Multiple vulnerabilities in Mozilla Firefox and Firefox ESR



Published: 2019-03-22 | Updated: 2023-04-27
Risk High
Patch available YES
Number of vulnerabilities 2
CVE-ID CVE-2019-9810
CVE-2019-9813
CWE-ID CWE-119
CWE-843
Exploitation vector Network
Public exploit Vulnerability #1 is being exploited in the wild.
Public exploit code for vulnerability #2 is available.
Vulnerable software
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Firefox ESR
Client/Desktop applications / Web browsers

Mozilla Firefox
Client/Desktop applications / Web browsers

Vendor Mozilla

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Buffer overflow

EUVDB-ID: #VU18061

Risk: High

CVSSv3.1: 8.4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C]

CVE-ID: CVE-2019-9810

CWE-ID: CWE-119 - Memory corruption

Exploit availability: Yes

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 incorrect information alias in IonMonkey JIT compiler for Array.prototype.slice method. A remote attacker can create a specially crafted web page, trick the victim into visiting 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

Install updates from vendor's website.

Vulnerable software versions

Firefox ESR: 60.0.1 - 60.6.0

Mozilla Firefox: 61.0 - 66.0

External links

http://www.mozilla.org/en-US/security/advisories/mfsa2019-09/
http://www.mozilla.org/en-US/security/advisories/mfsa2019-10/
http://bugzilla.mozilla.org/show_bug.cgi?id=1537924


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to visit a specially crafted website.

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.

2) Type Confusion

EUVDB-ID: #VU18062

Risk: High

CVSSv3.1: 7.9 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2019-9813

CWE-ID: CWE-843 - Type confusion

Exploit availability: Yes

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 handling proto mutations in IonMonkey JIT code. 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

Install updates from vendor's website.

Vulnerable software versions

Firefox ESR: 60.0 - 60.6.0

Mozilla Firefox: 61.0 - 66.0

External links

http://www.mozilla.org/en-US/security/advisories/mfsa2019-09/
http://www.mozilla.org/en-US/security/advisories/mfsa2019-10/
http://bugzilla.mozilla.org/show_bug.cgi?id=1538006


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to visit a specially crafted website.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.



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