Red Hat Enterprise Linux 8.2 update for firefox
| Risk | High |
| Patch available | YES |
| Number of vulnerabilities | 3 |
| CVE-ID | CVE-2021-29970 CVE-2021-29976 CVE-2021-30547 |
| CWE-ID | CWE-416 CWE-119 CWE-787 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
firefox (Red Hat package) Operating systems & Components / Operating system package or component Red Hat Enterprise Linux Server - TUS Operating systems & Components / Operating system |
| Vendor | Red Hat Inc. |
Security Bulletin
This security bulletin contains information about 3 vulnerabilities.
1) Use-after-free
EUVDB-ID: #VU54678
Risk: High
CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2021-29970
CWE-ID:
CWE-416 - Use After Free
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to a use-after-free error in accessibility features when processing HTML content. A remote attacker can track the victim to open a specially crafted web page, trigger a use-after-free error and execute arbitrary code on the system.
Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.
MitigationInstall updates from vendor's website.
firefox (Red Hat package): 78.2.0-2.el8_2 - 78.11.0-3.el8_2
Red Hat Enterprise Linux Server - TUS: 8.2
CPE2.3- cpe:2.3:o:red_hat:firefox_redhat_package:78.11.0-3.el8_2:*:*:*:*:red_hat_enterprise_linux:*:
- cpe:2.3:o:red_hat:firefox_redhat_package:78.10.0-1.el8_2:*:*:*:*:red_hat_enterprise_linux:*:
- cpe:2.3:o:red_hat:firefox_redhat_package:78.9.0-1.el8_2:*:*:*:*:red_hat_enterprise_linux:*:
- cpe:2.3:o:red_hat:red_hat_enterprise_linux_server_-_tus:8.2:*:*:*:*:red_hat_enterprise_linux:*:
http://access.redhat.com/errata/RHSA-2021:2742
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
2) Buffer overflow
EUVDB-ID: #VU54679
Risk: High
CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2021-29976
CWE-ID:
CWE-119 - Memory corruption
Exploit availability: No
DescriptionThe 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.
MitigationInstall updates from vendor's website.
firefox (Red Hat package): 78.2.0-2.el8_2 - 78.11.0-3.el8_2
Red Hat Enterprise Linux Server - TUS: 8.2
CPE2.3- cpe:2.3:o:red_hat:firefox_redhat_package:78.11.0-3.el8_2:*:*:*:*:red_hat_enterprise_linux:*:
- cpe:2.3:o:red_hat:firefox_redhat_package:78.10.0-1.el8_2:*:*:*:*:red_hat_enterprise_linux:*:
- cpe:2.3:o:red_hat:firefox_redhat_package:78.9.0-1.el8_2:*:*:*:*:red_hat_enterprise_linux:*:
- cpe:2.3:o:red_hat:red_hat_enterprise_linux_server_-_tus:8.2:*:*:*:*:red_hat_enterprise_linux:*:
http://access.redhat.com/errata/RHSA-2021:2742
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
3) Out-of-bounds write
EUVDB-ID: #VU54002
Risk: High
CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2021-30547
CWE-ID:
CWE-787 - Out-of-bounds write
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to a boundary error when processing untrusted HTML content in ANGLE. A remote attacker can create a specially crafted web page, trick the victim into opening it, trigger out-of-bounds write and execute arbitrary code on the target system.
MitigationInstall updates from vendor's website.
firefox (Red Hat package): 78.2.0-2.el8_2 - 78.11.0-3.el8_2
Red Hat Enterprise Linux Server - TUS: 8.2
CPE2.3- cpe:2.3:o:red_hat:firefox_redhat_package:78.11.0-3.el8_2:*:*:*:*:red_hat_enterprise_linux:*:
- cpe:2.3:o:red_hat:firefox_redhat_package:78.10.0-1.el8_2:*:*:*:*:red_hat_enterprise_linux:*:
- cpe:2.3:o:red_hat:firefox_redhat_package:78.9.0-1.el8_2:*:*:*:*:red_hat_enterprise_linux:*:
- cpe:2.3:o:red_hat:red_hat_enterprise_linux_server_-_tus:8.2:*:*:*:*:red_hat_enterprise_linux:*:
http://access.redhat.com/errata/RHSA-2021:2742
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
