python before versions 2.7.15, 3.4.9, 3.5.6rc1, 3.6.5rc1 and 3.7.0 is vulnerable to catastrophic backtracking in pop3lib's apop() method. An attacker could use this flaw to cause denial of service.
2.7.6-8ubuntu0.53.4.3-1ubuntu1~14.04.72.7.12-1ubuntu0~16.04.43.5.2-2ubuntu0~16.04.53.5.2-2ubuntu0~16.04.4~14.04.1+esm1Exploitability
AV:NAC:LPR:NUI:NScope
S:UImpact
C:NI:NA:HCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H