CVE-2017-9047

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Summary

CVECVE-2017-9047
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2017-05-18 06:29:00 UTC
Updated2023-11-07 02:50:00 UTC
DescriptionA buffer overflow was discovered in libxml2 20904-GITv2.9.4-16-g0741801. The function xmlSnprintfElementContent in valid.c is supposed to recursively dump the element content definition into a char buffer 'buf' of size 'size'. The variable len is assigned strlen(buf). If the content->type is XML_ELEMENT_CONTENT_ELEMENT, then (i) the content->prefix is appended to buf (if it actually fits) whereupon (ii) content->name is written to the buffer. However, the check for whether the content->name actually fits also uses 'len' rather than the updated buffer length strlen(buf). This allows us to write about "size" many bytes beyond the allocated memory. This vulnerability causes programs that use libxml2, such as PHP, to crash.

Risk And Classification

Problem Types: CWE-119

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Xmlsoft Libxml2 2.9.4 All All All
Application Xmlsoft Libxml2 2.9.4 All All All

References

ReferenceSourceLinkTags
[bookkeeper-issues] 20210628 [GitHub] [bookkeeper] padma81 opened a new issue #2746: Security Vulnerabilities in CentOS 7 image, Upgrade image to CentOS 8 lists.apache.org
libxml2: Multiple vulnerabilities (GLSA 201711-01) — Gentoo security GENTOO security.gentoo.org
Pony Mail! MLIST lists.apache.org
oss-security - Invalid writes and reads in libxml2 MISC www.openwall.com Exploit, Mailing List, Patch, Third Party Advisory
Debian -- Security Information -- DSA-3952-1 libxml2 DEBIAN www.debian.org
Pony Mail! MLIST lists.apache.org
[bookkeeper-issues] 20210629 [GitHub] [bookkeeper] padma81 opened a new issue #2746: Security Vulnerabilities in CentOS 7 image, Upgrade image to CentOS 8 lists.apache.org
Libxml2 CVE-2017-9047 Buffer Overflow Vulnerability BID www.securityfocus.com Third Party Advisory, VDB Entry
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 591406 Siemens SIMATIC S7-1500 CPU GNU/Linux subsystem Multiple Vulnerabilities (SSB-439005, ICSA-22-104-13)
  • 710359 Gentoo Linux libxml2 Multiple Vulnerabilities (GLSA 201711-01)
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