CVE-2011-2778
Multiple heap-based buffer overflows in Tor before 0.2.2.35 allow remote attackers to cause a...
CVE-2011-2778 is a high vulnerability (CVSS 7.6) in Tor, published December 16, 2011. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 3.77%, the 89th percentile. Fixed in tor 0.2.2.35-1.
Multiple heap-based buffer overflows in Tor before 0.2.2.35 allow remote attackers to cause a denial of service (memory corruption) or possibly execute arbitrary code by (1) establishing a SOCKS connection to SocksPort or (2) leveraging a SOCKS proxy configuration.
Exploit likelihood
What each source reports
NVD Score used
Multiple heap-based buffer overflows in Tor before 0.2.2.35 allow remote attackers to cause a denial of service (memory corruption) or possibly execute arbitrary code by (1) establishing a SOCKS connection to SocksPort or (2) leveraging a SOCKS proxy configuration.
- Record
CVE-2011-2778- CVSS 2.0
- 7.6 High
AV:N/AC:H/Au:N/C:C/I:C/A:C - Weakness
- CWE-119
- Updated
- 2026-11-02
CVE List No score
Multiple heap-based buffer overflows in Tor before 0.2.2.35 allow remote attackers to cause a denial of service (memory corruption) or possibly execute arbitrary code by (1) establishing a SOCKS connection to SocksPort or (2) leveraging a SOCKS proxy configuration.
- Record
CVE-2011-2778- Updated
- 2026-11-02
EUVDEUVD-2011-2752 No score
Multiple heap-based buffer overflows in Tor before 0.2.2.35 allow remote attackers to cause a denial of service (memory corruption) or possibly execute arbitrary code by (1) establishing a SOCKS connection to SocksPort or (2) leveraging a SOCKS proxy configuration.
- Record
EUVD-2011-2752- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-63gv-rq26-r5mp No score
Multiple heap-based buffer overflows in Tor before 0.2.2.35 allow remote attackers to cause a...
Multiple heap-based buffer overflows in Tor before 0.2.2.35 allow remote attackers to cause a denial of service (memory corruption) or possibly execute arbitrary code by (1) establishing a SOCKS connection to SocksPort or (2) leveraging a SOCKS proxy configuration.
- Record
GHSA-63gv-rq26-r5mp- Weakness
- CWE-119
- Updated
- 2026-11-02
OSV No score
Multiple heap-based buffer overflows in Tor before 0.2.2.35 allow remote attackers to cause a denial of service (memory corruption) or possibly execute arbitrary code by (1) establishing a SOCKS connection to SocksPort or (2) leveraging a SOCKS proxy configuration.
- Record
CVE-2011-2778- Updated
- 2026-11-02
OSVDEBIAN-CVE-2011-2778 No score
Multiple heap-based buffer overflows in Tor before 0.2.2.35 allow remote attackers to cause a denial of service (memory corruption) or possibly execute arbitrary code by (1) establishing a SOCKS connection to SocksPort or (2) leveraging a SOCKS proxy configuration.
- Record
DEBIAN-CVE-2011-2778- Updated
- 2026-11-02
OSVopenSUSE-SU-2024:10423-1 No score
tor-0.2.8.11-1.1 on GA media
These are all security issues fixed in the tor-0.2.8.11-1.1 package on the GA media of openSUSE Tumbleweed.
- Record
openSUSE-SU-2024:10423-1- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
torDebian:12 |
before 0.2.2.35-1 | 0.2.2.35-1 |
torDebian:13 |
before 0.2.2.35-1 | 0.2.2.35-1 |
torDebian:14 |
before 0.2.2.35-1 | 0.2.2.35-1 |
torDebian:6.0 |
before 0.2.2.35-1~squeeze+1, plus listed versions 0.2.1.29-10.2.1.30-10.2.1.31-10.2.1.31-1~lenny+10.2.1.32-1 Show 37 moreShow less0.2.2.1-alpha-10.2.2.10-alpha-10.2.2.10-alpha-20.2.2.11-alpha-10.2.2.12-alpha-10.2.2.13-alpha-10.2.2.14-alpha-10.2.2.15-alpha-10.2.2.16-alpha-10.2.2.17-alpha-10.2.2.18-alpha-10.2.2.18-alpha-20.2.2.19-alpha-10.2.2.2-alpha-10.2.2.20-alpha-10.2.2.21-alpha-10.2.2.22-alpha-10.2.2.23-alpha-10.2.2.27-beta-10.2.2.28-beta-10.2.2.29-beta-10.2.2.3-alpha-10.2.2.30-rc-10.2.2.31-rc-10.2.2.32-10.2.2.32-1~bpo60+10.2.2.33-10.2.2.33-1~bpo60+10.2.2.34-10.2.2.34-1~bpo60+10.2.2.4-alpha-10.2.2.5-alpha-10.2.2.6-alpha-10.2.2.7-alpha-10.2.2.7-alpha-20.2.2.8-alpha-10.2.2.9-alpha-1 |
0.2.2.35-1~squeeze+1 |
torDebian:5.0 |
before 0.2.1.32-1, plus listed versions 0.2.0.33-10.2.0.34-10.2.0.34-1~bpo40+10.2.0.35-10.2.0.35-1~lenny1 Show 45 moreShow less0.2.0.35-1~lenny20.2.1.10-alpha-10.2.1.11-alpha-10.2.1.12-alpha-10.2.1.13-alpha-10.2.1.14-rc-10.2.1.15-rc-10.2.1.16-rc-10.2.1.17-rc-10.2.1.18-10.2.1.19-10.2.1.2-alpha-10.2.1.20-10.2.1.20-20.2.1.21-10.2.1.21-1~bpo50+10.2.1.22-10.2.1.22-1~bpo50+10.2.1.23-10.2.1.23-20.2.1.25-10.2.1.25-1~bpo50+10.2.1.25-20.2.1.25-30.2.1.26-10.2.1.26-1~bpo50+10.2.1.26-1~lenny+10.2.1.26-1~lenny+20.2.1.26-1~lenny+40.2.1.26-1~lennyvolatile10.2.1.26-1~lennyvolatile20.2.1.26-20.2.1.26-30.2.1.26-40.2.1.26-4~bpo50+10.2.1.26-50.2.1.26-60.2.1.26-6~bpo50+10.2.1.29-10.2.1.29-1~lenny+10.2.1.30-10.2.1.31-10.2.1.31-1~lenny+10.2.1.4-alpha-10.2.1.5-alpha-1 |
0.2.1.32-1 |
toropenSUSE:Tumbleweed |
before 0.2.8.11-1.1 | 0.2.8.11-1.1 |
History
| When | Changed | Sources |
|---|---|---|
| 2026-11-03 | aliases | EUVD |
| 2026-11-02 | created | CVE List, GitHub Advisories, NVD, OSV |
References
blog.torproject.org/blog/tor-02235-released-security-patches
debian.org/security/2011/dsa-2363
nvd.nist.gov/vuln/detail/CVE-2011-2778
github.com/advisories/GHSA-63gv-rq26-r5mp
security-tracker.debian.org/tracker/CVE-2011-2778
suse.com/security/cve/CVE-2011-0427
Show 21 moreShow less
Left out here: 5 versions. The JSON record has them.