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archlinuxArchLinuxASA-202106-9
HistoryJun 01, 2021 - 12:00 a.m.

[ASA-202106-9] lib32-libcurl-gnutls: information disclosure

2021-06-0100:00:00
security.archlinux.org
140

3.1 Low

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

NONE

Availability Impact

NONE

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

2.6 Low

CVSS2

Access Vector

NETWORK

Access Complexity

HIGH

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

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

0.002 Low

EPSS

Percentile

54.3%

Arch Linux Security Advisory ASA-202106-9

Severity: Medium
Date : 2021-06-01
CVE-ID : CVE-2021-22898
Package : lib32-libcurl-gnutls
Type : information disclosure
Remote : Yes
Link : https://security.archlinux.org/AVG-2000

Summary

The package lib32-libcurl-gnutls before version 7.77.0-1 is vulnerable
to information disclosure.

Resolution

Upgrade to 7.77.0-1.

pacman -Syu “lib32-libcurl-gnutls>=7.77.0-1”

The problem has been fixed upstream in version 7.77.0.

Workaround

The issue can be mitigated by avoiding to use the -t command line
option and CURLOPT_TELNETOPTIONS.

Description

A security issue has been found in curl before version 7.77.0. curl
supports the -t command line option, known as CURLOPT_TELNETOPTIONS in
libcurl. This rarely used option is used to send variable=content pairs
to TELNET servers. Due to flaw in the option parser for sending NEW_ENV
variables, libcurl could be made to pass on uninitialized data from a
stack based buffer to the server. Therefore potentially revealing
sensitive internal information to the server using a clear-text network
protocol.

Impact

curl could disclose potentially sensitive memory information to a
remote server over Telnet when an uncommon option is used.

References

https://curl.se/docs/CVE-2021-22898.html
https://github.com/curl/curl/commit/39ce47f219b09c380b81f89fe54ac586c8db6bde
https://security.archlinux.org/CVE-2021-22898

OSVersionArchitecturePackageVersionFilename
ArchLinuxanyanylib32-libcurl-gnutls< 7.77.0-1UNKNOWN

3.1 Low

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

NONE

Availability Impact

NONE

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

2.6 Low

CVSS2

Access Vector

NETWORK

Access Complexity

HIGH

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

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

0.002 Low

EPSS

Percentile

54.3%