Debian update for thunderbird

1) Use of uninitialized resource

EUVDB-ID: #VU48790

Risk: Medium

CVSSv3.1: 4.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-16042

CWE-ID: CWE-908 - Use of Uninitialized Resource

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass certain security restrictions.

The vulnerability exists due to usage of uninitialized resources in V8 in Google Chrome. A remote attacker can trick the victim to visit a specially crafted webpage, trigger uninitialized usage of resources and bypass implemented security mechanisms.

Mitigation

Update thunderbird package to version 1:78.6.0-1~deb10u1.

Vulnerable software versions

thunderbird (Debian package): 60.9.0 - 78.5.1-1~deb10u1

CPE2.3

• cpe:2.3:o:debian:thunderbird_debian_package:78.5.1-1~deb10u1:*:*:*:*:debian_linux:*:
• cpe:2.3:o:debian:thunderbird_debian_package:78.5.1:*:*:*:*:debian_linux:*:
• cpe:2.3:o:debian:thunderbird_debian_package:78.5.1-1:*:*:*:*:debian_linux:*:

External links

http://www.debian.org/security/2020/dsa-4815

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) Heap-based buffer overflow

EUVDB-ID: #VU49013

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-2020-26971

CWE-ID: CWE-122 - Heap-based Buffer Overflow

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 within WebGL component. A remote attacker can create a specially crafted web page, trick the victim into visiting it, trigger 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.

Mitigation

Update thunderbird package to version 1:78.6.0-1~deb10u1.

Vulnerable software versions

thunderbird (Debian package): 60.9.0 - 78.5.1-1~deb10u1

CPE2.3

• cpe:2.3:o:debian:thunderbird_debian_package:78.5.1-1~deb10u1:*:*:*:*:debian_linux:*:
• cpe:2.3:o:debian:thunderbird_debian_package:78.5.1:*:*:*:*:debian_linux:*:
• cpe:2.3:o:debian:thunderbird_debian_package:78.5.1-1:*:*:*:*:debian_linux:*:

External links

http://www.debian.org/security/2020/dsa-4815

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) Input validation error

EUVDB-ID: #VU49015

Risk: Medium

CVSSv3.1: 4.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-26973

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass implemented security restrictions.

The vulnerability exists due to insufficient validation of user-supplied input within CSS Sanitizer. A remote attacker can create a specially crafted web page, trick the victim into visiting it, and bypass implemented security restrictions.

Mitigation

Update thunderbird package to version 1:78.6.0-1~deb10u1.

Vulnerable software versions

thunderbird (Debian package): 60.9.0 - 78.5.1-1~deb10u1

CPE2.3

• cpe:2.3:o:debian:thunderbird_debian_package:78.5.1-1~deb10u1:*:*:*:*:debian_linux:*:
• cpe:2.3:o:debian:thunderbird_debian_package:78.5.1:*:*:*:*:debian_linux:*:
• cpe:2.3:o:debian:thunderbird_debian_package:78.5.1-1:*:*:*:*:debian_linux:*:

External links

http://www.debian.org/security/2020/dsa-4815

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.

4) Type Confusion

EUVDB-ID: #VU49016

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-2020-26974

CWE-ID: CWE-843 - Type confusion

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a type confusion error. When flex-basis was used on a table wrapper, a StyleGenericFlexBasis object could have been incorrectly cast to the wrong type. A remote attacker can create a specially crafted web page, trick the victim into visiting it, trigger a type confusion error and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Update thunderbird package to version 1:78.6.0-1~deb10u1.

Vulnerable software versions

thunderbird (Debian package): 60.9.0 - 78.5.1-1~deb10u1

CPE2.3

• cpe:2.3:o:debian:thunderbird_debian_package:78.5.1-1~deb10u1:*:*:*:*:debian_linux:*:
• cpe:2.3:o:debian:thunderbird_debian_package:78.5.1:*:*:*:*:debian_linux:*:
• cpe:2.3:o:debian:thunderbird_debian_package:78.5.1-1:*:*:*:*:debian_linux:*:

External links

http://www.debian.org/security/2020/dsa-4815

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.

5) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU49020

Risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-26978

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

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

The vulnerability exists due to application does not properly impose security restrictions. A remote attacker can create a specially crafted webpage and send probes to hosts in internal network as well as to services on the user's local machine.

Mitigation

Update thunderbird package to version 1:78.6.0-1~deb10u1.

Vulnerable software versions

thunderbird (Debian package): 60.9.0 - 78.5.1-1~deb10u1

CPE2.3

• cpe:2.3:o:debian:thunderbird_debian_package:78.5.1-1~deb10u1:*:*:*:*:debian_linux:*:
• cpe:2.3:o:debian:thunderbird_debian_package:78.5.1:*:*:*:*:debian_linux:*:
• cpe:2.3:o:debian:thunderbird_debian_package:78.5.1-1:*:*:*:*:debian_linux:*:

External links

http://www.debian.org/security/2020/dsa-4815

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.

6) Information disclosure

EUVDB-ID: #VU49022

Risk: Medium

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-35111

CWE-ID: CWE-200 - Information exposure

Exploit availability: No

Description

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

The vulnerability exists due to the proxy.onRequest API does not use proxy when viewing source code of the web application. A remote attacker, who controls the web server can obtain user's real IP address, if the user decides to view the web application source code while behind a proxy server.

Mitigation

Update thunderbird package to version 1:78.6.0-1~deb10u1.

Vulnerable software versions

thunderbird (Debian package): 60.9.0 - 78.5.1-1~deb10u1

CPE2.3

• cpe:2.3:o:debian:thunderbird_debian_package:78.5.1-1~deb10u1:*:*:*:*:debian_linux:*:
• cpe:2.3:o:debian:thunderbird_debian_package:78.5.1:*:*:*:*:debian_linux:*:
• cpe:2.3:o:debian:thunderbird_debian_package:78.5.1-1:*:*:*:*:debian_linux:*:

External links

http://www.debian.org/security/2020/dsa-4815

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.

7) Buffer overflow

EUVDB-ID: #VU49024

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-2020-35113

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 thunderbird package to version 1:78.6.0-1~deb10u1.

Vulnerable software versions

thunderbird (Debian package): 60.9.0 - 78.5.1-1~deb10u1

CPE2.3

• cpe:2.3:o:debian:thunderbird_debian_package:78.5.1-1~deb10u1:*:*:*:*:debian_linux:*:
• cpe:2.3:o:debian:thunderbird_debian_package:78.5.1:*:*:*:*:debian_linux:*:
• cpe:2.3:o:debian:thunderbird_debian_package:78.5.1-1:*:*:*:*:debian_linux:*:

External links

http://www.debian.org/security/2020/dsa-4815

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.