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debianDebianDEBIAN:DLA-2773-1:5DA4A
HistorySep 30, 2021 - 9:58 p.m.

[SECURITY] [DLA 2773-1] curl security update

2021-09-3021:58:49
lists.debian.org
58

5 Medium

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

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

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

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

8 High

AI Score

Confidence

High

0.003 Low

EPSS

Percentile

69.8%


Debian LTS Advisory DLA-2773-1 [email protected]
https://www.debian.org/lts/security/ Thorsten Alteholz
September 30, 2021 https://wiki.debian.org/LTS


Package : curl
Version : 7.52.1-5+deb9u16
CVE ID : CVE-2021-22946 CVE-2021-22947

Two issues have been found in curl, a command line tool and an easy-to-use
client-side library for transferring data with URL syntax.

CVE-2021-22946
Crafted answers from a server might force clients to not use TLS on
connections though TLS was required and expected.

CVE-2021-22947
When using STARTTLS to initiate a TLS connection, the server might
send multiple answers before the TLS upgrade and such the client
would handle them as being trusted. This could be used by a
MITM-attacker to inject fake response data.

For Debian 9 stretch, these problems have been fixed in version
7.52.1-5+deb9u16.

We recommend that you upgrade your curl packages.

For the detailed security status of curl please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/curl

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS

5 Medium

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

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

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

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

8 High

AI Score

Confidence

High

0.003 Low

EPSS

Percentile

69.8%