High severity · published Nov 26, 2019
CVE-2019-18679
An issue was discovered in Squid 2.x, 3.x, and 4.x through 4.8
7.5
CVSS
41%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)41.0% · higher than 99% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DL
Debian Linux · Debian
8.0 · source: NVD
FE
Fedora · Fedoraproject
30; 31 · source: NVD
SQ
Squid · Squid-cache
2.0 through 2.7; 3.0 through 3.5.28; 4.0 through 4.8; 2.7; 2.7; 2.7; +5 more · source: NVD
UL
Ubuntu Linux · Canonical
16.04; 18.04; 19.04; 19.10 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-18679
CVE.org
https://www.cve.org/CVERecord?id=CVE-2019-18679
Third Party Advisory
http://www.squid-cache.org/Advisories/SQUID-2019_11.txt
Release Notes
http://www.squid-cache.org/Versions/v4/changesets/squid-4-671ba97abe929156dc4c717ee52ad22fba0f7443.patch
Issue Tracking
https://bugzilla.suse.com/show_bug.cgi?id=1156324
Patch
https://github.com/squid-cache/squid/pull/491
Third Party Advisory
https://lists.debian.org/debian-lts-announce/2019/12/msg00011.html
lists.debian.org
https://lists.debian.org/debian-lts-announce/2020/07/msg00009.html
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