Description
Integer underflow in pppd in cbcp.c for ppp 2.4.1 allows remote attackers to cause a denial of service (daemon crash) via a CBCP packet with an invalid length value that causes pppd to access an incorrect memory location.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | ppp | 2.4.2+20040428-3 | — |
| Debian 13 | ppp | 2.4.2+20040428-3 | — |
| Debian 12 | ppp | 2.4.2+20040428-3 | — |
References
- USN-12-1 vendor-advisory
- ppp-ccp-headers-dos(17874) vdb-entry
- 20041026 pppd out of bounds memory access, possible DOS mailing-list