Description
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.
Published: 2018-01-24
Score: 9.1 Critical
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
Debian DSA Debian DSA DSA-4098-1 curl security update
EUVD EUVD EUVD-2018-1777 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.
Ubuntu USN Ubuntu USN USN-3554-1 curl vulnerabilities
History

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Subscriptions

Canonical Ubuntu Linux
Debian Debian Linux
Haxx Libcurl
Redhat Jboss Core Services
cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2024-08-05T12:33:49.200Z

Reserved: 2018-01-17T00:00:00.000Z

Link: CVE-2018-1000005

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2018-01-24T22:29:00.307

Modified: 2024-11-21T03:39:24.313

Link: CVE-2018-1000005

cve-icon Redhat

Severity : Low

Publid Date: 2018-01-24T00:00:00Z

Links: CVE-2018-1000005 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses