CVE-2018-1000005

NameCVE-2018-1000005
Descriptionlibcurl 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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
NVD severitymedium

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
curl (PTS)jessie7.38.0-4+deb8u11fixed
jessie (security)7.38.0-4+deb8u16fixed
stretch (security), stretch7.52.1-5+deb9u9fixed
buster7.64.0-4fixed
bullseye, sid7.66.0-1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
curlsource(unstable)7.58.0-1
curlsourcejessie(not affected)
curlsourcestretch7.52.1-5+deb9u4
curlsourcewheezy(not affected)

Notes

[jessie] - curl <not-affected> (Vulnerable code introduce later)
[wheezy] - curl <not-affected> (Vulnerable code introduce later)
https://github.com/curl/curl/pull/2231
https://curl.haxx.se/docs/adv_2018-824a.html
Introduced by: https://github.com/curl/curl/commit/0761a51ee0551ad9e5
Patch: https://github.com/curl/curl/commit/fa3dbb9a147488a294.patch

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