Medium severity · published May 16, 2018
CVE-2018-1172
This vulnerability allows remote attackers to deny service on vulnerable installations of The Squid Software Foundation Squid 3.5.27-20180318
5.9
CVSS
8.2%
EPSS
No
On KEV
Description
This vulnerability allows remote attackers to deny service on vulnerable installations of The Squid Software Foundation Squid 3.5.27-20180318. Authentication is not required to exploit this vulnerability. The specific flaw exists within ClientRequestContext::sslBumpAccessCheck(). A crafted request can trigger the dereference of a null pointer. An attacker can leverage this vulnerability to create a denial-of-service condition to users of the system. Was ZDI-CAN-6088.
CVSS vector
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)8.2% · higher than 95% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SQ
Squid · Squid-cache
3.5.27 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2018-1172
CVE.org
https://www.cve.org/CVERecord?id=CVE-2018-1172
Vendor Advisory
http://www.squid-cache.org/Advisories/SQUID-2018_3.txt
Third Party Advisory
https://zerodayinitiative.com/advisories/ZDI-18-309
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