SB2021050101 - Gentoo update for Mozilla Firefox
Published: May 1, 2021
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 27 secuirty vulnerabilities.
1) Information disclosure (CVE-ID: CVE-2021-23961)
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to the way Firefox handles requests to internal resources. A remote attacker can create a specially crafted web page and combined with slipstream research techniques collect information about hosts in internal network as well as services running on the user's local machine.
2) Improperly implemented security check for standard (CVE-ID: CVE-2021-23968)
The vulnerability allows a remote attacker to bypass implemented security restrictions.
The vulnerability exists due to incorrect implementation of W3C Content Security Policy. If Content Security Policy blocked frame navigation, the full destination of a redirect served in the frame was reported in the violation report; as opposed to the original frame URI. A remote attacker can gain knowledge of sensitive information contained in such URIs.3) Improperly implemented security check for standard (CVE-ID: CVE-2021-23969)
The vulnerability allows a remote attacker to bypass implemented security restrictions.
The vulnerability exists due to incorrect implementation of W3C Content Security Policy. Under certain types of redirects Firefox incorrectly sets the source
file to be the destination of the redirects. A remote attacker can gain knowledge of the destination URL.
4) Reachable Assertion (CVE-ID: CVE-2021-23970)
The vulnerability allows a remote attacker to bypass implemented security restrictions.
The vulnerability exists due to a reachable assertion in multithreaded wasm code, when validating separation of script domains. A remote attacker can create a specially crafted web page, trick the victim into visiting it, trigger an assertion failure and bypass implemented security restrictions.
5) Security features bypass (CVE-ID: CVE-2021-23971)
The vulnerability allows a remote attacker to gain access to sensitive information.
The vulnerability exists due to an error when processing a redirect with a conflicting Referrer-Policy. The browser adopts redirect's Referrer-Policy, which may result in disclosure of more information than intended by the original origin.
6) Spoofing attack (CVE-ID: CVE-2021-23972)
The vulnerability allows a remote attacker to perform spoofing attack.
The vulnerability exists due to incorrect processing of cached redirects with HTTP authentication. A remote attacker can force the browser not to display a phishing warning dialog, if the malicious website was previously cached by the browser.
7) Information disclosure (CVE-ID: CVE-2021-23973)
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to excessive data output via a decoding error, when trying to load a cross-origin resource in an audio/video context. A remote attacker can gain access to information about the resource.
8) Cross-site scripting (CVE-ID: CVE-2021-23974)
The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.
The vulnerability exists due to insufficient sanitization of user-supplied data. The DOMParser API did not properly process <noscript> elements for escaping. A remote attacker can bypass HTML Sanitizer and perform XSS attacks.
9) Resource management error (CVE-ID: CVE-2021-23975)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The developer page about:memory has a Measure function for exploring what object types the browser has allocated and their sizes. When this function was invoked, the browser called the sizeof function instead of using the API method that checks for invalid pointers.
10) Security restrictions bypass (CVE-ID: CVE-2021-23976)
The vulnerability allows a local application to escalate privileges on the system.
When accepting a malicious intent from other installed apps, Firefox for Android accepted manifests from arbitrary file paths and allowed declaring webapp manifests for other origins. This could be used to gain fullscreen access for UI spoofing and could also lead to cross-origin attacks on targeted websites.
11) Race condition (CVE-ID: CVE-2021-23977)
The vulnerability allows a malicious application to read sensitive information.
The vulnerability exists due to a race condition. A local application can read sensitive data from Firefox directories.
12) Buffer overflow (CVE-ID: CVE-2021-23978)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error when processing HTML content. A remote attacker can create a specially crafted webpage, trick the victim into opening it, trigger memory corruption and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
13) Out-of-bounds read (CVE-ID: CVE-2021-23981)
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to a boundary condition during texture upload of a Pixel Buffer Object in WebGL. A remote attacker can create a specially crafted web page, trick the victim into opening it, trigger out-of-bounds read error and read contents of memory on the system.
14) Information disclosure (CVE-ID: CVE-2021-23982)
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to the way Firefox handles requests to internal hosts. Using techniques that built on the slipstream research, a malicious webpage could have scanned both an internal network's hosts as well as services running on the user's local machine utilizing WebRTC connections.
