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AUSCERT External Security Bulletin Redistribution
ESB-2021.1938
Security update for squid
4 June 2021
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AusCERT Security Bulletin Summary
---------------------------------
Product: squid
Publisher: SUSE
Operating System: SUSE
Impact/Access: Denial of Service -- Remote with User Interaction
Access Confidential Data -- Remote/Unauthenticated
Unauthorised Access -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2021-31806 CVE-2021-28662 CVE-2021-28652
CVE-2021-28651 CVE-2020-25097
Reference: ESB-2021.1894
ESB-2021.1583
Original Bulletin:
https://www.suse.com/support/update/announcement/2021/suse-su-20211838-1
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TITLE: Security update for squid
URL: https://www.suse.com/support/update/announcement/2021/suse-su-20211838-1
Found CVEs: CVE-2020-25097 CVE-2021-28651 CVE-2021-28652
CVE-2021-28662 CVE-2021-31806
CVE-2020-25097
CVSSv3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
CVSSv3 base score: 8.6
CVSSv2/AV:N/AC:L/Au:N/C:P/I:N/A:N
CVSSv2 base score: 5.0
Source: https://nvd.nist.gov/vuln/detail/CVE-2020-25097/
An issue was discovered in Squid through 4.13 and 5.x through 5.0.4. Due to
improper input validation, it allows a trusted client to perform HTTP Request
Smuggling and access services otherwise forbidden by the security controls. This
occurs for certain uri_whitespace configuration settings.
CVE-2021-28651
Source: https://nvd.nist.gov/vuln/detail/CVE-2021-28651/
An issue was discovered in Squid before 4.15 and 5.x before 5.0.6. Due to a
buffer-management bug, it allows a denial of service. When resolving a request
with the urn: scheme, the parser leaks a small amount of memory. However, there
is an unspecified attack methodology that can easily trigger a large amount of
memory consumption.
CVE-2021-28652
Source: https://nvd.nist.gov/vuln/detail/CVE-2021-28652/
An issue was discovered in Squid before 4.15 and 5.x before 5.0.6. Due to
incorrect parser validation, it allows a Denial of Service attack against the
Cache Manager API. This allows a trusted client to trigger memory leaks that.
over time, lead to a Denial of Service via an unspecified short query string.
This attack is limited to clients with Cache Manager API access privilege.
SUSE Security Update: Security update for squid
______________________________________________________________________________
Announcement ID: SUSE-SU-2021:1838-1
Rating: important
References: #1171164 #1171569 #1183436 #1185916 #1185918 #1185919
#1185921 #1185923
Cross-References: CVE-2020-25097 CVE-2021-28651 CVE-2021-28652 CVE-2021-28662
CVE-2021-31806
Affected Products:
SUSE Linux Enterprise Server 12-SP5
______________________________________________________________________________
An update that solves 5 vulnerabilities and has three fixes is now available.
Description:
This update for squid fixes the following issues:
o update to 4.15:
o CVE-2021-28652: Broken cache manager URL parsing (bsc#1185918)
o CVE-2021-28651: Memory leak in RFC 2169 response parsing (bsc#1185921)
o CVE-2021-28662: Limit HeaderLookupTable_t::lookup() to BadHdr and specific
IDs (bsc#1185919)
o CVE-2021-31806: Handle more Range requests (bsc#1185916)
o CVE-2020-25097: HTTP Request Smuggling vulnerability (bsc#1183436)
o Handle more partial responses (bsc#1185923)
o fix previous change to reinstante permissions macros, because the wrong
path has been used (bsc#1171569).
o use libexecdir instead of libdir to conform to recent changes in Factory
(bsc#1171164).
o Reinstate permissions macros for pinger binary, because the permissions
package is also responsible for setting up the cap_net_raw capability,
currently a fresh squid install doesn't get a capability bit at all (bsc#
1171569).
o Change pinger and basic_pam_auth helper to use standard permissions. pinger
uses cap_net_raw=ep instead (bsc#1171569)
Patch Instructions:
To install this SUSE Security Update use the SUSE recommended installation
methods like YaST online_update or "zypper patch".
Alternatively you can run the command listed for your product:
o SUSE Linux Enterprise Server 12-SP5:
zypper in -t patch SUSE-SLE-SERVER-12-SP5-2021-1838=1
Package List:
o SUSE Linux Enterprise Server 12-SP5 (aarch64 ppc64le s390x x86_64):
squid-4.15-4.18.1
squid-debuginfo-4.15-4.18.1
squid-debugsource-4.15-4.18.1
References:
o https://www.suse.com/security/cve/CVE-2020-25097.html
o https://www.suse.com/security/cve/CVE-2021-28651.html
o https://www.suse.com/security/cve/CVE-2021-28652.html
o https://www.suse.com/security/cve/CVE-2021-28662.html
o https://www.suse.com/security/cve/CVE-2021-31806.html
o https://bugzilla.suse.com/1171164
o https://bugzilla.suse.com/1171569
o https://bugzilla.suse.com/1183436
o https://bugzilla.suse.com/1185916
o https://bugzilla.suse.com/1185918
o https://bugzilla.suse.com/1185919
o https://bugzilla.suse.com/1185921
o https://bugzilla.suse.com/1185923
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