Denial of service in Squid
| Risk | Low |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2020-24606 |
| CWE-ID | CWE-400 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
Squid Server applications / IDS/IPS systems, Firewalls and proxy servers |
| Vendor | Squid-cache.org |
Security Bulletin
This security bulletin contains information about 1 vulnerabilities.
Updated: 25.08.2020
Assigned CVE-ID and updated vulnerability description.
1) Resource exhaustion
EUVDB-ID: #VU45957
Risk: Low
CVSSv3.1: 5.1 [CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2020-24606
CWE-ID:
CWE-400 - Resource exhaustion
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to application does not properly EOF in peerDigestHandleReply() function in peer_digest.cc when processing Cache Digest response messages from a trusted peer. A remote attacker who controls a trusted peer can consume all available CPU cycles and perform a denial of service (DoS) attack.
This attack is limited to Squid using cache_peer with cache digests feature.
MitigationInstall updates from vendor's website.
Vulnerable software versionsSquid: 3.0 - 5.0.3
External linkshttp://github.com/squid-cache/squid/security/advisories/GHSA-vvj7-xjgq-g2jg/
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote authenticated privileged user via the Internet.
How the attacker can exploit this vulnerability?
The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
