Description
Heap-based buffer overflow in the proxy_connect function in src/client.c in CVS 1.11 and 1.12 allows remote HTTP proxy servers to cause a denial of service (crash) and possibly execute arbitrary code via a crafted HTTP response.
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 | cvs | 2:1.12.13+real-7 | — |
| Debian 13 | cvs | 2:1.12.13+real-7 | — |
| Debian 12 | cvs | 2:1.12.13+real-7 | — |
| Debian 6.0 | cvs | 1:1.12.13-12+squeeze1 | DSA-2407-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 6 | cvs | 1.11.23-11.el6_2.1 | RHSA-2012:0321 |
| RHEL 5 | cvs +1 | 1.11.22-11.el5_8.1 | RHSA-2012:0321 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | cvs | 1.12.12-183.10 | openSUSE-SU-2024:10504-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | cvs | 1.12.12-r0 | — |
| Alpine v3.23 | cvs | 1.12.12-r0 | — |
| Alpine v3.22 | cvs | 1.12.12-r0 | — |
| Alpine v3.21 | cvs | 1.12.12-r0 | — |
| Alpine v3.20 | cvs | 1.12.12-r0 | — |
Show 12 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | cvs | 1.12.12-r0 | — |
| Alpine v3.18 | cvs | 1.12.12-r0 | — |
| Alpine v3.17 | cvs | 1.12.12-r0 | — |
| Alpine v3.16 | cvs | 1.12.12-r0 | — |
| Alpine v3.15 | cvs | 1.12.12-r0 | — |
| Alpine v3.14 | cvs | 1.12.12-r0 | — |
| Alpine v3.13 | cvs | 1.12.12-r0 | — |
| Alpine v3.12 | cvs | 1.12.12-r0 | — |
| Alpine v3.11 | cvs | 1.12.12-r0 | — |
| Alpine v3.10 | cvs | 1.12.12-r0 | — |
| Alpine v3.9 | cvs | 1.12.12-r0 | — |
| Alpine v3.8 | cvs | 1.12.12-r0 | — |
Advisories 3
- RHSA-2012:0321 Red Hat Security Advisory: cvs security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- DSA-2407-1 cvs - heap overflow Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2024:10504-1 cvs-1.12.12-183.10 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
References
- openSUSE-SU-2012:0310 vendor-advisory
- 1026719 vdb-entry
- 48150 third-party-advisory
- cvs-proxyconnect-bo(73097) vdb-entry
- RHSA-2012:0321 vendor-advisory
- MDVSA-2012:044 vendor-advisory
- 78987 vdb-entry
- 48142 third-party-advisory
- USN-1371-1 vendor-advisory
- 47869 third-party-advisory
- GLSA-201701-44 vendor-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=784141
- DSA-2407 vendor-advisory
- 51943 vdb-entry
- 48063 third-party-advisory