Missing Authentication for Critical Function Affecting shadowsocks-libev package, versions <3.3.3+ds-2


Severity

Recommended
0.0
high
0
10

Snyk's Security Team recommends NVD's CVSS assessment

    Threat Intelligence

    EPSS
    0.13% (48th percentile)

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  • Snyk ID SNYK-DEBIAN11-SHADOWSOCKSLIBEV-536396
  • published 2 Dec 2019
  • disclosed 3 Dec 2019

How to fix?

Upgrade Debian:11 shadowsocks-libev to version 3.3.3+ds-2 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream shadowsocks-libev package and not the shadowsocks-libev package as distributed by Debian. See How to fix? for Debian:11 relevant fixed versions and status.

An exploitable denial-of-service vulnerability exists in the UDPRelay functionality of Shadowsocks-libev 3.3.2. When utilizing a Stream Cipher and a local_address, arbitrary UDP packets can cause a FATAL error code path and exit. An attacker can send arbitrary UDP packets to trigger this vulnerability.

CVSS Scores

version 3.1
Expand this section

NVD

7.5 high
  • Attack Vector (AV)
    Network
  • Attack Complexity (AC)
    Low
  • Privileges Required (PR)
    None
  • User Interaction (UI)
    None
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    None
  • Integrity (I)
    None
  • Availability (A)
    High