SB2024010237 - Red Hat Enterprise Linux 9.2 Extended Update Support update for thunderbird
Published: January 2, 2024
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 11 secuirty vulnerabilities.
1) Heap-based buffer overflow (CVE-ID: CVE-2023-6856)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error within the WebGL DrawElementsInstanced method when used on systems with the Mesa VM driver. A remote attacker can trick the victim to visit a specially crafted website, trigger a heap-based buffer overflow and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
2) Buffer overflow (CVE-ID: CVE-2023-6864)
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.
3) Spoofing attack (CVE-ID: CVE-2023-50761)
The vulnerability allows a remote attacker to perform spoofing attack.
The vulnerability exists due to incorrect processing of user-supplied data. The signature of a digitally signed S/MIME email message may optionally specify the signature creation date and time. If present, Thunderbird did not compare the signature creation date with the message date and time, and displayed a valid signature despite a date or time mismatch. This could be used to give recipients the impression that a message was sent at a different date or time.
4) Spoofing attack (CVE-ID: CVE-2023-50762)
The vulnerability allows a remote attacker to spoof email content.
The vulnerability exists due to incorrect processing of user-supplied data. When processing a PGP/MIME payload that contains digitally signed text, the first paragraph of the text was never shown to the user. This is because the text was interpreted as a MIME message and the first paragraph was always treated as an email header section. A digitally signed text from a different context, such as a signed GIT commit, could be used to spoof an email message.
5) Buffer Underwrite ('Buffer Underflow') (CVE-ID: CVE-2023-6857)
The vulnerability allows a local user to gain access to sensitive information.
The vulnerability exists due to an error when handling symbolic links. A local user can trigger a race when the browser resolves a symbolic link, where the buffer passed to readlink may actually be smaller than necessary. A local user can gain access to potentially sensitive information.
The vulnerability affects Unix based operating systems only (e.g. Android, Linux, MacOS).
6) Heap-based buffer overflow (CVE-ID: CVE-2023-6858)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a boundary error in nsTextFragment when handling out-of-memory situations. A remote attacker can trick the victim to visit a specially crafted website, trigger a heap overflow and crash the browser.
7) Use-after-free (CVE-ID: CVE-2023-6859)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a use-after-free error in PR_GetIdentitiesLayer when creating the TLS socket. A remote attacker can trick the victim to visit a specially crafted website and crash the browser.
8) Security features bypass (CVE-ID: CVE-2023-6860)
The vulnerability allows a remote attacker to bypass implemented security restrictions.
The vulnerability exists due to VideoBridge lack of texture validation. A remote attacker can trick the victim to open a specially crafted website, escape the sandbox and gain access to sensitive information.
9) Heap-based buffer overflow (CVE-ID: CVE-2023-6861)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error within the nsWindow::PickerOpen(void) method when the browser is running in headless mode. A remote attacker can trick the victim to visit a specially crafted website, trigger a heap-based buffer overflow and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
10) Use-after-free (CVE-ID: CVE-2023-6862)
The vulnerability allows a remote attacker to crash the browser.
The vulnerability exists due to a use-after-free error in nsDNSService::Init during browser startup. A remote attacker with control over the DNS server can cause the browser to crash.
11) Reliance on undefined behavior (CVE-ID: CVE-2023-6863)
The vulnerability allows a remote attacker to perform a denial of service attack.
The vulnerability exists due to reliance on undefined behavior in ShutdownObserver(). A remote attacker can crash the browser.
Remediation
Install update from vendor's website.