Use After Free Affecting curl-debuginfo package, versions <0:7.61.1-9.amzn2.0.1
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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- published27 Sept 2021
- disclosed31 Oct 2018
Introduced: 31 Oct 2018
CVE-2018-16840 (opens in a new tab)How to fix?
Upgrade Amazon-Linux:2 curl-debuginfo to version 0:7.61.1-9.amzn2.0.1 or higher.
This issue was patched in ALAS2-2019-1162.
NVD Description
Note: Versions mentioned in the description apply only to the upstream curl-debuginfo package and not the curl-debuginfo package as distributed by Amazon-Linux.
See How to fix? for Amazon-Linux:2 relevant fixed versions and status.
A heap use-after-free flaw was found in curl versions from 7.59.0 through 7.61.1 in the code related to closing an easy handle. When closing and cleaning up an 'easy' handle in the Curl_close() function, the library code first frees a struct (without nulling the pointer) and might then subsequently erroneously write to a struct field within that already freed struct.
References
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16840
- https://github.com/curl/curl/commit/81d135d67155c5295b1033679c606165d4e28f3f
- http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-16840
- https://security.gentoo.org/glsa/201903-03
- https://curl.haxx.se/docs/CVE-2018-16840.html
- http://www.securitytracker.com/id/1042013
- https://usn.ubuntu.com/3805-1/