This security advisory describes one low risk vulnerability.

1) Resource management error

Severity: Low

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

CVE-ID:
N/A

CWE-ID:
CWE-399 – Resource Management Errors

Exploit availability:
No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to improper input validation when parsing style attrbitues. A remote attacker can create a specially crafted web page that can result in regular expression denial of service (ReDoS).

Mitigation

Install updates from vendor’s website.

Vulnerable software versions

Bleach:
2.1, 2.1.1, 2.1.2, 2.1.3, 2.1.4, 3.0.0, 3.0.1, 3.0.2, 3.1.0, 3.1.1, 3.1.2, 3.1.3

CPE
External links

https://github.com/mozilla/bleach/releases/tag/v3.1.4
https://bugzilla.mozilla.org/show_bug.cgi?id=1623633

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.





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