SB20200903128 - Ubuntu update for firefox
Published: September 3, 2020 Updated: April 23, 2025
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 8 secuirty vulnerabilities.
1) Resource management error (CVE-ID: CVE-2020-15664)
The vulnerability allows a remote attacker to bypass certain security restrictions.
The vulnerability exists due to the way Firefox handles prompts. By holding a reference to the eval() function from an
about:blank window, a malicious webpage could have gained access to the
InstallTrigger object which would allow them to prompt the user to
install an extension. Combined with user confusion, this could result in
an unintended or malicious extension being installed.
2) Spoofing attack (CVE-ID: CVE-2020-15665)
The vulnerability allows a remote attacker to perform spoofing attack.
The vulnerability exists due to Firefox does not reset the address bar after the beforeunload dialog is shown if the
user chooses to remain on the page. As a result, an incorrect URL is shown in the address bar.
3) Information disclosure (CVE-ID: CVE-2020-15666)
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to excessive data output in an MediaError message. When trying to load a non-video in an audio/video context the exact status code (200, 302, 404, 500, 412, 403, etc.) was disclosed via the MediaError Message. This level of information leakage is inconsistent with the standardized onerror/onsuccess disclosure and can lead to inferring login status to services or device discovery on a local network among other attacks.
4) Buffer overflow (CVE-ID: CVE-2020-15670)
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 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.
5) Use of a broken or risky cryptographic algorithm (CVE-ID: CVE-2020-12400)
The vulnerability allows a local user to gain access to sensitive information.
The vulnerability exists in Mozilla NSS library in the way P-384 and P-521 curves are used in the generation of EDSA signatures, leaking partial information about the ECDSA nonce. Given a small number of ECDSA signatures, this information can be used to steal the private key.
6) Use of a broken or risky cryptographic algorithm (CVE-ID: CVE-2020-12401)
The vulnerability allows a local user to gain access to sensitive information.
The vulnerability exists due to usage of ECDSA signatures. A local user can perform a side channel attack and gain access to sensitive information.
7) Cryptographic issues (CVE-ID: CVE-2020-6829)
The vulnerability allows a remote attacker to gain access to sensitive information.
The vulnerability exists due to usage of wNAF point multiplication algorithm when performing EC scalar point multiplication, which leaked partial information about the nonce used during signature generation. A remote attacker can perform an electro-magnetic side-channel attack and recover the private key.
8) Race condition (CVE-ID: CVE-2020-15668)
The vulnerability allows a remote attacker to gain access to sensitive information.
The vulnerability exists due to a race condition when reading certification information during certificate import. A remote attacker can exploit the race and gain gain access to potentially sensitive data.
Remediation
Install update from vendor's website.