Data Handling in Mercurial

1) Data Handling

EUVDB-ID: #VU32286

Risk: High

CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2016-3630

CWE-ID: CWE-19 - Data Handling

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.

The binary delta decoder in Mercurial before 3.7.3 allows remote attackers to execute arbitrary code via a (1) clone, (2) push, or (3) pull command, related to (a) a list sizing rounding error and (b) short records.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Mercurial: 3.7.0 - 3.7.2

External links

http://lists.fedoraproject.org/pipermail/package-announce/2016-April/181505.html
http://lists.fedoraproject.org/pipermail/package-announce/2016-April/181542.html
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00016.html
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00017.html
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00018.html
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00043.html
http://www.debian.org/security/2016/dsa-3542
http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
http://security.gentoo.org/glsa/201612-19
http://selenic.com/repo/hg-stable/rev/b6ed2505d6cf
http://selenic.com/repo/hg-stable/rev/b9714d958e89
http://www.mercurial-scm.org/wiki/WhatsNew#Mercurial_3.7.3_.282016-3-29.29

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.