Vulnerability identifier: #VU15317

Vulnerability risk: Low

CVSSv3.1: 3.9 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-17983

CWE-ID: CWE-125

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Mercurial
Client/Desktop applications / Other client software

Vendor: Mercurial

Description

The vulnerability allows a local attacker to obtain potentially sensitive information or cause DoS condition on the target system.

The vulnerability exists in the cext/manifest.c file due to improper parsing of manifest entries. A remote attacker can send a manifest entry that submits malicious input, trigger an out-of-bounds read condition to access sensitive information or cause a denial of service (DoS) condition.

Mitigation
Update to version 4.7.2.

Vulnerable software versions

Mercurial: 4.0.0 - 4.7.1

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External links
http://www.mercurial-scm.org/wiki/WhatsNew#Mercurial_4.7.2_.282018-10-01.29

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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