Integer Overflow or Wraparound Affecting libcurl package, versions *
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-CENTOS7-LIBCURL-1968088
- published26 Jul 2021
- disclosed2 Nov 2016
Introduced: 2 Nov 2016
CVE-2016-8622 (opens in a new tab)How to fix?
There is no fixed version for Centos:7 libcurl.
NVD Description
Note: Versions mentioned in the description apply only to the upstream libcurl package and not the libcurl package as distributed by Centos.
See How to fix? for Centos:7 relevant fixed versions and status.
The URL percent-encoding decode function in libcurl before 7.51.0 is called curl_easy_unescape. Internally, even if this function would be made to allocate a unscape destination buffer larger than 2GB, it would return that new length in a signed 32 bit integer variable, thus the length would get either just truncated or both truncated and turned negative. That could then lead to libcurl writing outside of its heap based buffer.
References
- http://www.securityfocus.com/bid/94105
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-8622
- https://curl.haxx.se/docs/adv_20161102H.html
- https://www.tenable.com/security/tns-2016-21
- http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html
- https://access.redhat.com/security/cve/CVE-2016-8622
- https://security.gentoo.org/glsa/201701-47
- https://access.redhat.com/errata/RHSA-2018:2486
- https://access.redhat.com/errata/RHSA-2018:3558
- http://www.securitytracker.com/id/1037192