SARA / Free Tools / CVE / CVE-2017-9050

CVE-2017-9050 — libxml2 20904-GITv2

libxml2 20904-GITv2.9.4-16-g0741801 is vulnerable to a heap-based buffer over-read in the xmlDictAddString function in dict.c. This vulnerability causes programs that use libxml2, such as PHP, to crash. This vulnerability exists because of an incomplete fix for CVE-2016-1839.

CVSS

7.5 HIGH

EPSS

4.63% (top 8.40%)

CWE

—

Published

2017-05-18T06:29:00.497

Last modified

2026-10-14T07:16:41.420

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

01What is this vulnerability?

02Affected products

No structured affected-product list available — see references below for vendor advisories.

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

Patch to a fixed version listed in the vendor advisory (see references below).
Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

CVE-2016-1839

Cited in vendor advisory

08Timeline

Published: 2017-05-18T06:29:00.497
Last modified: 2026-10-14T07:16:41.420

09References

www.debian.org — http://www.debian.org/security/2017/dsa-3952
www.openwall.com — http://www.openwall.com/lists/oss-security/2017/05/15/1
www.securityfocus.com — http://www.securityfocus.com/bid/98568
lists.apache.org — https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e3…
lists.apache.org — https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8…
security.gentoo.org — https://security.gentoo.org/glsa/201711-01
www.debian.org — http://www.debian.org/security/2017/dsa-3952
www.openwall.com — http://www.openwall.com/lists/oss-security/2017/05/15/1
www.securityfocus.com — http://www.securityfocus.com/bid/98568
lists.apache.org — https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e3…

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