Staging Environment: Content and features may be unstable or change without notice.
Advisory details: vulnrichment / CVE-2021-3517
Advisory ID vulnrichment/CVE-2021-3517
Aliases
Summary There is a flaw in the xml entity encoding functionality of libxml2 in versions before 2.9.11. An attacker who is able to supply a crafted file to be processed by an application linked with the affected functionality of libxml2 could trigger an out-of-bounds read. The most likely impact of this flaw is to application availability, with some potential impact to confidentiality and integrity if an attacker is able to use memory information to further exploit the application.
Status Published
Exploitability 0.5
Weighted Severity 0.0
Risk
Affected and Fixed Packages Package Details
Introduced and Fixed Package Commit Patches Package Commit Patches Details
Weaknesses (1)
CWE-787 Out-of-bounds Write
System Score Found at
cvssv3.1 8.6
ssvc Track
Reference id Reference type URL
202107-05 Advisory https://security.gentoo.org/glsa/202107-05
BZOMV5J4PMZAORVT64BKLV6YIZAFDGX6 Advisory https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BZOMV5J4PMZAORVT64BKLV6YIZAFDGX6/
cpuapr2022.html Other https://www.oracle.com/security-alerts/cpuapr2022.html
cpujan2022.html Other https://www.oracle.com/security-alerts/cpujan2022.html
cpujul2022.html Other https://www.oracle.com/security-alerts/cpujul2022.html
cpuoct2021.html Other https://www.oracle.com/security-alerts/cpuoct2021.html
msg00008.html Mailing List https://lists.debian.org/debian-lts-announce/2021/05/msg00008.html
ntap-20210625-0002 Other https://security.netapp.com/advisory/ntap-20210625-0002/
ntap-20211022-0004 Other https://security.netapp.com/advisory/ntap-20211022-0004/
QVM4UJ3376I6ZVOYMHBNX4GY3NIV52WV Advisory https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QVM4UJ3376I6ZVOYMHBNX4GY3NIV52WV/
r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E Mailing List https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E
rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E Mailing List https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E
show_bug.cgi?id=1954232 Other https://bugzilla.redhat.com/show_bug.cgi?id=1954232
No exploits are available.

No EPSS data available for this advisory.

Patch URL
There are no known patches.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H Found at None
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2025-12-02T21:32:30Z/ Found at None

Vector: SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2025-12-02T21:32:30Z/

Decision: Track

Source URL: https://github.com/cisagov/vulnrichment/blob/develop/2021/3xxx/CVE-2021-3517.json

Source Advisory: vulnrichment/CVE-2021-3517

View SSVC decision tree 
[{'Exploitation': 'none'},
 {'Automatable': 'yes'},
 {'Technical Impact': 'partial'},
 {'Mission Prevalence': 'minimal'},
 {'Public Well-being Impact': 'material'},
 {'Mission & Well-being': 'medium'}]