Signature Detail
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Short Name |
DNS:SQUID-DNS-REPLIES2 |
|---|---|
Severity |
Minor |
Recommended |
No |
Recommended Action |
Drop |
Category |
DNS |
Keywords |
Squid DNS Replies Invalid Free |
Release Date |
2017/03/22 |
Update Number |
2840 |
Supported Platforms |
idp-4.0+, isg-3.0+, j-series-9.5+, mx-11.4+, srx-12.1+, srx-branch-12.1+, vmx-17.4+, vsrx-12.1+, vsrx3bsd-18.2+ |
DNS: Squid DNS Replies Invalid Free
This signature detects attempts to exploit a known vulnerability against Squid while processing certain DNS replies. A successful attack can lead to arbitrary code execution.
Extended Description
The idnsGrokReply function in Squid before 3.1.16 does not properly free memory, which allows remote attackers to cause a denial of service (daemon abort) via a DNS reply containing a CNAME record that references another CNAME record that contains an empty A record.
Affected Products
- Squid-cache squid 3.0
- Squid-cache squid 3.0.stable1
- Squid-cache squid 3.0.stable10
- Squid-cache squid 3.0.stable11
- Squid-cache squid 3.0.stable12
- Squid-cache squid 3.0.stable13
- Squid-cache squid 3.0.stable14
- Squid-cache squid 3.0.stable15
- Squid-cache squid 3.0.stable16
- Squid-cache squid 3.0.stable17
- Squid-cache squid 3.0.stable18
- Squid-cache squid 3.0.stable19
- Squid-cache squid 3.0.stable2
- Squid-cache squid 3.0.stable20
- Squid-cache squid 3.0.stable21
- Squid-cache squid 3.0.stable22
- Squid-cache squid 3.0.stable23
- Squid-cache squid 3.0.stable24
- Squid-cache squid 3.0.stable25
- Squid-cache squid 3.0.stable3
- Squid-cache squid 3.0.stable4
- Squid-cache squid 3.0.stable5
- Squid-cache squid 3.0.stable6
- Squid-cache squid 3.0.stable7
- Squid-cache squid 3.0.stable8
- Squid-cache squid 3.0.stable9
- Squid-cache squid 3.1
- Squid-cache squid 3.1.0.1
- Squid-cache squid 3.1.0.10
- Squid-cache squid 3.1.0.11
- Squid-cache squid 3.1.0.12
- Squid-cache squid 3.1.0.13
- Squid-cache squid 3.1.0.14
- Squid-cache squid 3.1.0.15
- Squid-cache squid 3.1.0.16
- Squid-cache squid 3.1.0.17
- Squid-cache squid 3.1.0.18
- Squid-cache squid 3.1.0.2
- Squid-cache squid 3.1.0.3
- Squid-cache squid 3.1.0.4
- Squid-cache squid 3.1.0.5
- Squid-cache squid 3.1.0.6
- Squid-cache squid 3.1.0.7
- Squid-cache squid 3.1.0.8
- Squid-cache squid 3.1.0.9
- Squid-cache squid 3.1.1
- Squid-cache squid 3.1.10
- Squid-cache squid 3.1.11
- Squid-cache squid 3.1.12
- Squid-cache squid 3.1.13
- Squid-cache squid 3.1.14
- Squid-cache squid 3.1.15
- Squid-cache squid 3.1.2
- Squid-cache squid 3.1.3
- Squid-cache squid 3.1.4
- Squid-cache squid 3.1.5
- Squid-cache squid 3.1.5.1
- Squid-cache squid 3.1.6
- Squid-cache squid 3.1.7
- Squid-cache squid 3.1.8
- Squid-cache squid 3.1.9
References
- BugTraq: 50449
- CVE: CVE-2011-4096