CVE-2018-1000814 aiohttp-session creates non-expiring sessions

Medium 6.5 Published Updated

Attackers can maintain persistent sessions by reusing expired encrypted cookies, bypassing session expiration controls in aiohttp-session.

Exploited in the wild
Not known
Login needed
Any signed-in user
Attackable
Over the internet
Victim action needed
Not needed
Fix
Available

What is CVE-2018-1000814?

CVE-2018-1000814 is a medium-severity vulnerability in n/a, published on 20 Dec 2018. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

aio-libs aiohttp-session version 2.6.0 and earlier contains a Other/Unknown vulnerability in EncryptedCookieStorage and NaClCookieStorage that can result in Non-expiring sessions / Infinite lifespan. This attack appear to be exploitable via Recreation of a cookie post-expiry with the same value.

Weakness: CWE-613

Which versions are affected by CVE-2018-1000814?

3 open source packages ship an affected version, including aiohttp-session. It affects 1 product.

PackageAffectedFixed in
aiohttp-session PyPIAll versions2.7.0
aiohttp-session PyPIAll versions2.7.0
aiohttp-session PyPIAll versions2.7.0

Products include Aio-Libs Aiohttp Session.

How do I fix CVE-2018-1000814?

Upgrade aiohttp-session to 2.7.0 or later.

Is CVE-2018-1000814 being exploited?

There is no known exploitation of CVE-2018-1000814 in the wild and no public exploit code.

Sources

Also known as GHSA-mr4x-c4v9-x729, PYSEC-2018-35.

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