CVE-2020-24606
High
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.
SeverityHigh
CVSS8.6
Exploit probability—
Product
Squid
PublishedAug 24, 2020
First seenAug 24, 2020
How to fix
Update
- squid-cache squid4.13, 5.0.4 or later
Vendor advisories
- debian.org/security/2020/dsa-4751
- usn.ubuntu.com/4477-1/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HJJDI7JQFGQLVNCKMVY64LAFMKERAOK7/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BMTFLVB7GLRF2CKGFPZ4G4R5DIIPHWI3/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BE6FKUN7IGTIR2MEEMWYDT7N5EJJLZI2/
- usn.ubuntu.com/4551-1/
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| squid-cache squid | 3.0 ≤ v < 4.13, 5.0.1 ≤ v < 5.0.4 | 4.13, 5.0.4 |
| canonical ubuntu_linux | 16.04, 18.04, 20.04 | — |
| debian debian_linux | 9.0, 10.0 | — |
| fedoraproject fedora | 31, 32, 33 | — |
| opensuse leap | 15.1, 15.2 | — |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.