SB2021081008 - Multiple vulnerabilities in Mozilla Firefox
Published: August 10, 2021
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 11 secuirty vulnerabilities.
1) Buffer overflow (CVE-ID: CVE-2021-29986)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a race condition in getaddrinfowhen resolving DNS names. 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.
Note, the vulnerability affects Linux systems only.
2) Input validation error (CVE-ID: CVE-2021-29981)
The vulnerability allows a remote attacker to compromise the affected system.
The vulnerability exists due to insufficient validation of user-supplied input when lowering/register allocation during live range splitting. A remote attacker can create a specially crafted web page, trick the victim into visiting it, trigger register confusion failures in JITted code and execute arbitrary code on the system.
3) Out-of-bounds read (CVE-ID: CVE-2021-29988)
The vulnerability allows a remote attacker to compromise the affected system.
The vulnerability exists due to a boundary condition when treating inline list-item element as a block element. A remote attacker can create a specially crafted web page, trick the victim into opening it, trigger an out-of-bounds read error and execute arbitrary code on the system.
4) Resource management error (CVE-ID: CVE-2021-29983)
The vulnerability allows a remote attacker to perform clickjacking attack.
The vulnerability exists due to improper management of internal resources within the application. Firefox for Android can get stuck in fullscreen mode and not exit it
even after normal interactions that should cause it to exit. A remote attacker can abuse this to trick the victim into revealing sensitive information.
5) Buffer overflow (CVE-ID: CVE-2021-29984)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error when performing JIT optimization. A remote attacker can trigger memory corruption and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
6) Memory corruption (CVE-ID: CVE-2021-29980)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error in a canvas object. A remote attacker can trigger memory corruption and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
7) Use-after-free (CVE-ID: CVE-2021-29985)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a use-after-free error in media channels within the MediaCacheStream::NotifyDataReceived method. A remote attacker can trick the victim to open a specially crafted web page, trigger a use-after-free error and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
8) Buffer overflow (CVE-ID: CVE-2021-29989)
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 trigger memory corruption and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
9) Insufficient UI Warning of Dangerous Operations (CVE-ID: CVE-2021-29987)
The vulnerability allows a remote attacker to bypass implemented security restrictions.
The vulnerability exists due to the way Firefox displays permission panels. After requesting multiple permissions, and closing the first permission panel, subsequent permission panels will be displayed in a different position but still record a click in the default location, making it possible to trick a user into accepting a permission they did not want to.
Note, the vulnerability affects Linux installations only.
10) Type Confusion (CVE-ID: CVE-2021-29982)
The vulnerability allows a remote attacker to gain access to sensitive information.
The vulnerability exists due to incorrect JIT optimization and a type confusion error. A remote attacker can trick the victim to open a specially crafted web page and read a single bit of memory.
11) Buffer overflow (CVE-ID: CVE-2021-29990)
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.
Remediation
Install update from vendor's website.