Symlink attack in mercurial (Alpine package)
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2019-3902 |
| CWE-ID | CWE-61 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
mercurial (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) Symlink attack
EUVDB-ID: #VU29241
Risk: Medium
CVSSv3.1: 4 [CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2019-3902
CWE-ID:
CWE-61 - UNIX Symbolic Link (Symlink) Following
Exploit availability: No
DescriptionThe vulnerability allows a remote user to escalate privileges on the system.
The vulnerability exists due to a symlink following issue. A remote user can create a specially crafted symbolic link to and write files outside a repository.
MitigationInstall update from vendor's website.
Vulnerable software versionsmercurial (Alpine package): 4.0.1-r0 - 4.5.2-r0
External linkshttp://git.alpinelinux.org/aports/commit/?id=e30587e6d086657c2b20040a01408e6a321fc5fc
http://git.alpinelinux.org/aports/commit/?id=cfa31bbcb6d2842fc65e144769cdd9e246600584
http://git.alpinelinux.org/aports/commit/?id=62755c77c68aad877b194aa2678fb06b337091ea
http://git.alpinelinux.org/aports/commit/?id=87765f5b665bb32c812b026658f7b2fdc4d1c816
http://git.alpinelinux.org/aports/commit/?id=0012ca0681bdad7f646920585fa58905c7e30cee
http://git.alpinelinux.org/aports/commit/?id=02e8c94d8877d6acdff3f6bde864ba4b5cf6b985
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
