High severity · published Aug 24, 2020
CVE-2020-24606
Squid before 4.13 and 5.x before 5.0.4 allows a trusted peer to perform Denial of Service by consuming all available CPU cycles during handling of a crafted Cache Digest response…
7.5
CVSS
5%
EPSS
No
On KEV
Description
Squid before 4.13 and 5.x before 5.0.4 allows a trusted peer to perform Denial of Service by consuming all available CPU cycles during handling of a crafted Cache Digest response message. This only occurs when cache_peer is used with the cache digests feature. The problem exists because peerDigestHandleReply() livelocking in peer_digest.cc mishandles EOF.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)5.0% · higher than 92% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DL
Debian Linux · Debian
9.0; 10.0 · source: NVD
FE
Fedora · Fedoraproject
31; 32; 33 · source: NVD
LE
Leap · Opensuse
15.1; 15.2 · source: NVD
SQ
Squid · Squid-cache
3.0 before 4.13; 5.0.1 before 5.0.4 · source: NVD
UL
Ubuntu Linux · Canonical
16.04; 18.04; 20.04 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-24606
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-24606
Mailing List
http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00012.html
Mailing List
http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00017.html
Patch
http://www.squid-cache.org/Versions/v4/changesets/SQUID-2020_9.patch
Third Party Advisory
https://github.com/squid-cache/squid/security/advisories/GHSA-vvj7-xjgq-g2jg
Mailing List
https://lists.debian.org/debian-lts-announce/2020/10/msg00005.html
lists.fedoraproject.org
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BE6FKUN7IGTIR2MEEMWYDT7N5EJJLZI2/
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