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osvGoogleOSV:CURL-CVE-2022-43552
HistoryDec 21, 2022 - 8:00 a.m.

HTTP Proxy deny use after free

2022-12-2108:00:00
Google
osv.dev
3

5.9 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

6.6 Medium

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

42.9%

curl can be asked to tunnel virtually all protocols it supports through an
HTTP proxy. HTTP proxies can (and often do) deny such tunnel operations using
an appropriate HTTP error response code.

When getting denied to tunnel the specific protocols SMB or TELNET, curl would
use a heap-allocated struct after it had been freed, in its transfer shutdown
code path.

5.9 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

6.6 Medium

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

42.9%