CVE-2016-3947

Heap-based buffer overflow in the Icmp6::Recv function in icmp/Icmp6.cc in the pinger utility in Squid before 3.5.16 and 4.x before 4.0.8 allows remote servers to cause a denial of service (performance degradation or transition failures) or write sensitive information to log files via an ICMPv6 packet.

Updated squid packages fix security vulnerabilities:

Due to a buffer overrun, the Squid pinger binary in Squid before 3.5.16 is vulnerable to a denial of service or information leak attack when processing ICMPv6 packets. This bug also permits the server response to manipulate other ICMP and ICMPv6 queries processing to cause information leaks (CVE-2016-3947).

Due to incorrect bounds checking, Squid before 3.5.16 is vulnerable to a denial of service attack when processing HTTP responses (CVE-2016-3948).

These are all security issues fixed in the squid-4.16-1.5 package on the GA media of openSUSE Tumbleweed.

The Squid HTTP proxy has been updated to version 3.3.14, fixing the following security issues:

• Fixed multiple Denial of Service issues in HTTP Response processing. (CVE-2016-2569, CVE-2016-2570, CVE-2016-2571, CVE-2016-2572, bsc#968392, bsc#968393, bsc#968394, bsc#968395)
• CVE-2016-3947: Buffer overrun issue in pinger ICMPv6 processing. (bsc#973782)
• CVE-2015-5400: Improper protection of alternate path. (bsc#938715)
• CVE-2015-3455: Squid http proxy configured with client-first SSL bumping did not correctly validate server certificate. (bsc#929493)
• CVE-2016-3948: Fixed denial of service in HTTP Response processing (bsc#973783)
• CVE-2016-4051: fixes buffer overflow in cachemgr.cgi (bsc#976553)
• CVE-2016-4052, CVE-2016-4053, CVE-2016-4054: Fixed multiple issues in ESI processing (bsc#976556)
• CVE-2016-4553: Fixed cache poisoning issue in HTTP Request handling (bsc#979009)
• CVE-2016-4554: Fixed header smuggling issue in HTTP Request processing (bsc#979010)
• Fixed multiple Denial of Service issues in ESI Response processing. (CVE-2016-4555, CVE-2016-4556, bsc#979011, bsc#979008)

Additionally, the following non-security issues have been fixed:

• Fix header size in script unsquid.pl. (bsc#902197)
• Add external helper ext_session_acl to package. (bsc#959290)
• Update forward_max_tries to permit 25 server paths With cloud sites becoming more popular more CDN servers are producing long lists of IPv6 and IPv4 addresses. If there are not enough paths selected the IPv4 ones may never be reached.
• squid.init: wait that squid really dies when we kill it on upgrade instead of proclaiming its demise prematurely (bnc#963539)

This update for squid3 fixes the following issues:

• Multiple issues in pinger ICMP processing. (CVE-2014-7141, CVE-2014-7142)

• CVE-2016-3947: Buffer overrun issue in pinger ICMPv6 processing. (bsc#973782)

• CVE-2016-4554: fix header smuggling issue in HTTP Request processing (bsc#979010)

• Fix multiple Denial of Service issues in HTTP Response processing. (CVE-2016-2569, CVE-2016-2570, CVE-2016-2571, CVE-2016-2572, bsc#968392, bsc#968393, bsc#968394, bsc#968395)

• Regression caused by the DoS fixes above (bsc#993299)

• CVE-2016-3948: Fix denial of service in HTTP Response processing (bsc#973783)

• CVE-2016-4051: fixes buffer overflow in cachemgr.cgi (bsc#976553)

• CVE-2016-4052, CVE-2016-4053, CVE-2016-4054:

  • fixes multiple issues in ESI processing (bsc#976556)

• CVE-2016-4556: fixes double free vulnerability in Esi.cc (bsc#979008)

• CVE-2015-5400: Improper Protection of Alternate Path (bsc#938715)

• CVE-2014-6270: fix off-by-one in snmp subsystem (bsc#895773)

• Memory leak in squid3 when using external_acl (bsc#976708)

Yuriy M. Kaminskiy discovered that the Squid pinger utility incorrectly handled certain ICMPv6 packets. A remote attacker could use this issue to cause Squid to crash, resulting in a denial of service, or possibly cause Squid to leak information into log files. (CVE-2016-3947)

Yuriy M. Kaminskiy discovered that the Squid cachemgr.cgi tool incorrectly handled certain crafted data. A remote attacker could use this issue to cause Squid to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2016-4051)

It was discovered that Squid incorrectly handled certain Edge Side Includes (ESI) responses. A remote attacker could possibly use this issue to cause Squid to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2016-4052, CVE-2016-4053, CVE-2016-4054)

Jianjun Chen discovered that Squid did not correctly ignore the Host header when absolute-URI is provided. A remote attacker could possibly use this issue to conduct cache-poisoning attacks. This issue only affected Ubuntu 14.04 LTS, Ubuntu 15.10 and Ubuntu 16.04 LTS. (CVE-2016-4553)

Jianjun Chen discovered that Squid incorrectly handled certain HTTP Host headers. A remote attacker could possibly use this issue to conduct cache-poisoning attacks. (CVE-2016-4554)

It was discovered that Squid incorrectly handled certain Edge Side Includes (ESI) responses. A remote attacker could possibly use this issue to cause Squid to crash, resulting in a denial of service. (CVE-2016-4555, CVE-2016-4556)