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ubuntucveUbuntu.comUB:CVE-2021-3517
HistoryMay 19, 2021 - 12:00 a.m.

CVE-2021-3517

2021-05-1900:00:00
ubuntu.com
ubuntu.com
46

7.5 High

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:P/I:P/A:P

8.6 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

HIGH

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

0.017 Low

EPSS

Percentile

87.8%

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.

Bugs

Notes

Author Note
ccdm94 same patch as the one for CVE-2020-24977. As per a comment made by upstream in issue 235 (related to this CVE) both the issues fixed by bf22713507 are caused by the same underlying problem.
OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchlibxml2< 2.9.4+dfsg1-6.1ubuntu1.4UNKNOWN
ubuntu20.04noarchlibxml2< 2.9.10+dfsg-5ubuntu0.20.04.1UNKNOWN
ubuntu20.10noarchlibxml2< 2.9.10+dfsg-5ubuntu0.20.10.2UNKNOWN
ubuntu21.04noarchlibxml2< 2.9.10+dfsg-6.3ubuntu0.1UNKNOWN
ubuntu14.04noarchlibxml2< 2.9.1+dfsg1-3ubuntu4.13+esm2UNKNOWN
ubuntu16.04noarchlibxml2< 2.9.3+dfsg1-1ubuntu0.7+esm1UNKNOWN

7.5 High

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:P/I:P/A:P

8.6 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

HIGH

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

0.017 Low

EPSS

Percentile

87.8%