1) Buffer overflow

EUVDB-ID: #VU25860

Risk: High

CVSSv3.1:

CVE-ID: CVE-2020-6815

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

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.

Mitigation

Update the affected package thunderbird to version 68.7.0-1.

Vulnerable software versions

Arch Linux: All versions

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CPE2.3

• cpe:2.3:o:arch_linux:arch_linux:*:*:*:*:*:*:*:*

External links

http://security.archlinux.org/advisory/ASA-202004-12

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

2) Use-after-free

EUVDB-ID: #VU26573

Risk: Critical

CVSSv3.1:

CVE-ID: CVE-2020-6819

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error caused by a race condition running the nsDocShell destructor. A remote attacker can create a specially crafted website, trick the victim into visiting it, 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.

Note, this vulnerability is being actively exploited in the wild in targeted attacks.

Mitigation

Update the affected package thunderbird to version 68.7.0-1.

Vulnerable software versions

Arch Linux: All versions

---

CPE2.3

• cpe:2.3:o:arch_linux:arch_linux:*:*:*:*:*:*:*:*

External links

http://security.archlinux.org/advisory/ASA-202004-12

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

3) Use-after-free

EUVDB-ID: #VU26574

Risk: Critical

CVSSv3.1:

CVE-ID: CVE-2020-6820

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error caused by a race condition handling ReadableStream. A remote attacker can create a specially crafted website, trick the victim into visiting it, 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.

Note, this vulnerability is being actively exploited in the wild in targeted attacks.

Mitigation

Update the affected package thunderbird to version 68.7.0-1.

Vulnerable software versions

Arch Linux: All versions

---

CPE2.3

• cpe:2.3:o:arch_linux:arch_linux:*:*:*:*:*:*:*:*

External links

http://security.archlinux.org/advisory/ASA-202004-12

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

4) Out-of-bounds read

EUVDB-ID: #VU26649

Risk: Medium

CVSSv3.1:

CVE-ID: CVE-2020-6821

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to a boundary condition when using WebGL copyTexSubImage method. 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 uninitialized memory on the system.

Mitigation

Update the affected package thunderbird to version 68.7.0-1.

Vulnerable software versions

Arch Linux: All versions

---

CPE2.3

• cpe:2.3:o:arch_linux:arch_linux:*:*:*:*:*:*:*:*

External links

http://security.archlinux.org/advisory/ASA-202004-12

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?