[manjaro-security] [arch-security] [ASA-201708-13] strongswan: denial of service

Christian Rebischke Chris.Rebischke at archlinux.org
Tue Aug 15 14:01:53 CEST 2017

Arch Linux Security Advisory ASA-201708-13

Severity: Low
Date    : 2017-08-14
CVE-ID  : CVE-2017-11185
Package : strongswan
Type    : denial of service
Remote  : Yes
Link    : https://security.archlinux.org/AVG-382


The package strongswan before version 5.5.3-4 is vulnerable to denial
of service.


Upgrade to 5.5.3-4.

# pacman -Syu "strongswan>=5.5.3-4"

The problem has been fixed upstream but no release is available yet.




Fixed a DoS vulnerability in the gmp plugin that was caused by
insufficient input validation when verifying RSA signatures, which
requires decryption with the operation m^e mod n, where m is the
signature, and e and n are the exponent and modulus of the public key.
The value m is an integer between 0 and n-1, however, the gmp plugin
did not verify this. So if m equals n the calculation results in 0, in
which case mpz_export() returns NULL. This result wasn't handled
properly causing a null-pointer dereference.


The attacker is able to crash the application via a specially crafted
RSA signature.


-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 833 bytes
Desc: not available
URL: <http://lists.manjaro.org/pipermail/manjaro-security/attachments/20170815/aa2d8f29/attachment.sig>

More information about the manjaro-security mailing list