CVE-2020-8449: canonical ubuntu_linux Exposure of Resource to Wrong Sphere
CVSS: 7.5v3.1HighModified
AliasesALPINE-CVE-2020-8449UBUNTU-CVE-2020-8449DEBIAN-CVE-2020-8449
Published 04-02-2020Last modified 04-08-2024
Vulnerability summary
CVE-2020-8449 is a high (CVSS 7.5) Exposure of Resource to Wrong Sphere vulnerability in canonical ubuntu_linux. EPSS estimates a 8.31% chance of exploitation in the next 30 days, higher than 94.8% of scored vulnerabilities.
CVSS score
7.5/10
010
High · v3.1 (NVD)EPSS score
8.31%
0%100%
Low · 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 13 · Related 8Timeline
- 04-02-2020PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
An issue was discovered in Squid before 4.10. Due to incorrect input validation, it can interpret crafted HTTP requests in unexpected ways to access server resources prohibited by earlier security filters.
CVSS metrics
5 scores · 4 sources · 2 versionsHigh 7.5Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:NSourcesAll 4 agree
- OSV · AlpineEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- OSV · DebianEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Medium 5.0Preferred score · NVD (NIST)
AV:N/AC:L/Au:N/C:P/I:N/A:NSourcesSingle source
EPSS trend
Probability
8.31%
Chance of exploitation in the next 30 days
Percentile
95%
Versus all other CVEs
30-day change
0.00 pp
From 8.31% on 18-09-2026
18-09-202618-10-2026
EPSS score8.31%
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