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 message.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (5.16%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 5.16% probability · 92th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-667
- Affected
- squid-cache/squid · canonical/ubuntu linux · debian/debian linux · fedoraproject/fedora · opensuse/leap
- Source
- cve@mitre.org
References
- http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00012.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00017.htmlMailing List, Third Party Advisory
- http://www.squid-cache.org/Versions/v4/changesets/SQUID-2020_9.patchPatch, Vendor Advisory
- https://github.com/squid-cache/squid/security/advisories/GHSA-vvj7-xjgq-g2jgThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/10/msg00005.htmlMailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BE6FKUN7IGTIR2MEEMWYDT7N5EJJLZI2/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BMTFLVB7GLRF2CKGFPZ4G4R5DIIPHWI3/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HJJDI7JQFGQLVNCKMVY64LAFMKERAOK7/
- https://security.netapp.com/advisory/ntap-20210219-0007/Third Party Advisory
- https://security.netapp.com/advisory/ntap-20210226-0006/Third Party Advisory
- https://security.netapp.com/advisory/ntap-20210226-0007/Broken Link
- https://usn.ubuntu.com/4477-1/Third Party Advisory
- https://usn.ubuntu.com/4551-1/Third Party Advisory
- https://www.debian.org/security/2020/dsa-4751Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00012.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00017.htmlMailing List, Third Party Advisory
- http://www.squid-cache.org/Versions/v4/changesets/SQUID-2020_9.patchPatch, Vendor Advisory
- https://github.com/squid-cache/squid/security/advisories/GHSA-vvj7-xjgq-g2jgThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/10/msg00005.htmlMailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BE6FKUN7IGTIR2MEEMWYDT7N5EJJLZI2/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BMTFLVB7GLRF2CKGFPZ4G4R5DIIPHWI3/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HJJDI7JQFGQLVNCKMVY64LAFMKERAOK7/
- https://security.netapp.com/advisory/ntap-20210219-0007/Third Party Advisory
- https://security.netapp.com/advisory/ntap-20210226-0006/Third Party Advisory
- https://security.netapp.com/advisory/ntap-20210226-0007/Broken Link
- https://usn.ubuntu.com/4477-1/Third Party Advisory
- https://usn.ubuntu.com/4551-1/Third Party Advisory
- https://www.debian.org/security/2020/dsa-4751Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.