CVE-2020-8450: canonical ubuntu_linux Incorrect Calculation of Buffer Size
CVSS: 7.5v2.0HighModified
AliasesALPINE-CVE-2020-8450UBUNTU-CVE-2020-8450DEBIAN-CVE-2020-8450
Published 04-02-2020Last modified 04-08-2024
Vulnerability summary
CVE-2020-8450 is a high (CVSS 7.5) Incorrect Calculation of Buffer Size vulnerability in canonical ubuntu_linux. EPSS estimates a 71.79% chance of exploitation in the next 30 days, higher than 99.4% of scored vulnerabilities.
CVSS score
7.5/10
010
High · v2.0 (NVD)EPSS score
71.79%
0%100%
Critical · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 12 · Related 7Timeline
- 04-02-2020PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
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.
CVSS metrics
5 scores · 4 sources · 2 versionsHigh 7.3Preferred score · OSV · Alpine (Ecosystem advisory) · calculated from vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:LSourcesAll 4 agree
- OSV · UbuntuEcosystem advisory · calculated7.3HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
- OSV · DebianEcosystem advisory · calculated7.3HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
- NVDNIST7.3HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
High 7.5Preferred score · NVD (NIST)
AV:N/AC:L/Au:N/C:P/I:P/A:PSourcesSingle source
EPSS trend
Probability
71.79%
Chance of exploitation in the next 30 days
Percentile
99%
Versus all other CVEs
30-day change
0.00 pp
From 71.79% on 18-09-2026
18-09-202618-10-2026
EPSS score71.79%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Debian2 products
- squid< 4.10-1
- debian_linuxEOL9.0 | 10.0
Ubuntu2 products
- squid< 4.9-2ubuntu4
- squid3< 3.5.12-1ubuntu7.10 | < 3.5.27-1ubuntu1.5
Alpine1 product
- squid< 4.10-r0 | < 3.5.27-r4
Canonical1 product
- ubuntu_linuxEOL16.04 | 18.04 | 19.10
Fedoraproject1 product
- fedoraEOL30 | 31
Opensuse1 product
- leapEOL15.1
Squid-cache1 product
- squid< 4.10
7 vendors · 9 products
References
20 links- www.squid-cache.org/Versions/v4/changesets/squid-4-d8e4715992d0e530871519549add5519cbac0598.patchX Refsource MISCPatchVendor Advisory
- www.squid-cache.org/Versions/v4/changesets/squid-4-b3a0719affab099c684f1cd62b79ab02816fa962.patchX Refsource MISCPatchVendor Advisory
- www.squid-cache.org/Versions/v3/3.5/changesets/SQUID-2020_1.patchX Refsource MISCPatchVendor Advisory
- lists.opensuse.org/opensuse-security-announce/2020-03/msg00012.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory
Show all 20 references
- lists.opensuse.org/opensuse-security-announce/2020-05/msg00010.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory
- lists.debian.org/debian-lts-announce/2020/07/msg00009.htmlMailing ListX Refsource MLISTThird Party Advisory