Allocation of Resources Without Limits or Throttling Affecting libtirpc package, versions <0:0.2.4-0.8.14.amzn1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-AMZN201803-LIBTIRPC-1707269
- published27 Sept 2021
- disclosed4 May 2017
Introduced: 4 May 2017
CVE-2017-8779 (opens in a new tab)How to fix?
Upgrade Amazon-Linux:2018.03 libtirpc to version 0:0.2.4-0.8.14.amzn1 or higher.
This issue was patched in ALAS-2017-840.
NVD Description
Note: Versions mentioned in the description apply only to the upstream libtirpc package and not the libtirpc package as distributed by Amazon-Linux.
See How to fix? for Amazon-Linux:2018.03 relevant fixed versions and status.
rpcbind through 0.2.4, LIBTIRPC through 1.0.1 and 1.0.2-rc through 1.0.2-rc3, and NTIRPC through 1.4.3 do not consider the maximum RPC data size during memory allocation for XDR strings, which allows remote attackers to cause a denial of service (memory consumption with no subsequent free) via a crafted UDP packet to port 111, aka rpcbomb.
References
- http://www.securityfocus.com/bid/98325
- https://security.netapp.com/advisory/ntap-20180109-0001/
- http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-8779
- http://www.debian.org/security/2017/dsa-3845
- https://www.exploit-db.com/exploits/41974/
- https://security.gentoo.org/glsa/201706-07
- http://openwall.com/lists/oss-security/2017/05/03/12
- http://openwall.com/lists/oss-security/2017/05/04/1
- https://github.com/drbothen/GO-RPCBOMB
- https://github.com/guidovranken/rpcbomb/
- https://guidovranken.wordpress.com/2017/05/03/rpcbomb-remote-rpcbind-denial-of-service-patches/
- https://access.redhat.com/errata/RHBA-2017:1497
- https://access.redhat.com/errata/RHSA-2017:1262
- https://access.redhat.com/errata/RHSA-2017:1263
- https://access.redhat.com/errata/RHSA-2017:1267
- https://access.redhat.com/errata/RHSA-2017:1268
- https://access.redhat.com/errata/RHSA-2017:1395
- http://www.securitytracker.com/id/1038532
- https://usn.ubuntu.com/3759-1/
- https://usn.ubuntu.com/3759-2/