Squid-Cache: >> Squid >> 4.0.24 Security Vulnerabilities
An issue was discovered in Squid 3.3.9 through 3.5.28 and 4.x through 4.7. When Squid is configured to use Digest authentication, it parses the header Proxy-Authorization. It searches for certain tokens such as domain, uri, and qop. Squid checks if this token's value starts with a quote and ends with one. If so, it performs a memcpy of its length minus 2. Squid never checks whether the value is just a single quote (which would satisfy its requirements), leading to a memcpy of its length minus 1.
CVSS Score
9.8
EPSS Score
0.552
Published
2019-07-11
An issue was discovered in Squid 4.0.23 through 4.7. When checking Basic Authentication with HttpHeader::getAuth, Squid uses a global buffer to store the decoded data. Squid does not check that the decoded length isn't greater than the buffer, leading to a heap-based buffer overflow with user controlled data.
CVSS Score
8.8
EPSS Score
0.124
Published
2019-07-11
An issue was discovered in Squid 2.x through 2.7.STABLE9, 3.x through 3.5.28, and 4.x through 4.7. When Squid is configured to use Basic Authentication, the Proxy-Authorization header is parsed via uudecode. uudecode determines how many bytes will be decoded by iterating over the input and checking its table. The length is then used to start decoding the string. There are no checks to ensure that the length it calculates isn't greater than the input buffer. This leads to adjacent memory being decoded as well. An attacker would not be able to retrieve the decoded data unless the Squid maintainer had configured the display of usernames on error pages.
CVSS Score
5.9
EPSS Score
0.162
Published
2019-07-11
The cachemgr.cgi web module of Squid through 4.7 has XSS via the user_name or auth parameter.
CVSS Score
6.1
EPSS Score
0.795
Published
2019-07-05
Squid before 4.4 has XSS via a crafted X.509 certificate during HTTP(S) error page generation for certificate errors.
CVSS Score
6.1
EPSS Score
0.068
Published
2018-11-09
Squid before 4.4, when SNMP is enabled, allows a denial of service (Memory Leak) via an SNMP packet.
CVSS Score
5.9
EPSS Score
0.113
Published
2018-11-09
Page 6