Multiple vulnerabilities in Firefox ESR

Published: 2019-02-13
Severity High
Patch available YES
Number of vulnerabilities 3
CVE ID CVE-2018-18356
CVE-2019-5785
CVE-2018-18335
CWE ID CWE-416
CWE-190
CWE-122
Exploitation vector Network
Public exploit N/A
Vulnerable software Firefox ESR Subscribe
Mozilla Firefox
Vendor Mozilla

Security Advisory

1) Use-after-free error

Severity: Low

CVSSv3: 5.7 [CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C] [PCI]

CVE-ID: CVE-2018-18356

CWE-ID: CWE-416 - Use After Free

Description

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The weakness exists due to use-after-free error in Skia when handling malicious input. A remote attacker can trick the victim into visiting a specially crafted website, trigger memory corruption and cause the browser to crash.

Mitigation

Update to Firefox ESR 60.5.1.

Vulnerable software versions

Firefox ESR: 60.0, 60.1.0, 60.2.0, 60.2.1, 60.2.2, 60.4.0, 60.5.0

Mozilla Firefox: ESR 60.0, ESR 60.0.2, ESR 60.1, ESR 60.2, ESR 60.2.1, ESR 60.2.2, ESR 60.3, ESR 60.4, ESR 60.5

CPE External links

https://www.mozilla.org/en-US/security/advisories/mfsa2019-05/

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.

2) Integer overflow

Severity: High

CVSSv3: 7.7 [CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C] [PCI]

CVE-ID: CVE-2019-5785

CWE-ID: CWE-190 - Integer Overflow or Wraparound

Description

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

The vulnerability exists due to integer overflow in the Skia library. A remote attacker can create a specially crafted web page, trick the victim into visiting it, trigger integer overflow and execute arbitrary code on the target system.

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

Mitigation

Update to Firefox ESR 60.5.1.

Vulnerable software versions

Firefox ESR: 60.0, 60.1.0, 60.2.0, 60.2.1, 60.2.2, 60.4.0, 60.5.0

Mozilla Firefox: ESR 60.0, ESR 60.0.2, ESR 60.1, ESR 60.2, ESR 60.2.1, ESR 60.2.2, ESR 60.3, ESR 60.4, ESR 60.5

CPE External links

https://www.mozilla.org/en-US/security/advisories/mfsa2019-05/

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.

3) Heap-based buffer overflow

Severity: High

CVSSv3: 8.3 [CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C] [PCI]

CVE-ID: CVE-2018-18335

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

Description

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

The weakness exists due to heap-based buffer overflow in Skia when handling malicious input. A remote attacker can trick the victim into visiting a specially crafted website, trigger memory corruption and execute arbitrary code with elevated privileges.

Successful exploitation of the vulnerability may result in system compromise.

Mitigation

Update to Firefox ESR 60.5.1.

Vulnerable software versions

Firefox ESR: 60.0, 60.1.0, 60.2.0, 60.2.1, 60.2.2, 60.4.0, 60.5.0

Mozilla Firefox: ESR 60.0, ESR 60.0.2, ESR 60.1, ESR 60.2, ESR 60.2.1, ESR 60.2.2, ESR 60.3, ESR 60.4, ESR 60.5

CPE External links

https://www.mozilla.org/en-US/security/advisories/mfsa2019-05/

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.