Subject: hash built-in function in python3 is salted

From: "Fernando M. Maresca (Monitoring Station S.A.)" <[email-masked]>
Date: Wed, 05 Oct 2022 09:51:12 -0300

Package: greylistd
Version: 0.8.8.7
Severity: grave

The hash() function used to hash triplets in python3 has a different
behaviour that the python2 version. 

py3 hash() is salted, so the hash it produces for the same input text differs between runs.

That produces two problems in greylistd:
- multiple entries added to the lists 
- checks produces different keys

To reproduce:
- start greylistd

- greylist clear
- greylist list --white (verify is empty)
- greylist add --white a.com
- greylist list --white (verify a.com is in wl)
- greylist check a.com (should be white)

- restart greylistd
- greylist list --white (verify a.com is in wl)
- greylist check a.com (returns grey, should be white)

Thank you.

-- System Information:
Distributor ID:	Devuan
Description:	Devuan GNU/Linux 3 (beowulf)
Release:	3
Codename:	beowulf
Architecture: x86_64

Kernel: Linux 5.10.0-0.bpo.7-amd64 (SMP w/12 CPU cores)
Locale: LANG=es_AR.UTF-8, LC_CTYPE=es_AR.UTF-8 (charmap=UTF-8), LANGUAGE=es_AR:es (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: sysvinit (via /sbin/init)
LSM: AppArmor: enabled

Versions of packages greylistd depends on:
ii  adduser                3.118
ii  debconf [debconf-2.0]  1.5.71+deb10u1
ii  python                 2.7.16-1

Versions of packages greylistd recommends:
ii  exim4  4.92-8+deb10u6

greylistd suggests no packages.

-- debconf-show failed

---

From: Mark Hindley <[email-masked]>
Date: Wed, 5 Oct 2022 18:29:22 +0100

Control: tags -1 debian

Fernando,

Thanks for this.

> Severity: grave

However, greylistd is not forked in Devuan and we use Debian's packages directly
without recompilation. Please report this issue to Debian's BTS to be addressed.

Thanks.

Mark

---

From: "Fernando M. Maresca" <[email-masked]>
Date: Thu, 6 Oct 2022 08:06:09 -0300

> without recompilation. Please report this issue to Debian's BTS to be addressed.

Yes, sorry, my bad.
Thank you.

-- 
    Fernando M. Maresca

---

From: Mark Hindley <[email-masked]>
Date: Thu, 6 Oct 2022 12:46:08 +0100

> > without recompilation. Please report this issue to Debian's BTS to be addressed.

Not at all.

When you have, maybe you could add the Debian bug number here so we can track it
easily?

Thanks

Mark

---

From: "Fernando M. Maresca" <[email-masked]>
Date: Thu, 6 Oct 2022 13:58:13 -0300

> When you have, maybe you could add the Debian bug number here so we can track it

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1021356.

Best regards,
Fer

-- 
    Fernando M. Maresca
    Monitoring Station S.A.

---

From: Mark Hindley <[email-masked]>
Date: Thu, 6 Oct 2022 19:05:25 +0100

Control: forwarded -1  https://bugs.debian.org/1021356.

Fernando,

> > When you have, maybe you could add the Debian bug number here so we can track it

Great, thanks.

Mark

---

From: Mark Hindley <[email-masked]>
Date: Fri, 7 Oct 2022 07:48:38 +0100

forwarded 716 https://bugs.debian.org/1021356