Ubuntu.comUB:CVE-2021-36770CVE-2021-36770
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:P/A:P
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS
Percentile
37.9%
Encode.pm, as distributed in Perl through 5.34.0, allows local users to
gain privileges via a Trojan horse Encode::ConfigLocal library (in the
current working directory) that preempts dynamic module loading.
Exploitation requires an unusual configuration, and certain 2021 versions
of Encode.pm (3.05 through 3.11). This issue occurs because the || operator
evaluates @INC in a scalar context, and thus @INC has only an integer
value.
Notes
| Author | Note |
|---|---|
| mdeslaur | Introduced by change in Encode 3.05 in perl 5.32 and 5.34. |
| OS | Version | Architecture | Package | Version | Filename |
|---|---|---|---|---|---|
| ubuntu | 22.04 | noarch | libencode-perl | < any | UNKNOWN |
| ubuntu | 24.04 | noarch | libencode-perl | < any | UNKNOWN |
| ubuntu | 16.04 | noarch | libencode-perl | < any | UNKNOWN |
| ubuntu | 21.04 | noarch | perl | < 5.32.1-3ubuntu2.1 | UNKNOWN |
| ubuntu | 21.10 | noarch | perl | < 5.32.1-3ubuntu3 | UNKNOWN |
| ubuntu | 22.04 | noarch | perl | < 5.32.1-3ubuntu3 | UNKNOWN |
| ubuntu | 22.10 | noarch | perl | < 5.32.1-3ubuntu3 | UNKNOWN |
| ubuntu | 23.04 | noarch | perl | < 5.32.1-3ubuntu3 | UNKNOWN |
| ubuntu | 23.10 | noarch | perl | < 5.32.1-3ubuntu3 | UNKNOWN |
| ubuntu | 24.04 | noarch | perl | < 5.32.1-3ubuntu3 | UNKNOWN |
Related
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:P/A:P
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS
Percentile
37.9%