squid-3.5.20-15.el7.1

エラータID: AXSA:2020-050:02

Release date: 
Wednesday, May 6, 2020 - 16:55
Subject: 
squid-3.5.20-15.el7.1
Affected Channels: 
Asianux Server 7 for x86_64
Severity: 
High
Description: 

Squid is a high-performance proxy caching server for web clients, supporting FTP, Gopher, and HTTP data objects.

Security Fix(es):

* squid: improper check for new member in ESIExpression::Evaluate allows for stack buffer overflow (CVE-2019-12519)

* squid: improper access restriction upon Digest Authentication nonce replay could lead to remote code execution (CVE-2020-11945)

* squid: parsing of header Proxy-Authentication leads to memory corruption (CVE-2019-12525)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

CVE-2019-12519
An issue was discovered in Squid through 4.7. When handling the tag esi:when when ESI is enabled, Squid calls ESIExpression::Evaluate. This function uses a fixed stack buffer to hold the expression while it's being evaluated. When processing the expression, it could either evaluate the top of the stack, or add a new member to the stack. When adding a new member, there is no check to ensure that the stack won't overflow.
CVE-2019-12525
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.
CVE-2020-11945
An issue was discovered in Squid before 5.0.2. A remote attacker can replay a sniffed Digest Authentication nonce to gain access to resources that are otherwise forbidden. This occurs because the attacker can overflow the nonce reference counter (a short integer). Remote code execution may occur if the pooled token credentials are freed (instead of replayed as valid credentials).

Solution: 

Update packages.

Additional Info: 

N/A

Download: 

SRPMS
  1. squid-3.5.20-15.el7.1.src.rpm
    MD5: 3a0cba3fa4e5e58e6c9773d263be4237
    SHA-256: 83248215c0209a7b9321fbe7d0efeefacad38b9836c17644bf897b07a7a2f56a
    Size: 2.32 MB

Asianux Server 7 for x86_64
  1. squid-3.5.20-15.el7.1.x86_64.rpm
    MD5: 0a6fad34c9ae1246dc13f2c4996946af
    SHA-256: 493acac79c66ba318e284f02d94f3827dfd0f6b4cebd45a4466c6f7838df2261
    Size: 3.13 MB
  2. squid-migration-script-3.5.20-15.el7.1.x86_64.rpm
    MD5: 7c49371d744b6af20d3ff583fb1df12b
    SHA-256: 308e9c2994fff96dfd78f2101e71c83317d531bd88f7609e852983947291a879
    Size: 48.77 kB