Null pointer dereference in curl (Alpine package)

1) Null pointer dereference

EUVDB-ID: #VU11105

Risk: Low

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-1000121

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The weakness exists due to NULL pointer dereference in ldap_get_attribute_ber(). A remote attacker can return a specially crafted redirect to an LDAP URL, trigger NULL pointer dereference and cause the service to crash.//

Mitigation

Install update from vendor's website.

Vulnerable software versions

curl (Alpine package): 7.21.1-r0 - 7.58.0-r2

CPE2.3

• cpe:2.3:o:alpine:curl_alpine_package:7.58.0-r0:*:*:*:*:alpine_linux:*:
• cpe:2.3:o:alpine:curl_alpine_package:7.57.0-r0:*:*:*:*:alpine_linux:*:
• cpe:2.3:o:alpine:curl_alpine_package:7.58.0-r2:*:*:*:*:alpine_linux:*:

External links

http://git.alpinelinux.org/aports/commit/?id=06d873c35d45649783f1d3393b35034356679424
http://git.alpinelinux.org/aports/commit/?id=7d31ed74e2b6d74352c9a6f3ab2110c402a28f3a
http://git.alpinelinux.org/aports/commit/?id=edd0ff244c02b47646e66a1bc5737c6dadee86a5
http://git.alpinelinux.org/aports/commit/?id=f58c96201b3afe219bd0ba4e66ace7f03452ed29

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.