SB2021100424 - Ubuntu update for mercurial

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Main Vulnerability Database SB2021100424

SB2021100424 - Ubuntu update for mercurial

Published: October 4, 2021

Security Bulletin ID SB2021100424
Severity
Medium
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Remote access
Highest impact Information disclosure

Breakdown by Severity

Medium 50% Low 50%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 secuirty vulnerabilities.


1) Out-of-bounds read (CVE-ID: CVE-2018-17983)

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.


2) Symlink attack (CVE-ID: CVE-2019-3902)

The 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.


Remediation

Install update from vendor's website.

References