4% KEV · Not listed
Vendors
Microsoft Mozilla
Products
Windows Firefox