CVE-2019-18679

Description

An issue was discovered in Squid 2.x, 3.x, and 4.x through 4.8. Due to incorrect data management, it is vulnerable to information disclosure when processing HTTP Digest Authentication. Nonce tokens contain the raw byte value of a pointer that sits within heap memory allocation. This information reduces ASLR protections and may aid attackers isolating memory areas to target for remote code execution attacks.

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 68.58% Top 5%
Vendor Advisory ubuntu.com Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory gentoo.org Vendor Advisory debian.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://github.com/squid-cache/squid/pull/491 third party advisory patch
https://bugzilla.suse.com/show_bug.cgi?id=1156324 third party advisory issue tracking
http://www.squid-cache.org/Advisories/SQUID-2019_11.txt third party advisory
http://www.squid-cache.org/Versions/v4/changesets/squid-4-671ba97abe929156dc4c717ee52ad22fba0f7443.patch release notes
https://usn.ubuntu.com/4213-1/ third party advisory vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UEMOYTMCCFWK5NOXSXEIH5D2VGWVXR67/ vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MTM74TU2BSLT5B3H4F3UDW53672NVLMC/ vendor advisory
https://lists.debian.org/debian-lts-announce/2019/12/msg00011.html third party advisory mailing list
https://security.gentoo.org/glsa/202003-34 vendor advisory
https://www.debian.org/security/2020/dsa-4682 vendor advisory
https://lists.debian.org/debian-lts-announce/2020/07/msg00009.html mailing list

Frequently Asked Questions

What is the severity of CVE-2019-18679?
CVE-2019-18679 has been scored as a high severity vulnerability.
How to fix CVE-2019-18679?
To fix CVE-2019-18679, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2019-18679 being actively exploited in the wild?
It is possible that CVE-2019-18679 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~69% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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