Heap Buffer Overflow

2023-10-1114:40:13

Veracode Vulnerability Database

sca.analysiscenter.veracode.com

curl

vulnerability

socks5

proxy

handshake

heap buffer overflow

arbitrary code execution

software

9.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

7.5 High

CVSS2

Access Vector

NETWORK

Access 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

0.003 Low

EPSS

Percentile

70.4%

JSON

curl is vulnerable to Heap Buffer Overflow. The vulnerability is due to the SOCKS5 proxy handshake. If the hostname is longer then 255 bytes, curl switches to local name resolution, and passes the resolved address to the proxy. If the SOCKS5 handshake is slow, the long hostname is directly copied into the buffer resulting in a Heap Buffer Overflow and possible Arbitrary Code Execution.

CPENameOperatorVersion
libcurl.sole4.8.0
curl:bullseyeeq7.72.0-1
curl:bullseyeeq7.74.0-1.3+b1
curl:sideq7.72.0-1
curl:3.17eq7.87.0-r1
curl:3.17eq8.1.1-r1
curl:3.17eq8.0.1-r0
curl:3.17eq8.2.1-r0
curl:3.17eq7.88.1-r0
curl:3.17eq7.87.0-r0

Name	Operator	Version
libcurl.so	le	4.8.0
curl:bullseye	eq	7.72.0-1
curl:bullseye	eq	7.74.0-1.3+b1
curl:sid	eq	7.72.0-1
curl:3.17	eq	7.87.0-r1
curl:3.17	eq	8.1.1-r1
curl:3.17	eq	8.0.1-r0
curl:3.17	eq	8.2.1-r0
curl:3.17	eq	7.88.1-r0
curl:3.17	eq	7.87.0-r0