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Loop with Unreachable Exit Condition ('Infinite Loop')

CVE-2018-9251

Medium
5.3/10

Summary

The "xz_decomp" function in "xzlib.c" in libxml2 prior to v2.9.9-rc1, if --with-lzma is used, allows remote attackers to cause a Denial of Service (infinite loop) via a crafted XML file that triggers "LZMA_MEMLIMIT_ERROR", as demonstrated by xmllint, a different vulnerability than CVE-2015-8035.

  • HIGH
  • NETWORK
  • NONE
  • UNCHANGED
  • REQUIRED
  • NONE
  • NONE
  • HIGH

CWE-835 - Loop with Unreachable Exit Condition

Loops with multiple exits and flags detract from the quality of an application. They tend to make control structures difficult to understand, and introduce the risk of non-termination and other structural problems. The vulnerability “loop with unreachable exit condition” enables attackers to exploit this flaw, leading to denial of service.

References

Advisory Timeline

  • Published