15) Buffer overflow (CVE-ID: CVE-2021-23983)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error when processing transitions for invalid "::marker" properties by causing a transition on a parent node by removing a CSS rule. A remote attacker can create a specially crafted web page, trick the victim into opening it, trigger memory corruption and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
16) Spoofing attack (CVE-ID: CVE-2021-23984)
The vulnerability allows a remote attacker to perform spoofing attack.
The vulnerability exists due to incorrect processing of user-supplied data. A malicious extension could have opened a popup window lacking an address bar. The title of the popup lacking an address bar should not be fully controllable, but in this situation was. This could have been used to spoof a website and attempt to trick the user into providing credentials.
17) Security restrictions bypass (CVE-ID: CVE-2021-23985)
The vulnerability allows a local user to gain access to sensitive information.
The vulnerability exists due to application does not properly impose security restrictions. If an attacker is able to alter specific about:config values (for example malware running on the user's computer), the Devtools remote debugging feature could have been enabled in a way that was unnoticable to the user. This would have allowed a remote attacker (able to make a direct network connection to the victim) to monitor the user's browsing activity and (plaintext) network traffic. This was addressed by providing a visual cue when Devtools has an open network socket.
18) Security restrictions bypass (CVE-ID: CVE-2021-23986)
The vulnerability allows a remote attacker to bypass implemented security restrictions.
The vulnerability exists due to application does not properly impose security restrictions. A malicious extension with the 'search' permission could have installed a new search engine whose favicon referenced a cross-origin URL. The response to this cross-origin request could have been read by the extension, allowing a same-origin policy bypass by the extension, which should not have cross-origin permissions. This cross-origin request was made without cookies, so the sensitive information disclosed by the violation was limited to local-network resources or resources that perform IP-based authentication.
19) Buffer overflow (CVE-ID: CVE-2021-23987)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error when processing HTML content. A remote attacker can create a specially crafted website, trick the victim into opening it, trigger memory corruption and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
20) Buffer overflow (CVE-ID: CVE-2021-23988)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error when processing HTML content. A remote attacker can create a specially crafted website, trick the victim into opening it, trigger memory corruption and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
21) Out-of-bounds write (CVE-ID: CVE-2021-23994)
The vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to a boundary error when processing untrusted input within the WebGL framebuffer. A remote attacker can create a specially crafted web page, trick the victim into opening it using the affected software, trigger out-of-bounds write and execute arbitrary code on the target system.
22) Use-fater-free (CVE-ID: CVE-2021-23995)
The vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to a boundary error when processing untrusted input, when Responsive Design Mode is enabled. A remote attacker can create a specially crafted web page, trick the victim into opening it using the affected software, trigger a use-after-fee error and execute arbitrary code on the target system.
23) Insecure Inherited Permissions (CVE-ID: CVE-2021-23998)
the vulnerability allows a remote attacker to perform spoofing attack.
The vulnerability exists due to the way HTTP pages inherit a secure lock icon, when navigating from an HTTP page. A remote attacker can create a specially crafted webpage that through a series of complicated navigation will force the browser to display a secure lock icon on an unencrypted HTTP page.
24) Insecure Inherited Permissions (CVE-ID: CVE-2021-23999)
the vulnerability allows a remote attacker to perform spoofing attack.
The vulnerability exists due to the way Firefox handles Blob URLs. If a Blob URL was loaded through some unusual user interaction, it could have been loaded by the System Principal and granted additional privileges that should not be granted to web content.
25) Input validation error (CVE-ID: CVE-2021-24002)
The vulnerability allows a remote attacker to bypass implemented security restrictions.
The vulnerability exists due to insufficient validation of user-supplied input when processing newline characters in an FTP URL (such as %0A and %0D). A remote attacker can trick the victim to click on a specially crafted URL and execute arbitrary FTP commands on a remote server, given that victim has access to the FTP server.
26) Incorrect calculation (CVE-ID: CVE-2021-29945)
The vulnerability allows a remote attacker to crash the application.
The vulnerability exists due to the WebAssembly JIT miscalculates the size of a return type, which leads to a null read. A remote attacker can create a specially crafted web page, trick the victim into visiting it and crash the browser.
Note, the vulnerability affects 32-bit platforms only.
27) Input validation error (CVE-ID: CVE-2021-29946)
The vulnerability allows a remote attacker to bypass implemented security restrictions.
The vulnerability exists due to insufficient validation of user-supplied input. Ports that were written as an integer overflow above the bounds of a 16-bit integer could have bypassed port blocking restrictions when used in the Alt-Svc header.
Remediation
Install update from vendor's website.