Medium severity · published Jun 8, 2021
CVE-2021-31807
An issue was discovered in Squid before 4.15 and 5.x before 5.0.6
6.5
CVSS
15.6%
EPSS
No
On KEV
Description
An issue was discovered in Squid before 4.15 and 5.x before 5.0.6. An integer overflow problem allows a remote server to achieve Denial of Service when delivering responses to HTTP Range requests. The issue trigger is a header that can be expected to exist in HTTP traffic without any malicious intent.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)15.6% · higher than 97% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CM
Cloud Manager · Netapp
All versions, or not specified · source: NVD
FE
Fedora · Fedoraproject
33; 34 · source: NVD
SQ
Squid · Squid-cache
3.0 before 4.15; 5.0 before 5.0.6; 2.5.stable2; 2.5.stable3; 2.5.stable4; 2.5.stable5; +19 more · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-31807
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-31807
Mailing List
http://seclists.org/fulldisclosure/2023/Oct/14
Mailing List
http://www.openwall.com/lists/oss-security/2023/10/11/3
Patch
http://www.squid-cache.org/Versions/v4/changesets/squid-4-e7cf864f938f24eea8af0692c04d16790983c823.patch
Third Party Advisory
https://github.com/squid-cache/squid/security/advisories/GHSA-pxwq-f3qr-w2xf
Mailing List
https://lists.debian.org/debian-lts-announce/2021/06/msg00014.html
lists.fedoraproject.org
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LSQ3U54ZCNXR44QRPW3AV2VCS6K3TKCF/
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