NULL pointer dereference in php7 (Alpine package)
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2021-21702 |
| CWE-ID | CWE-476 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
php7 (Alpine package) Operating systems & Components / Operating system package or component |
| Vendor | Alpine Linux Development Team |
Security Bulletin
This security bulletin contains one medium risk vulnerability.
1) NULL pointer dereference
EUVDB-ID: #VU50403
Risk: Medium
CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2021-21702
CWE-ID:
CWE-476 - NULL Pointer Dereference
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a NULL pointer dereference error within the SoapClient in PHP. A remote attacker can pass specially crafted data to the application and perform a denial of service (DoS) attack.
MitigationInstall update from vendor's website.
Vulnerable software versionsphp7 (Alpine package): 7.3.7-r0 - 7.4.14-r0
External linkshttp://git.alpinelinux.org/aports/commit/?id=f02a09d92f8e9b0b056cd083155c0cd2b22d3e18
http://git.alpinelinux.org/aports/commit/?id=22c618525dfb6ca90f02cc171c9aa97b2dcf418e
http://git.alpinelinux.org/aports/commit/?id=3fc482c6b547e3abb034df263ea4553a92283997
http://git.alpinelinux.org/aports/commit/?id=1200b256e3e18a72b01f31915e839e1fbd9ca0d8
http://git.alpinelinux.org/aports/commit/?id=212ff6b70afd9afdb6585306de50fb4b6e9d50d5
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.
