CVE-2020-8450
Highsquid3 - security update
Published Jun 7, 2021 · Updated Aug 5, 2026 · Also known as ALPINE-CVE-2020-8450, DEBIAN-CVE-2020-8450, UBUNTU-CVE-2020-8450
Key Facts
Patch immediately- CVE-2020-8450 is a high-severity vulnerability (CVSS 7.3 v3.1) affecting Squid (Squid-Cache), Ubuntu Linux (Canonical), Debian Linux and 9 more products.
- It is not listed in any known-exploited vulnerabilities catalog. No public exploit code is known.
- EPSS estimates a 72% probability of exploitation in the next 30 days.
- Fixed versions are available, including libecap 1.0.1-2.module_el8.6.0+2741+01592ae8, libecap 1.0.1-2.module+el8.3.0+7819+eb7d4ef6, libecap 1.0.1-2.module+el8.4.0+404+316a0dc5.
- Brandefense priority: patch immediately, because it is very likely to be exploited soon.
CVSS v3.1
7.3
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
EPSS (30-day exploit likelihood)
72%
Higher than 99.4% of all scored CVEs
Exploited in the wild
No known
Not in a known-exploited catalog
Public exploit code
None known
Get the full CVE-2020-8450 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
An issue was discovered in Squid before 4.10. Due to incorrect buffer management, a remote client can cause a buffer overflow in a Squid instance acting as a reverse proxy.
Affected Products
97 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| SquidSquid-Cache | See advisory | 4.10 |
| Ubuntu LinuxCanonical | 16.04, 18.04, 19.10 | n/a |
| Debian LinuxDebian | 10.0, 9.0 | n/a |
| FedoraFedoraproject | 30, 31 | n/a |
| LeapOpensuse | 15.1 | n/a |
Patched Releases
libecap
1.0.1-2.module_el8.6.0+2741+01592ae8, 1.0.1-2.module+el8.3.0+7819+eb7d4ef6, 1.0.1-2.module+el8.4.0+404+316a0dc5
libecap-devel
1.0.1-2.module+el8.3.0+7819+eb7d4ef6
rootio-squid
4.10-r0
Squid
3.5.21-26.20.1, 3.5.27-r4, 4.10-1, 4.10-4.6.1, 4.10-5.14.1, 4.10-lp151.2.11.1, 4.10-lp151.2.14.1, 4.10-r0, 4.6-1+deb10u2, 4.9-2ubuntu4, 7:3.5.20-15.amzn2.1.1, 7:3.5.20-17.41.amzn1, 7:3.5.20-17.el7_9.4, 7:4.11-3.module+el8.3.0+7819+eb7d4ef6, 4.10
squid-migration-script
7:3.5.20-15.amzn2.1.1, 7:3.5.20-17.41.amzn1, 7:3.5.20-17.el7_9.4
squid-sysvinit
7:3.5.20-15.amzn2.1.1, 7:3.5.20-17.el7_9.4
squid:4
8030020200828070549.30b713e6
squid3
3.1.23-8.16.37.12.1, 3.5.12-1ubuntu7.10, 3.5.23-5+deb9u2, 3.5.27-1ubuntu1.5
Timeline
Publicly disclosed
Jun 7, 2021
Last updated
Aug 5, 2026
Weakness Type
- CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
- CWE-131 Incorrect Calculation of Buffer Size
- CWE-787 Out-of-bounds Write
References
- advisoryhttp://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-14779
- advisoryhttp://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-14782
- advisoryhttp://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-14803
- advisoryhttp://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-27221
- advisoryopenSUSE-SU-2020:0307
FAQ
Common Questions.
An issue was discovered in Squid before 4.10.
Affected: Squid (Squid-Cache); Ubuntu Linux (Canonical) versions 16.04, 18.04, 19.10; Debian Linux versions 10.0, 9.0, among others. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including libecap 1.0.1-2.module_el8.6.0+2741+01592ae8, libecap 1.0.1-2.module+el8.3.0+7819+eb7d4ef6, libecap 1.0.1-2.module+el8.4.0+404+316a0dc5.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.
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