Out-of-bounds Read Affecting curl package, versions <7.52.1-5+deb9u4
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-DEBIAN9-CURL-358535
- published24 Jan 2018
- disclosed24 Jan 2018
Introduced: 24 Jan 2018
CVE-2018-1000005 (opens in a new tab)How to fix?
Upgrade Debian:9 curl to version 7.52.1-5+deb9u4 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream curl package and not the curl package as distributed by Debian.
See How to fix? for Debian:9 relevant fixed versions and status.
libcurl 7.49.0 to and including 7.57.0 contains an out bounds read in code handling HTTP/2 trailers. It was reported (https://github.com/curl/curl/pull/2231) that reading an HTTP/2 trailer could mess up future trailers since the stored size was one byte less than required. The problem is that the code that creates HTTP/1-like headers from the HTTP/2 trailer data once appended a string like : to the target buffer, while this was recently changed to : (a space was added after the colon) but the following math wasn't updated correspondingly. When accessed, the data is read out of bounds and causes either a crash or that the (too large) data gets passed to client write. This could lead to a denial-of-service situation or an information disclosure if someone has a service that echoes back or uses the trailers for something.
References
- https://security-tracker.debian.org/tracker/CVE-2018-1000005
- https://curl.haxx.se/docs/adv_2018-824a.html
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-1000005
- https://www.debian.org/security/2018/dsa-4098
- https://github.com/curl/curl/pull/2231
- https://access.redhat.com/errata/RHSA-2019:1543
- http://www.securitytracker.com/id/1040273
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2018-1000005
- https://usn.ubuntu.com/3554-1/