Integer Overflow or Wraparound Affecting glibc package, versions <2.26-0ubuntu2.1
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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Test your applications- Snyk IDSNYK-UBUNTU1710-GLIBC-356889
- published5 Dec 2017
- disclosed5 Dec 2017
Introduced: 5 Dec 2017
CVE-2017-17426 (opens in a new tab)How to fix?
Upgrade Ubuntu:17.10 glibc to version 2.26-0ubuntu2.1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream glibc package and not the glibc package as distributed by Ubuntu.
See How to fix? for Ubuntu:17.10 relevant fixed versions and status.
The malloc function in the GNU C Library (aka glibc or libc6) 2.26 could return a memory block that is too small if an attempt is made to allocate an object whose size is close to SIZE_MAX, potentially leading to a subsequent heap overflow. This occurs because the per-thread cache (aka tcache) feature enables a code path that lacks an integer overflow check.
References
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2017-17426
- https://sourceware.org/bugzilla/show_bug.cgi?id=22375
- https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=34697694e8a93b325b18f25f7dcded55d6baeaf6
- https://sourceware.org/git/gitweb.cgi?p=glibc.git%3Bh=34697694e8a93b325b18f25f7dcded55d6baeaf6