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CVE-2018-19132

23
FAUCET Score

CVE-2018-19132 describes a denial-of-service vulnerability affecting Squid versions prior to 4.4, specifically when SNMP is enabled. An unauthenticated attacker can trigger a memory leak by sending a specially crafted SNMP packet, leading to service disruption. This medium-severity vulnerability (CVSS 5.9) has a high attack complexity but does not require user interaction or privileges. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 4.4CPE matchmatch criteria
cpe:2.3:a:squid-cache:squid:*:*:*:*:*:*:*:*
8.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

5.9MEDIUM

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
2.2
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
6.11%
Probability of exploitation in next 30 days
EPSS Percentile
92.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0611 is in the 91st percentile among its peer group of 19,958 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

github_advisorypatch availablevia nvd_reference
View patch
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: squid34
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: squid

Vendor Advisories (1)

redhatCVE-2018-19132Moderate

squid: Memory leak in SNMP query rejection code

Oct 31, 2018

References

github.com / squid-cache/squid/pull/313
PatchThird Party Advisory
lists.debian.org / debian-lts-announce/2018/11/msg00032.html
Mailing ListThird Party Advisory
lists.debian.org / debian-lts-announce/2020/07/msg00009.html
usn.ubuntu.com / 4059-1
squid-cache.org / Advisories/SQUID-2018_5.txt
MitigationVendor Advisory
squid-cache.org / Versions/v5/changesets/squid-5-644131ff1e00c1895d77561f561d29c104ba6b11.patch
PatchVendor Advisory